JP4923118B2 - Lantern leg mounting structure, lantern leg mounting structure holding member and lantern - Google Patents

Description

  The present invention relates to a standing or self-supporting lantern having a plurality of (usually three) legs called lower legs (generally referred to as a “Large Lantern” type of lantern). Or a lantern leg mounting structure for mounting a plurality of legs to a disk-shaped base called a rocker, a holding member used in the leg mounting structure, and a lantern provided with the leg mounting structure It is.

  Conventionally, as this type of technology, for example, there is a technology described in Patent Document 1. In Patent Document 1, the workability of the mounting recess for the leg on the lower surface side of the disk-shaped base and the mounting recess for the column called the upper leg, and the mounting convex that is the mounting portion of the leg with respect to the base, There has been disclosed a lantern that can improve the workability of the mounting convex portion that is the mounting portion. Specifically, this lantern is formed with an upper recess for attaching the support column so as to extend vertically on the upper surface of the base. A fitting projection having a shape corresponding to the upper concave portion of the base is integrally formed at the lower end of the support column, and a split groove extending vertically is formed at a substantially horizontal center of the fitting projection. Moreover, the lower side recessed part for attaching a leg so that it may extend up and down is formed in the lower surface of a base. Furthermore, a fitting protrusion having a shape corresponding to the lower recess of the base is integrally formed at the upper end of the leg, and a split groove extending vertically is formed at the substantially horizontal center of the fitting protrusion.

  According to this lantern, it is possible to improve the workability of the protrusions of the columns or legs and the corresponding recesses of the base and the workability of mounting the columns or legs to the base, and to connect the legs after the mounting. It is possible to effectively prevent the tool from falling off the legs.

JP 2002-319301 A

  Here, as a result of earnest research on the mounting structure of the lantern lantern legs, the present inventors have come up with the structure of the lantern lantern mounting structure based on a completely new concept. The inventors of the present invention have invented a lantern leg mounting structure that can be applied to specific products as a result of various trials and errors and diligent research in order to embody this idea.

  In other words, according to the present invention, in a lantern type lantern, a plurality of legs can be easily and quickly attached to the base at the time of assembling, and after the legs are attached to the base, the mounting state without rattling is stable. On the other hand, when the legs are disassembled, a plurality of legs can be easily and quickly removed from the base with a single touch, a lantern leg mounting structure, a holding member used in the leg mounting structure, And it makes it a subject to provide the lantern provided with the attachment structure of the said leg.

  The lantern leg mounting structure according to claim 1 is for attaching an upper end portion of a leg to a lower surface side of a base of a lantern type lantern, and includes a leg insertion portion disposed at an upper end of the leg. And a leg holding portion which is disposed at a leg mounting position on the base and can hold the leg insertion portion. The leg insertion portion has a cylindrical or columnar shape protruding upward from the upper end of the leg, and has a leg-side locking portion including a concave portion or a convex portion on a side surface. On the other hand, the leg holding portion has a cylindrical shape embedded in the base so that the axial direction is the thickness direction of the base. The leg holding portion has a base, and the base has, as an internal space, an upper storage space disposed on the upper surface side of the base and a lower storage space disposed on the lower surface side of the base. . The base has the lower receiving space as a space shape corresponding to the outer shape of the leg inserting portion, and the leg inserting portion can be inserted and accommodated. The pressing portion is disposed in the upper accommodation space of the base portion and can be moved up and down, and can be pressed downward and elastically. A base side locking portion is disposed at a portion corresponding to the leg side locking portion when the leg insertion portion is stored in the lower storage space in the lower storage space of the base, and the leg insertion And a convex portion or a concave portion that latches the leg-side engaging portion of the leg insertion portion in a concave-convex relationship when the portion is accommodated in the lower accommodating space. A base side locking portion; a connecting portion connected to the pressing portion inside the base portion; and an original position that is an upper position in the lower accommodation space of the base portion, A release portion that moves from the original position to the lower release position via the connecting portion, and returns to the original position from the release position via the connecting portion by releasing the pressing operation of the pressing portion. In the state where the leg insertion part is accommodated in the lower accommodation space, the release part is brought into the release position by a pressing operation of the pressing part, so that the leg side engagement part by the base side engagement part Release the lock.

  The lantern leg mounting structure according to claim 2 is characterized in that, in the configuration of claim 1, the leg insertion portion is further linear in the length direction on a side surface other than the side surface on which the leg side locking portion is provided. The leg side guide part which consists of a recessed part or convex part extended in is provided. On the other hand, in the lantern leg mounting structure according to claim 2, the leg holding portion further includes the leg side when the leg insertion portion is accommodated in the lower accommodation space in the lower accommodation space of the base. When the leg insertion portion is accommodated in the lower receiving space, the leg insertion portion is fitted in a concave-convex relationship with the leg side guide portion of the leg insertion portion. A base-side guide portion including a convex portion or a concave portion for guiding the insertion operation of the portion. In a state where the upper end portion of the leg insertion portion is inserted into the lower accommodating space of the leg holding portion, the opposing side surfaces in the width direction of the leg side guide portion and the base side guide portion which are in a fitted state with each other In a state where a predetermined gap is provided therebetween and the entire leg insertion portion is inserted into the lower accommodating space of the leg holding portion, the leg side guide portion and the base side which are fitted to each other The width of the leg side guide part and the width of the base side guide part were set so that the opposing side surfaces in the respective width directions of the guide part were in close contact.

  According to a third aspect of the present invention, there is provided the lantern leg mounting structure according to the first or second aspect, wherein the leg-side locking portions are provided at the tip portions of a pair of side surfaces facing in the width direction in the leg insertion portion. The base-side locking portion is disposed opposite to the base receiving space at an angular interval of 180 degrees along the axial direction of the base portion. It is a latching piece which consists of a pair of plate-shaped elastic body extended. The pair of locking pieces are respectively fitted into the locking recesses at positions where the leg insertion portions are aligned with the locking recesses when the leg insertion portions are accommodated in the lower receiving space, and the leg insertion portions. A locking projection for locking is provided. The distance between the opposing side surfaces of the pair of locking pieces is such that when the leg insertion portion is inserted into the lower accommodating space of the base portion in the portion from the base end to the locking projection. In order not to elastically press the pair of side surfaces provided with the locking recesses of the leg insertion portion, the stop piece is set to have an interval greater than or equal to the interval between the pair of side surfaces providing the locking recesses of the leg insertion portion. Yes. Further, the pair of locking pieces has the leg insertion portion inserted into the lower receiving space of the base portion, and a portion of the leg insertion portion on the tip side of the locking recess contacts the locking projection. When overcoming the locking projection after coming into contact, it is elastically deformed in a direction away from each other in the lower housing space, and the portion on the tip side of the locking recess of the leg insertion portion is the locking projection. The leg insertion portion is elastically restored when a portion of the leg insertion portion on the tip side of the locking recess completely gets over the locking projection, and the locking projection is moved to the leg. By fitting into the locking recess of the insertion portion, the portion on the tip end side of the locking recess of the leg insertion portion abuts the locking projection until it completely gets over the locking projection The upper end surface of the leg on the outer periphery of the base end of the leg insertion portion collides with the lower end surface of the base portion to generate a striking sound within a distance range of It was so.

  According to a fourth aspect of the present invention, there is provided the lantern leg mounting structure according to the third aspect, wherein when the release portion is in the original position, the upper portion of the pair of locking pieces is spaced apart from the lower receiving space of the base portion. A pair of engaging portions facing each other in a state, and a pair of pressing protrusions protruding from the lower surfaces of the pair of engaging portions. The pair of engaging portions contact the upper ends of the pair of locking pieces when the release portion is moved from the original position to the lower release position via the connecting portion by a pressing operation of the pressing portion. The pair of locking pieces are elastically deformed outward. The pair of pressing protrusions are brought into contact with the upper end surface of the leg insertion portion by moving the releasing portion further downward from the releasing position via the connecting portion by a pressing operation of the pressing portion. The said leg insertion part is forcedly pushed out from the lower side accommodation space of the said base.

  The lantern leg mounting structure according to claim 5 is the structure according to any one of claims 1 to 4, wherein the base has a portion protruding upward from the upper surface of the base, and the radial direction of the base A pair of notches are arranged in parallel. The lantern leg mounting structure according to claim 5 is characterized in that the base portion has the inner space of the portion protruding upward from the upper surface of the base as the upper accommodation space, and the pressing portion is arranged in the upper accommodation space. Has been established.

  The holding member of the lantern leg attachment structure according to claim 6 is used in the lantern leg attachment structure in which the upper end portion of the leg is attached to the lower surface side of the base of the standing lantern. The lantern leg mounting structure holding member according to claim 6 is disposed at a leg mounting position on the base, has a cylindrical or columnar shape protruding upward from the upper end of the leg, and has a recess or A leg holding portion is provided that can hold a leg insertion portion having a leg-side locking portion formed of a convex portion. The leg holding portion has a cylindrical shape embedded in the base so that the axial direction is the thickness direction of the base, and an upper housing space disposed on the upper surface side of the base as an internal space A lower housing space disposed on the lower surface side of the base, and the lower housing space is formed into a space shape corresponding to the outer shape of the leg inserting portion, and the leg insertion portion can be inserted and received freely. A base that is disposed in the upper storage space of the base and can be moved up and down, and can be operated to be pushed down downward elastically, and the leg insertion portion in the lower storage space of the base. A leg-side locking portion of the leg insertion portion that is disposed in a portion corresponding to the leg-side locking portion when housed in the side housing space and the leg insertion portion is housed in the lower housing space. A base-side locking portion having a convex portion or a concave portion that locks in a concave-convex relationship, and inside the base portion The connecting portion connected to the pressing portion and the original position which is the upper position in the lower receiving space of the base portion, and the lowering is released from the original position via the connecting portion by the pressing operation of the pressing portion. A release portion that moves to a position and returns to the original position from the release position via the connecting portion when the push-down operation of the pressing portion is released. In the state where the leg insertion part is accommodated in the lower accommodation space, the release part is brought into the release position by a pressing operation of the pressing part, so that the leg side engagement part by the base side engagement part Release the lock.

  The lantern according to claim 7 includes a board-shaped base, a support column having a lower end portion detachably attached to the upper surface side of the base, a fire bag supported by the support column, and a lower surface side of the base table. A lantern-type lantern comprising a plurality of legs, the upper end of which is detachably attached, and a leg connector that spans and connects the plurality of legs. The lantern according to claim 7 includes a leg insertion portion disposed at an upper end of the leg as an upper end portion of the leg, and a leg insertion portion disposed at an attachment position of the leg on the base. And a leg holding part capable of holding the The leg insertion portion has a cylindrical or columnar shape protruding upward from the upper end of the leg, and has a leg-side locking portion including a concave portion or a convex portion on a side surface. On the other hand, the leg holding portion has a cylindrical shape embedded in the base so that the axial direction is the thickness direction of the base, and the upper housing is disposed as an internal space on the upper surface side of the base. A space and a lower housing space disposed on the lower surface side of the base, and inserting and housing the leg insertion portion with the lower housing space as a space shape corresponding to the outer shape of the leg insertion portion A base that can be freely moved; a pressing portion that is disposed in an upper accommodation space of the base and can be moved up and down; and can be elastically pushed downward; and the leg insertion portion in the lower accommodation space of the base. When the leg insertion portion is accommodated in the lower accommodation space, the leg insertion portion of the leg insertion portion is disposed at a position corresponding to the leg side latching portion, and when the leg insertion portion is accommodated in the lower accommodation space. A base side locking portion having a convex portion or a concave portion that locks the stop portion in a concave-convex relationship, and inside the base portion And a connecting portion connected to the pressing portion, and an original position that is an upper position in the lower accommodation space of the base portion, and a downward operation from the original position via the connecting portion by a pressing operation of the pressing portion. And a release portion that moves to the release position and returns to the original position from the release position via the connecting portion when the push-down operation of the pressing portion is released. In the state where the leg insertion part is accommodated in the lower accommodation space, the release part is brought into the release position by a pressing operation of the pressing part, so that the leg side engagement part by the base side engagement part Release the lock.

  The lantern leg mounting structure, the lantern leg mounting structure holding member and the lantern according to the present invention are a lantern type lantern, and when assembled, a plurality of legs can be easily and quickly attached to the base with one touch respectively. In addition, after mounting the legs on the base, it is possible to stably maintain the mounting state without rattling, while when disassembling the legs, a plurality of legs can be easily and quickly removed from the base with one touch.

FIG. 1 is a front view showing an overall structure of a lantern leg mounting structure, a holding member of the lantern leg mounting structure, and a lantern according to Embodiment 1 of the present invention. FIG. 2 is a bottom view showing a lantern leg mounting structure, a lantern leg mounting structure holding member, and a state in which the holding member is detached from the lantern base according to Embodiment 1 of the present invention. FIG. 3 is a plan view showing a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern base according to Embodiment 1 of the present invention. 4 is a bottom view showing a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern base according to Embodiment 1 of the present invention. FIG. FIG. 5 is a front view showing a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern base according to Embodiment 1 of the present invention. FIG. 6 is a perspective view showing a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern base according to Embodiment 1 of the present invention. FIG. 7 shows a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern first holding member according to Embodiment 1 of the present invention, in which (a) is a front view and (b) is a front view. (C) is a right side view, (d) is a left side view, and (e) is a plan view. FIG. 8 shows a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern first holding member according to Embodiment 1 of the present invention, in which (a) is a bottom view and (b) is a bottom view. It is a perspective view. FIG. 9 shows a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern second holding member according to Embodiment 1 of the present invention, in which (a) is a front view and (b) is a front view. (C) is a right side view, (d) is a left side view, and (e) is a plan view. FIG. 10 shows a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern second holding member according to Embodiment 1 of the present invention, in which (a) is a bottom view and (b) is a bottom view. It is a perspective view. 11 is a cross-sectional view taken along line AA in FIG. FIG. 12 shows the lantern leg mounting structure, the lantern leg mounting structure holding member, and the base and release members of the lantern holding member according to Embodiment 1 of the present invention. It is an exploded sectional view showing the internal structure of a base. FIG. 13 shows a lantern leg attachment structure, a lantern leg attachment structure holding member, and a state in which the leg is removed from the base of the lantern according to the first embodiment of the present invention, and the leg insertion part of the leg is enlarged. It is explanatory drawing shown. 14 shows a lantern leg mounting structure, a lantern leg mounting structure holding member, and a lantern leg and leg leg insertion portion according to Embodiment 1 of the present invention. FIG. (B) is a front view which shows the side surface which has the latching recessed part of a leg insertion part. FIG. 15 is a partial cross-sectional view showing the lantern leg mounting structure according to Embodiment 1 of the present invention, the holding member of the lantern leg mounting structure, and the operation of mounting the leg insertion portion of the lantern leg to the holding member. Yes, (a) shows a state where a part of the leg insertion portion is inserted into the holding member, and (b) shows a state where the leg insertion portion is further inserted into the holding member from (a). FIG. 16 is a partial cross-sectional view showing the lantern leg mounting structure according to Embodiment 1 of the present invention, the holding member of the lantern leg mounting structure, and the operation of mounting the leg insertion portion of the lantern leg to the holding member. (A) shows a state in which almost the entire leg insertion portion is inserted into the holding member, and (b) shows a state in which the leg insertion portion is attached to the holding member. FIG. 17 is a partial cross-sectional view illustrating the lantern leg mounting structure, the lantern leg mounting structure holding member, and the operation of removing the lantern leg leg insertion portion from the holding member according to Embodiment 1 of the present invention. (A) shows a state where the leg insertion part is mounted on the holding member, and (b) shows a state where the push button is pushed down and the leg insertion part is released from the holding member. FIG. 18 is a partial cross-sectional view illustrating the lantern leg mounting structure, the lantern leg mounting structure holding member, and the operation of removing the lantern leg leg insertion portion from the holding member according to Embodiment 1 of the present invention. (A) shows the state where the leg insertion part is pushed out by the release member in the holding member, and (b) shows the state where the leg insertion part is pulled out below the holding member. FIG. 19 is an explanatory view showing a state in which the leg is attached to the lantern leg attachment structure, the holding member of the lantern leg attachment structure, and the base of the lantern according to Embodiment 1 of the present invention. FIG. 20 is a plan view showing the lantern leg attachment structure, the holding member of the lantern leg attachment structure, and the operation of attaching the column to the base of the lantern according to Embodiment 1 of the present invention. FIG. 21 is a rear view showing the attachment structure of the lantern leg according to Embodiment 1 of the present invention, the holding member of the lantern leg attachment structure, and the operation of attaching the column to the base of the lantern. The column shows a state where the column is pressed closely, and (b) shows a state where the column is held and fixed to the base.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described. Throughout each embodiment, the same members, elements, or parts are denoted by the same reference numerals, and the description thereof is omitted.

Embodiment 1
The lantern leg connecting structure according to the first embodiment is applied to connect the legs of a lantern-type lantern 10 called an Ouchi lantern as shown in FIG. Specifically, the lantern 10 is attached and fixed to the upper surface side of the disk-shaped base 20 by detachably fitting the lower ends of the two columns 30. Further, a column coupler 35 called a cloud hand or a hand is spanned between the upper ends of the two columns 30 and is detachably fixed to couple the upper ends of both columns 30. In addition, at a position below the column coupler 35 at the upper end of the support column 30, the firing bag 40 is supported and deployed by the support column 30. In FIG. 1, in order to show the internal structure, the firing bag 40 is indicated by a virtual line. Further, although not shown, a socket, a light bulb, a rotating cylinder, and the like are attached to the upper surface side of the base 20 in the inside of the fire bag 40. On the other hand, the upper ends of the three legs 50 are attached and fixed to the lower surface side of the base 20 by fitting or the like. Each leg 50 has a shape (substantially S-shaped) that is inclined and spread outwardly from the upper end toward the lower end. Then, the mounting portions 72 of the leg coupler 70 are detachably mounted on the plurality of legs 50 so as to span between the plurality of legs 50 having the upper end portions attached to the base 20. In addition, holding members 60 serving as attachment parts are respectively provided at the connection positions of the leg couplers 70 in the three legs 50, that is, the attachment positions of the attachment parts 72 provided at the tips of the leg couplers 70. The The holding member 60 is provided at an intermediate portion in the length direction of the leg 50. In addition, although the said base 20, the support | pillar 30, the pillar coupling tool 35, the leg 50, and the leg coupling tool 70 are usually made of wood, they can also be formed of other materials.

[Base]
As shown in FIGS. 2 to 5, the base 20 has a disk shape, and a ring-shaped flange 21 is projected outwardly on the lower end side. A cylindrical outer peripheral surface above the flange 21 of the base 20 serves as a ring stopper 22 for fitting and fixing the lower ring 41 of the firing bag 40. A circular center hole 23 penetrating in the axial direction is formed at the center of the base 20. The base 20 is formed with a large-diameter hole 24 adjacent to the center hole 23 and communicating with the center hole 23. The center hole 23 and the large-diameter hole 24 of the base 20 are used for attaching a socket for supporting a light bulb. Column holes 25 (two in total) are formed on the left and right sides of the base 20, respectively. The two column holes 25 are disposed at positions that are opposed to each other in the radial direction or the radial direction with the center hole 23 as a center, and are disposed at a position radially inward from the wheel stopper portion 22 of the base 20 by a predetermined distance. Yes. That is, the two pillar holes 25 are on a virtual circle or circumference (hereinafter referred to as “virtual circumference”) at a position that is a predetermined distance in the radial direction from the ring stopper portion 22 of the base 20. They are arranged at an angular interval of 180 degrees. Each column hole 25 is a circular (cylindrical) through-hole having a predetermined diameter and extending in the thickness direction from the upper surface to the lower surface of the base 20. Further, a total of three leg holes 26 are formed on the front side, the right rear side, and the left rear side of the base 20, respectively. The three leg holes 26 are arranged at a position on the inner side by a predetermined distance in the radial direction from the wheel stopper 22 of the base 20 in the same direction as the pillar holes 25. That is, the three leg holes 26 are arranged at an angular interval of 120 degrees on the virtual circumference at a position that is a predetermined distance in the radial direction from the ring stopper portion 22 of the base 20. In this way, the two column holes 25 and the three leg holes 26 are arranged at positions on the same circumference in the circumferential direction of the base 20. Each leg hole 26 is a circular (columnar) through-hole having a predetermined diameter extending through the base 20 from the upper surface to the lower surface in the thickness direction.

  Here, the right pillar hole 25 and the right rear leg hole 26 are disposed adjacent to each other, and the space (opposing portion) between them is communicated with each other by the communication hole 27, so that the thickness of the base 20 is increased. An odd-shaped integral through hole having the same cross section in the direction is formed. That is, the right column hole 25 and the right rear leg hole 26 are communicated with each other through the communication hole 27, and the first holding holes 25, 26, 27 are formed as through holes having a substantially glasses-shaped cross section as a whole. Is configured. Similarly, the left column hole 25 and the left rear leg hole 26 are arranged adjacent to each other, and the space between them (opposite portion) is communicated with each other by the communication hole 27, so that the cross section has a substantially glasses shape as a whole. The first holding holes 25, 26, and 27 are formed as through holes. Further, the communication holes 27 are also arranged on the same circumference as the column holes 25 and the leg holes 26. As a result, the first holding holes 25, 26, 27 are formed on the virtual circumference in plan view. An arc shape with a predetermined angle extending along the arc (an arc shape extending from the first holding hole 25 to the second holding hole 26) is formed. The upper leg hole 26 is formed as a single through hole and constitutes a second holding hole. Further, on the back surface side (lower surface side) of the base 20, both ends of the first holding holes 25, 26, 27, that is, outside the arc direction that is the non-connecting side of the column hole 25 and the leg hole 26 are provided. The housing recesses 28 and 29 each having a semi-elliptical flat plate-like shallow recess shape are continuously formed integrally with the outer periphery of the column hole 25 and the leg hole 26. The housing recesses 28 and 29 are formed so as to extend along an extension line of an arc drawn by the first holding holes 25, 26 and 27. Similarly, on the back surface side (lower surface side) of the base 20, the receiving recesses 28 and 29 are provided on the outer periphery of the leg hole 26 on both sides in the radial direction of the leg hole 26 as the second holding hole, respectively. It is integrally formed continuously. The accommodation recesses 28 and 29 of the second holding hole 26 are arranged so as to draw a circular arc continuous to the second holding hole 26 in the same manner as the arrangement of the accommodation recesses 28 and 29 with respect to the first holding holes 25, 26 and 27. Has been. As described above, the first holding holes 25, 26, 27 and the accommodating recesses 28, 29 and the second holding hole 26 and the accommodating recesses 28, 29 are all arranged on the virtual circumference. Yes.

[First holding member]
As shown in FIG. 6, the first holding member 100 is accommodated and fixed in the pair of left and right first holding holes 25, 26, and 27 of the base 20. The first holding member 100 has a substantially glasses-like shape in which a pair of substantially cylindrical bodies are connected in a standing manner so that their axes are parallel to each other, corresponding to the first holding holes 25, 26, 27. It has an irregular continuous tube shape. Specifically, the first holding member 100 includes a column holding unit 110, a leg holding unit 130, and a connecting unit 120 that connects the column holding unit 110 and the leg holding unit 130 to each other. The column holding part 110 has the same outer shape as the column hole 25 and has a cylindrical shape with the same outer diameter as the diameter of the column hole 25. The leg holding portion 130 has the same outer shape as the leg hole 26 and has a cylindrical shape with the same outer diameter as the leg hole 26. The connecting portion 120 has the same outer shape as the connecting hole 27 and extends in the axial direction (thickness direction of the base 20) with the same cross-sectional shape as the connecting hole 27. Further, the connecting portion 120 is disposed between the column holding portion 110 and the leg holding portion 130 so as to have the same positional relationship or positional relationship as the positional relationship or positional relationship of the connecting hole 27 with respect to the column hole 25 and the leg hole 26. It is arranged. Thereby, the column holding part 110 and the leg holding part 130 correspond to the arc shape of a predetermined angle which is the arrangement mode of the first holding holes 25, 26, 27 in the plan view via the connecting part 120. It has an arc shape with a predetermined angle. Further, as shown in FIG. 3, the both ends of the first holding member 100, that is, both ends in the arc direction on the non-connecting side of the column holding part 110 and the leg holding part 130 are respectively semi-elliptical flat plate-like. Fixing portions 125 and 126 having a protruding piece shape are integrally formed. The fixing portions 125 and 126 are formed so as to extend along an extension line of an arc drawn by the column holding portion 110, the connecting portion 120, and the leg holding portion 130. The fixing portions 125 and 126 have an insertion hole (not shown) penetratingly formed in the center portion. The arrangement of the fixing portions 125 and 126 in the first holding member 100 is the same as the arrangement of the receiving recesses 28 and 29 with respect to the first holding holes 25, 26 and 27.

[Column holding part]
As shown in FIGS. 4 to 6, the column holding portion 110 includes a cylindrical base portion 111 having the same height as the thickness of the ring stopper portion 22 of the base 20 and is inserted into the column hole 25 of the base 20. In this case, the upper end surface and the lower end surface of the base 111 of the column holding unit 110 are flush with the upper surface and the lower surface of the ring stopper 22 of the base 20, respectively. A pair of left and right hollow walls 112 are integrally formed in the base 111 of the column holding part 110 so as to form a shaft insertion part 113 and a pair of upper and lower convex part insertion parts 114. Specifically, each of the pair of hollow walls 112 has a shape in which a partition wall is provided in the center of the arc direction of the substantially semicircular hollow wall (having two substantially quadrant arc-shaped spaces), and the radiation of the base 111 is provided. Oppositely arranged on both sides of the direction. Further, the hollow wall 112 extends from the upper end surface of the base 111 downward by a predetermined distance (by a distance of about 1/3 of the height of the base 111). That is, the lower side of the hollow wall 112 in the base 111 has a simple circular cross-sectional shape. Accordingly, a small circular shaft insertion portion 113 formed between the inner surfaces of the hollow wall 112 is formed concentrically on the upper side of the base portion 111, and a pair of radial insertion portions of the shaft insertion portion 113 are disposed on both sides in the radial direction. A convex portion insertion portion 114 having a narrow linear strip shape is formed. The pair of convex portion insertion portions 114 extend along the arc direction of the first holding member 100 (a direction perpendicular to the radial direction of the base 20).

[Leg holder]
As shown in FIGS. 4 to 7, the leg holding portion 130 includes a cylindrical base portion 131 having a height larger than the column holding portion 110 by a predetermined dimension, and is inserted into the leg hole 26 of the base 20. The lower end surface of the base portion 131 of the leg holding portion 130 is flush with the lower surface of the wheel stopper portion 22 of the base 20, and the upper end surface of the base portion 131 is the predetermined dimension from the upper surface of the wheel stopper portion 22 of the base 20. It protrudes upward (that is, it protrudes upward from the upper surface of the base 20 by the predetermined dimension). Accordingly, the base 131 of the leg holder 130 protrudes upward from the base 111 of the column holder 110 by the predetermined dimension (predetermined protrusion dimension) in a state where the holding member 110 is mounted on the base 20. ing. A pair of left and right support protrusions 132 are integrally formed on the upper end portion of the base 131 along the circumferential direction of the disk-shaped base 20 (on the virtual circle). Thus, a pair of front and rear cutouts 133 are formed and disposed between the pair of support protrusions 132 along the radial direction of the base 20. Each support protrusion 132 has a rounded rectangular shape with a predetermined height in which both left and right corners of the upper end are rounded. Correspondingly, each notch 133 extends downward from the upper end surface of the base 131. A concave shape extending by the predetermined height is formed. The heights of the support protrusions 132 and the notches 133 of the leg holder 130 are smaller than the projecting dimension of the leg holder 130 from the column holder 110 (preferably about 1/2 to 1/3). )). Moreover, it is preferable that the circumferential length of the recess 133 of the leg holding unit 130 is long enough to accommodate a normal human fingertip portion (particularly the main portion of the first finger of the thumb).

[Removal mechanism]
As shown in FIGS. 8 to 9, attachment / detachment mechanisms 140, 150, 160, and 170 are disposed inside the base 131 of the leg holding unit 130, and the upper end of the leg 50 is pushed in by one-touch operation (push operation). In addition to being freely attachable, it can be removed with a single touch by a button pressing operation (push operation). The attachment / detachment mechanism includes a push button 140, a guide portion 150, a locking piece 160, and a release member 170. Specifically, a partition wall 135 extending in the horizontal direction (on a plane parallel to the base 20) is integrally formed at a position further below the lower end of the notch 133 in the base 131. A small-diameter circular insertion hole 136 is formed at the center of the partition wall 135. The partition wall 135 is disposed at a position slightly above the upper surface of the base 20 when the base 131 is attached to the base 20. In addition, the space above the partition wall 135 in the base 131 is an upper accommodation space, and the push button 140 is accommodated and disposed in the upper accommodation space so as to be coaxial. As shown in FIGS. 10 to 11, the push button 140 includes a pressing portion 141 having a bottomed short cylindrical shape with a circular opening at the lower end. The upper end surface of the pressing portion 141 is preferably subjected to anti-slip processing such as knurling for the purpose of preventing the user's finger from slipping during pressing. In addition, a shaft fixing portion 142 having a small-diameter cylindrical shape is integrally formed at the center portion of the disc-shaped bottom wall of the pressing portion 141 so as to protrude downward so as to be coaxial with the pressing portion 141. Thereby, an annular storage space is formed between the peripheral wall (side wall) of the pressing portion 141 of the push button 140 and the shaft fixing portion 142. In the accommodation space of the push button 140, an urging member 143 made of a pressing coil spring is accommodated. The outer diameter of the pressing portion 141 of the push button 140 is slightly smaller than the inner diameter of the base portion 131 of the leg holding portion 130, and the height of the pressing portion 141 is a portion above the partition wall 135 of the base portion 131 (pushing). The height is set to be smaller than the height of the accommodation space of the button 140 by a predetermined dimension.

[Guide 150]
As shown in FIG. 12, the space below the partition wall 135 in the base 131 is a lower housing space, and a guide portion 150 and a pair of front and rear locking pieces 160 are integrally formed in the lower housing space. In addition, the release member 170 is accommodated and arranged so as to be coaxial. First, the guide part 150 will be described. On the inner peripheral surface of the base 131 in the lower accommodation space, flat support walls 154 are provided in the angular range corresponding to the pair of support protrusions 132, respectively. Are opposed to each other in the diametrical direction and extend parallel to each other. The support wall 154 extends the entire length of the lower accommodation space from the lower end of the base 131 to the partition wall 135. Further, the support wall 154 is arranged to form a chord for an arc having an angular range corresponding to the support protrusion 132. A pair of guide protrusions are provided on the inner surface of the support wall 154 in an angle range corresponding to the support protrusion 132 (more precisely, on both sides of a predetermined width region corresponding to the center in the width direction of the support protrusion 132). 151 is integrally formed. In other words, the pair of guide protrusions 151 are arranged on the inner peripheral surface of the base 131 at positions opposite to the 180 degrees (left and right positions facing each other in the diameter direction) via the support wall 154. The guide protrusion 151 has a linear rib shape having a rectangular cross section with a predetermined protrusion height extending in the axial direction of the base portion 131. The pair of guide protrusions 151 are arranged side by side so as to extend in the axial direction of the base 131 with a predetermined interval in the width direction. As a result, a guide groove extending linearly along the axis of the lower accommodation space of the base 131 is formed between the inner side surfaces (opposing side surfaces) of the pair of guide protrusions 151 and the inner side surface of the support wall 154. Yes. The guide protrusion 151 is extended downward from the partition wall 135 by a predetermined distance (a distance of about 1/5 of the axial length of the lower accommodation space) on the support wall 154. In addition, on the inner side surface of the support wall 154 provided on the inner peripheral surface of the base portion 131, a sliding contact projection 152 is integrally formed at the center in the width direction of the guide groove between the pair of guide projections 151. The slidable contact protrusion 152 has a linear rib shape with a rectangular cross section with a predetermined protrusion height extending in the axial direction of the base 131 so as to be parallel to the guide protrusion 151. That is, the sliding contact protrusion 152 is disposed so as to extend along the axial direction (the center line in the width direction) of the guide groove. The protruding height of the sliding contact protrusion 152 is set to be smaller than the protruding height of the guide protrusion 151, and is preferably set to a height of about 1/3 to 1/2. The sliding contact protrusion 152 extends downward from the partition wall 135 by the same length (same axial length) as the guide protrusion 151.

  On the inner side surface of the support wall 154 on the inner peripheral surface of the base 131, extension protrusions 153 are formed integrally with the pair of guide protrusions 151, respectively. Each of the pair of extension protrusions 153 has a linear rib shape having a rectangular cross section with a predetermined protrusion height extending in the axial direction of the base portion 131. The protrusion height of the extension protrusion 153 is set to be smaller than the protrusion height of the guide protrusion 151, and is preferably set to a height of about 1/3 to 1/2. The extension protrusion 153 extends downward from the tip (lower end) of the guide protrusion 151 to the lower end of the base 131. The extension protrusion 153 extends so as to be collinear with the guide protrusion 151. That is, like the pair of guide protrusions 151, the pair of extension protrusions 153 are also arranged on the inner peripheral surface of the base 131 at positions 180 degrees opposite to each other (left and right positions facing the diameter direction) via the support wall 154. Yes. The extension protrusions 153 are arranged side by side so as to extend in the axial direction of the base 131 with a predetermined interval in the width direction. Thus, a guide groove that extends linearly along the axis of the lower accommodation space of the base 131 is formed between the inner surface of the pair of extension protrusions 153 and the inner surface of the support wall 154. Here, the pair of guide protrusions 151 (and their guide grooves) function as release member guide means for guiding the upward and downward movement of the release member 170, and the pair of extension protrusions 153 (and their guide grooves) are legs to be described later. It functions as a leg insertion portion guide means for guiding an operation (vertical movement) when the 50 upper leg insertion portion 210 is inserted into or removed from the lower accommodation space of the base 131. Further, the pair of extension protrusions 153 also function as a restricting means for preventing the leg insertion portion 210 from rattling or misalignment when the leg insertion portion 210 is inserted into the lower accommodation space of the base portion 131 and fixed. .

[Locking piece 160]
Next, the pair of locking pieces 160 are integrally formed at the same angular position as the notch 133 (more precisely, the center position in the width direction of the notch 133) on the inner peripheral surface of the base 131 in the lower accommodation space. It is arranged. In other words, the pair of locking pieces 160 are disposed at positions on the inner circumferential surface of the base 131 that are opposite to each other by 180 degrees (front and rear positions that face each other in the diameter direction). Specifically, the locking piece 160 includes an elastic portion 161 that linearly extends upward along the axial direction from the lower end of the inner peripheral surface of the base portion 131. That is, the lower end of the elastic portion 161 is fixed integrally to the lower end of the inner peripheral surface of the base portion 131, and a substantially constant gap is provided between the elastic portion 161 and the inner peripheral surface of the base portion 131 along the axial direction of the base portion 131. (In a state where it is slightly lifted inward from the inner peripheral surface) in an upward direction. The elastic portion 161 has a predetermined elasticity, and is elastically deformable in the radial direction from the original position (inelastically deformed state) toward the inner peripheral surface of the base 131 by an external force. When the external force is released, It returns to its original position by its own elastic return force. The length (axial length) of the elastic portion 161 is set so that the upper end of the elastic portion 161 is positioned above the lower end of the guide projection 151 by a predetermined distance. In addition, a tip end portion (upper end portion) on the surface side of the elastic portion 161 (side facing the center of the base portion 131) is a curved inclined surface 162. Further, a locking projection 163 is integrally formed at a predetermined height position in the lengthwise central portion (vertical central portion) on the surface side (inner surface side) of the elastic portion 161 so as to protrude at a predetermined protruding height. Yes. The locking projection 163 has a horizontally-long rectangular block shape in plan view, and is disposed on the elastic portion 161 so that its upper end surface is located at a predetermined height in the base 131. Specifically, the locking projection 163 has a cross-sectional shape in which the upper end surface is a flat surface and at least the lower end surface is an inclined surface that is inclined outward (in the direction toward the elastic portion 161) downward. ing.

[Release member 170]
Next, the release member 170 includes a connecting shaft 171 and a seat portion 172. The connecting shaft 171 has a columnar shape or a rod shape (substantially the same diameter) that can be inserted into the insertion hole 136 of the partition wall 135 of the base 131. The connecting shaft 171 is inserted into the insertion hole 136 of the partition wall 135, and a predetermined length portion (approximately ½ axial length portion) on the upper end side of the push button 140 accommodated in the upper accommodation space of the base portion 131. The shaft is fixedly inserted into the shaft fixing portion 142. At this time, the biasing member 143 accommodated in the accommodation space of the push button 140 surrounds the outside of the exposed portion of the connecting shaft 171. The seat portion 172 has a short cylindrical shape or an annular shape larger than the connecting shaft 171 and is integrally formed coaxially with the lower end of the connecting shaft 171. When the connecting shaft 171 is inserted into the insertion hole 136 of the partition wall 135 and fixed to the push button 140, the pressing portion 141 is urged in the direction away from the partition wall 135 by the pressing urging force of the urging member 143, and the shaft fixing portion The upper end surface of the seat portion 172 is brought into pressure contact with the peripheral edge portion of the insertion hole 136 on the lower surface of the partition wall 135 via the connecting shaft 171 fixed to the 142. In the release member 170, release portions 173, 174, and 176 are integrally formed at the lower end of the seat portion 172. The release parts 173, 174, 176 are composed of a guided part 173, an engaging part 174, and a pressing protrusion 176.

[Guided part 173]
Specifically, the guided portion 173 has a rectangular parallelepiped rod shape with a rectangular cross section, and is integrally formed with its central portion fixed to the lower end of the seat portion 172. The length of the guided portion 173 is the same as the distance between the opposing surfaces of the sliding protrusions 152 of the pair of guide portions 150 arranged at the opposing positions in the diameter direction in the lower accommodation space of the base portion 131. The width of the guided portion 173 (the dimension in the width direction in plan view) is the same as the width between the pair of guide protrusions 151 of each guide portion 150 (that is, the width of the guide groove). As a result, when the connecting shaft 171 is inserted into the insertion hole 136 of the partition wall 135 and fixed to the push button 140, both ends in the length direction of the guided portion 173 are opposed to each other in the diametrical direction in the lower accommodation space of the base 131. The guide grooves 150 of the pair of guide portions 150 (grooves formed between the pair of guide protrusions 151 of each guide portion 150) can be slidably accommodated. Then, when both ends in the length direction of the guided portion 173 are accommodated in the guide grooves of the guide portion 150 and attached, they are accommodated between both ends in the length direction of the guided portion 173 (between the pair of guide protrusions 151 of the guide portion 150). And both end surfaces of the guided portions 173 are slidable projections of the pair of guide portions 150, respectively. As the release member 170 reciprocates in the axial direction, both side surfaces in the length direction of the guided portion 173 are guided by the pair of guide projections 151 (that is, the guide projections 151). The guide grooves are guided in the vertical direction by sliding the inner surface of 151, and the end surfaces at both ends of the guided portion 173 are the opposing surfaces (base portions) of the sliding contact projections 152 of the pair of guide portions 150, respectively. At the center or axis of 131 It is adapted to slide within the side) on Cow. At this time, the seat portion 172 is pressed against the lower surface of the partition wall 135 via the connecting shaft 171 by the pressing biasing force of the biasing member 143, so that the guided portion 173 is at the uppermost position (the lower surface of the partition wall 135 by the thickness of the seat portion 172). In a state of being arranged downward from). That is, at this time, the guided portion 173 is disposed at the uppermost position in the guide groove of the guide portion 150. The guided portion 173 has at least a front end portion accommodated and mounted in a space between the pair of guide protrusions 151 (guide grooves) of each guide portion 150 having a width substantially the same as the width between the pair of guide protrusions 151. Any configuration other than those described above can be used as long as it can be guided along the guide groove. For example, the guided portion 173 has a bar shape with the same cross-sectional shape as a whole, and only the tip portion is mounted in the guide groove of the guide portion 150 so that it can be guided and moved (slidable). The part can also have a different shape.

[Engagement part 174]
The engaging portion 174 includes a support portion 174a that is a rectangular parallelepiped rod-shaped portion having a rectangular cross section, and an engagement protrusion 174b that is formed by bending both ends of the support portion 174a downward at an angle of about 90 degrees. As shown in the figure, it has a substantially channel-like rod shape that releases the lower part. The engaging portion 174 is integrally formed so as to connect the center portion of the support portion 174 a with the center portion of the guided portion 173 so as to extend perpendicularly to the guided portion 173. That is, the guided portion 173 and the engaging portion 174 have a cross shape in plan view as a whole. In addition, curved sliding surfaces 175 having a predetermined curvature are formed at the corners on the lower surface side of the engaging protrusions 174 at both ends of the engaging portion 171. As a result, the connecting shaft 171 is inserted into the insertion hole 136 of the partition wall 135 and fixed to the push button 140, and both the lengthwise ends of the guided portion 173 are accommodated in the guide groove of the guide portion 150 so as to be within the guide groove. When arranged at the uppermost position, the sliding surface 175 of the engaging portion 174 is arranged at a position spaced by an angular interval of 180 degrees in the diametrical direction within the lower accommodation space of the base portion 131, and the pair of guide portions 150. With respect to the inclined surface 162 of the pair of locking pieces 160 arranged at an angular interval of 90 degrees, the contact state is brought about. That is, in a state where the seat portion 172 is pressed against the lower surface of the partition wall 135 via the connecting shaft 171 by the pressing biasing force of the biasing member 143 (original position of the release portion), the engaging portion 174 is at the uppermost position (seat portion 172). In the state of being disposed below from the lower surface of the partition wall 135 by the thickness of the above. That is, at the uppermost position of the engaging portion 174, the engaging protrusion 174 b of the engaging portion 174 is in contact with the sliding surface 175 of the engaging portion 174 against the inclined surface 162 of the locking piece 160. The height (exactly, the dimension from the upper end surface of the engaging protrusion 174b to the sliding surface 175) is set. Here, the length of the engaging portion 174 (the dimension between the outer surfaces of the engaging protrusions 174b on both sides) is a predetermined dimension than the dimension between the inner surfaces (opposing side surfaces) of the pair of locking pieces 160 in the base 131. The dimensions are only large. Specifically, the length of the engagement portion 174 is the original position of the release portion, and the outermost end of the engagement protrusion 174b is located on the outer side in the radial direction of the base 131 from the inner surface of the locking piece 160. The sliding surface 175 is set to such a length as to contact the inclined surface 162 of the locking piece 160. Preferably, the length of the engaging portion 174 is longer than the dimension between the inner side surfaces of the pair of locking pieces 160 by about 1/1 to 1/2 of the thickness dimension of the locking piece 160. Yes. It should be noted that the length of the engaging portion 174 and the height of the engaging protrusion 174b can be set so that the pair of locking pieces 160 are in close proximity with each other at the original position of the release portion. .

[Pressing protrusion 176]
Further, the pressing protrusions 176 are integrally formed on the lower end surfaces of the engaging protrusions 174b at both ends of the engaging part 174 so as to protrude downward. The pressing protrusion 176 has a small-thick protrusion that protrudes downward from the inner edge side of the lower end surface of the engaging protrusion 174b.

[Second holding member]
A second holding member 180 is housed and fixed in the column hole 26 as the second holding hole of the base 20. The second holding member 180 is obtained by integrally forming the fixing portions 125 and 126 on both sides of the leg holding portion 130 having the same configuration as the leg holding portion 130 of the first holding member 100. In other words, the second holding member 180 has a configuration in which the column holding part 110 and the connecting part 120 are omitted from the first holding member 100 and only the leg holding part 130 is left. Therefore, the leg holding portion 130 of the second holding member 180 has the same outer shape as the leg hole 26 and has a cylindrical shape with the same outer diameter as the diameter of the leg hole 26. The fixing portions 125 and 126 are formed on both sides of the leg holding portion 130 so as to extend along an extension line of the arc drawn by the above. In addition, since the internal structure of the leg holding part 130 of the 2nd holding member 180 is the same as the internal structure of the leg holding part 130 of the 1st holding member 100, description is abbreviate | omitted.

[Fixing of holding member]
The first holding member 100 accommodates the column holding part 110 and the leg holding part 130 by inserting them into the column hole 25 and the leg hole 26 from the lower surface side of the base 20, respectively, and fixing the fixing parts 125 and 126 to the base. 20 are inserted into the receiving recesses 28 and 29, and a fastening member 127 such as a screw is inserted into the insertion holes of the fixing portions 125 and 126, respectively, and is screwed into the base 20, so that the fixing portions 125 and 126 and It is fixed at a fixed position of the base 20 via the fastening member 127. Similarly, the second holding member 180 accommodates the leg holding part 130 by inserting it into the leg hole 26 from the lower surface side of the base 20, and the fixing parts 125, 126 in the receiving recesses 28, 29 of the base 20. The base 20 is fixed through the fixing portions 125 and 126 and the fastening member 127 by placing the fastening members 127 through the insertion holes of the fixing portions 125 and 126 and screwing them into the base 20. Fixed in position. At this time, the lower surfaces of the first holding member 100 and the second holding member 180 are both flush with the lower surface of the base 20. Further, the upper end surface of the column holding portion 110 of the first holding member 100 is also flush with the upper surface of the base 20. On the other hand, in both the first holding member 100 and the second holding member 180, the leg holding portion 130 protrudes upward by a predetermined distance from the upper surface of the wheel stopper portion 22 of the base 20. At this time, the first holding member 100 having a flat arc shape as a whole and the second holding member 180 having a flat arc network as a whole are arranged at predetermined intervals on the virtual circle in the base 20. On the upper surface side of the base 20, the pair of notches 133 of each leg holding part 130 are arranged side by side in the radial direction of the base 20. Further, on the lower surface side of the base 20, the guide part 150 of each leg holding part 130 is arranged on the virtual circle in the base 20, while the locking piece 160 of each leg holding part 130 is arranged on the base 20. Are arranged so as to face each other in the diameter direction extending orthogonal to the virtual circle.

[Leg insertion part 210]
As shown in FIGS. 13 to 15, the leg insertion portion 210 is fixed to the innermost position on the flat surface 51 at the upper end of the leg 50. The leg insertion part 210 has a substantially quadrangular prism shape that can be accommodated by being inserted into the lower accommodation space of the leg holding part 130. Specifically, the leg insertion portion 210 corresponds to a rectangular parallelepiped space having a substantially rectangular cross section formed by the pair of guide portions 150 and the pair of locking pieces 160 in the lower housing space of the leg holding portion 130. It has a substantially rectangular column shape (substantially rectangular column shape).

[Guide groove 211]
Specifically, on the left and right side surfaces of the leg insertion part 210, a pair of guide grooves 211 are arranged in parallel so as to extend in the length direction of the leg insertion part 210 with a gap in the width direction. Is formed. The pair of guide grooves 211 are formed at positions corresponding to the pair of extension protrusions 153 of the leg holding portion 130. As shown in the enlarged view of the leg insertion portion 210 in FIG. 15 (portion surrounded by a one-dot chain line circle), each of the pair of guide grooves 211 is linear in the length direction of the leg insertion portion 210 in plan view. It has an elongated inverted trapezoidal shape extending in the direction. That is, each guide groove 211 has a width on the upper end side larger than a width on the lower end side, and the width of the upper end (maximum width) is larger than the width of the lower end (minimum width) by a predetermined ratio (for example, 15 to 15). 25% larger width). Further, in the present embodiment, for simplification of illustration, in the drawings other than the enlarged views of FIGS. 14 and 15, the leg insertion portion 210 is drawn as a simple quadrangular prism shape that is not tapered. In other words, the leg insertion part 210 has a tapered quadrangular prism shape that is slightly tapered toward the tip (upper end) (for example, the width is reduced by about 5 to 10%). Further, the left and right widths (width dimensions of the left and right side surfaces) and the front and rear widths (width dimensions of the front and rear side surfaces) of the leg insertion portion 210 are the same, and both the left and right side surfaces and the front and rear side surfaces are similarly directed toward the upper end. It has a tapered rectangular shape that is slightly tapered. The pair of guide grooves 211 are extended so that the respective axis centers (center lines in the width direction) are parallel to the axis centers (center lines in the width direction) of the leg insertion portions 210. The insertion portion 210 extends in the height direction. In addition, the protruding portion 212 of the leg insertion portion 210 formed between the pair of guide grooves 211 constitutes a reference surface (a surface that is flush with the surface before the guide groove 211 is formed) of the left and right sides of the leg insertion portion 210. However, it has a trapezoidal shape in plan view corresponding to the shape of the pair of guide grooves 211.

[Relationship between guide groove 211 and extension protrusion 153]
Since the pair of guide grooves 211 extend from the lower end to the upper end of the leg insertion part 210, the height thereof is the same as the height of the leg insertion part 210 (the height dimension between the upper and lower ends). Further, the height of the leg insertion portion 210 (and the height of the guide groove 211) is set to a height that is smaller than the height of the pair of extension protrusions 153 of the leg holding portion 130 by a predetermined dimension. That is, while the leg insertion part 210 is completely accommodated in the lower accommodation space of the leg holding part 130, the extension protrusion 153 is completely accommodated in the guide groove 211, while the upper end of the leg insertion part 210 is (The upper end portion of the guide groove 213) and the corresponding portion of the extension projection 153 are set so that the gap of the predetermined dimension remains. On the other hand, the pair of extension protrusions 153 are arranged in parallel to each other, and the width dimension of each extension protrusion 153 is the same from the upper end to the lower end. Thereby, the interval (arrangement interval) between the pair of extension projections 153 is also the same from the upper end to the lower end. The arrangement interval of the pair of extension projections 153 is the same as the arrangement interval of the pair of guide grooves 211. The minimum lower end arrangement interval (that is, the width of the lower end of the raised portion 212) is the same or slightly larger (for example, larger by 20 to 30%). The width of each extension protrusion 153 is the same in the length direction, but the width of each guide groove 211 is from the upper end to the lower end so that the upper end is the maximum width and the lower end is the minimum width as described above. Gradually decreasing. Note that the width of the extension protrusion 153 is the same as or slightly smaller than the minimum width of the lower end of the guide groove 211 (for example, a dimension smaller by 20 to 30%). Thereby, when the leg insertion part 210 is inserted into the lower accommodating space of the leg holding part 130, first, the upper end of the guide groove 211 of the leg insertion part 210 is fitted to the lower end of the extension protrusion 153, and the insertion starts. However, at this time, the lower end portion of the extension protrusion 153 is fitted within the upper end portion of the guide groove 211 with a certain margin in the width direction. When the leg insertion part 210 is sequentially inserted into the back side (upper end side) of the lower housing space of the leg holding part 130, the margin in the width direction between the extension protrusion 153 and the guide groove 211 is gradually reduced. Finally, in a state where the leg insertion part 210 is completely accommodated in the lower accommodation space of the leg holding part 130 (a state shown in the enlarged view of the leg insertion part 210 in FIG. 15), the extension protrusion 153 and the guide are guided. The margin in the width direction with respect to the groove 211 is minimized, and the extension protrusion 153 is in the guide groove 211 at the lower end portion (base end portion) of the leg insertion portion 210 in the width direction in a substantially close state or a close fit state. The movement to is prevented.

  That is, when the arrangement interval between the pair of extension projections 153 is the same as the arrangement interval between the lower ends of the pair of guide grooves 211, at least the inner edge portion of the pair of extension projections 153 is the opposite side surface of the guide groove 211 (ie, the raised portion). And the holding force of the leg insertion part 210 with respect to the leg holding part 130 is increased. Note that the arrangement interval between the pair of extension projections 153 can be slightly smaller than the arrangement interval between the lower ends of the pair of guide grooves 211. In this case, at least the inner edges of the pair of extension projections 153 are the guide grooves. 211 is completely in close contact with the opposite side surface of 211, and is in a pressure-contact state by a small arrangement interval, further increasing the holding force of the leg insertion part 210 with respect to the leg holding part 130. Further, even when the width of the extension protrusion 153 is the same as the minimum width of the lower end of the guide groove 211, both side surfaces of the lower end of the extension protrusion 153 are in close contact with both side surfaces of the lower end of the guide groove 211. The holding power of the leg insertion part 210 is increased. It is possible to make the width of the extension protrusion 153 slightly smaller than the minimum width of the lower end of the guide groove 211, but in this case also, the lower end side surfaces of the extension protrusion 153 are pressed against the lower end side surfaces of the guide groove 211. Thus, the holding force of the leg insertion part 210 with respect to the leg holding part 130 is further increased. Further, by making the arrangement interval and width of the extension protrusions 153 the same or slightly smaller than the arrangement interval and width of the lower end of the guide groove 153, a synergistic effect of the above effects can be exhibited. Even when the arrangement interval between the pair of extension protrusions 153 is slightly larger than the arrangement interval between the lower ends of the pair of guide grooves 211, or when the width of the extension protrusion 153 is slightly larger than the minimum width of the lower ends of the guide grooves 211, The extension protrusion 153 is substantially in close contact with the guide groove 211 at the lower end portion of the leg insertion portion 210, and the same effect is exhibited in that the holding force of the leg insertion portion 210 with respect to the leg holding portion 130 is increased.

[Locking recess 214]
A pair of locking recesses 214 are formed on the front and rear side surfaces of the leg insertion portion 210 so as to face each other in the front-rear direction of the leg insertion portion 210. The pair of locking recesses 214 are formed at positions corresponding to the locking protrusions 163 of the pair of locking pieces 160 of the leg holding unit 130. As shown in FIG. 14, the locking recess 214 has the same cross-sectional shape with a horizontally-long rectangular cross section, is located at a position below the upper end of the leg insertion part 210 by a predetermined distance, and before and after the leg insertion part 210. It is arranged at the center in the width direction of the side surface. The width of the locking recess 214 (left-right dimension in FIG. 14) is the same as the width of the locking projection 163 (left-right dimension in FIG. 14). On the other hand, the height of the locking recess 214 is larger than the height of the locking protrusion 163 (for example, a size of about 1.25 to 1.75 times, usually a size of about 1.5 times). Yes. Further, the depth of the locking recess 214 is set to be substantially the same as the protruding height of the locking protrusion 163. Further, in a state where the leg insertion part 210 is completely accommodated in the lower accommodation space of the leg holding part 130, the latching protrusion 163 is completely accommodated and arranged on the upper end side of the latching recess 214. The arrangement relationship is set so that the upper end surface of 163 is in close contact with the upper end wall surface of the locking recess 214 and the left and right side surfaces of the locking protrusion 163 are in close contact with the left and right wall surfaces of the locking recess 214. Has been. A pair of guide surfaces 213 are formed on the front and rear side surfaces of the leg insertion portion 210 at portions above the pair of locking recesses 214, respectively. The guide surface 213 extends from the upper end of the locking recess 214 to the upper end of the leg insertion portion 210 so as to have the same width as the locking recess 214 at the center in the width direction of the leg insertion portion 210. It has a horizontally long rectangular shape. That is, the pair of guide surfaces 213 are inclined upwardly from the reference surface at the upper end of the locking recess 214 (a surface flush with the front and rear side surfaces of the leg insertion portion 210) to the inner side of the leg insertion portion 210 and extend upward. In the pair of guide surfaces 213, the leg insertion part 210 has a slightly tapered cross section.

[Relationship between locking recess 214 and locking piece 160]
In a state in which the leg insertion part 210 is completely accommodated in the lower accommodation space of the leg holding part 130, the locking pieces 161 are respectively disposed opposite to the front and rear side surfaces of the leg insertion part 210, and the locking protrusions 163. However, the length (height dimension) of the locking piece 161 is larger than the length (height dimension) of the leg insertion portion 210. The dimensions are larger by a predetermined dimension. Specifically, in the lower housing space of the leg holding portion 130, the locking piece 161 is a predetermined dimension above the upper end of the extension protrusion 153 (that is, the lower end of the guide protrusion 151) from the lower end of the base portion 131. Extends to position. Specifically, as shown in FIGS. 11 and 15, at the original position of the release member 170, the lower end position of the inclined surface 162 of the locking piece 161 is the protrusion height of the pressing protrusion 176 of the release member 170 or the height thereof. The length of the locking piece 161 is set so that it is positioned above the lower end of the guide protrusion 151 by a substantially equal height. Thereby, at the original position of the release member 170, the inclined surface 162 of the upper end portion of the locking piece 160 overlaps with the entire inclined surface 176 of the engaging portion 174, and at least a part (vertical center portion) is applied. It comes to touch. Further, in the non-elastically deformed state (original position) of the locking piece 160, the interval (arrangement interval) between the inner side surfaces of the elastic portion 161 of the pair of locking pieces 160 is between the front and rear side surfaces of the leg insertion portion 210. The intervals are almost the same as the dimensions.

[Relative dimensions of leg insertion part 210 and leg holding part 130]
Note that the width between the left and right side surfaces (left and right width) of the leg insertion portion 210 is substantially the same as the interval between the inner side surfaces (opposite side surfaces) of the support wall 154 of the guide portion 150 of the base 131 at the lower end where the maximum dimension is reached. (To be precise, the width is slightly smaller). Therefore, the right and left widths of the tapered tapered columnar leg insertion part 210 are tapered at the upper end, which is the minimum dimension, by the amount of taper than the interval between the inner side surfaces of the support wall 154 of the guide part 150 of the base part 131. It is a small width. In addition, the depth of the guide groove 214 of the leg insertion part 210 is substantially the same as the protrusion height of the extension protrusion 151 from the support wall 154 (more precisely, a slightly larger depth). On the other hand, the width between the front and rear side surfaces (front and rear width) of the leg insertion portion 210 is substantially the same as the interval between the inner side surfaces (opposite side surfaces) of the elastic portion 161 of the locking piece 160 of the base portion 131 at the lower end, which is the maximum dimension. (To be precise, the width is slightly smaller). Therefore, the front-rear width of the tapered rectangular columnar leg insertion portion 210 that is tapered is smaller by the taper than the interval between the inner side surfaces of the elastic portion 161 of the locking piece 160 of the base 131 at the upper end that is the minimum dimension. It is wide.

  Here, for simplification of illustration, in each drawing, the elastic portion 161 of the locking piece 160 is drawn so as to extend linearly. As shown, the central portion is curved inward (towards the center of the base 131). That is, the inner side surface of the elastic portion 161 is the outermost position (position closer to the inner peripheral surface of the base portion 131) at the base end, and slightly inward (a dimension of about 10 to 20% of the thickness) from there to the center portion. It is curved in the direction toward the innermost position (position closer to the center of the base 131) at the center. Therefore, the interval (arrangement interval) between the inner side surfaces (opposite side surfaces) of the elastic portion 161 of the pair of locking pieces 160 is maximum at the lower end in the height direction, and the central portion (the locking projection 163 portion) in the height direction. ) At the top and again at the top in the height direction. Thereby, in the mounting state in which the leg insertion portion 210 is completely inserted and accommodated in the lower accommodation space of the leg holding portion 130, the front and rear side surfaces of the leg insertion portion 210 are below the locking recess 214. The portion of the surface that faces the locking piece 160 at a portion thereof is substantially in close contact with the surface portion below the locking projection 163 of the inner surface of the elastic portion 161 of the locking piece 160 (close state or a slight gap). Close proximity). That is, as described in the description of the operation and effect described later, in the mounted state of the leg insertion portion 210, the pair of locking pieces 160 does not hold the leg insertion portion 210 elastically in pressure contact from both sides, By locking the locking recess 214 by the locking protrusion 163, the leg insertion portion 210 is fixedly held at a fixed position in the leg holding portion 130, and the locking pieces 161 are moved outward (to be separated from each other). ) As long as an external force that elastically deforms does not work, the state is maintained. On the other hand, the distal end portion of the elastic portion 161 is at an outer position in the radial direction of the base portion 131 as compared with the central portion. However, the elastic portion 161 is in contact with the front and rear side surfaces of the leg insertion portion 210. Since it is up to the position of the projecting portion 163, the distal end portion of the elastic portion 161 can be the same position as the central portion in the radial direction of the base portion 131, or in the extreme case, it can be an inward position. In addition, it is preferable that the elastic part 161 has a cross-sectional taper shape that gradually becomes thinner toward the distal end (upper end), and is configured so that the elastic deformation rate on the distal end side is larger than that on the proximal end side.

[Molding material of holding member]
Each of the first holding member 100 and the second holding member 180 can be integrally formed from a predetermined material such as a synthetic resin material by a molding method such as injection molding. Alternatively, at least the base 131 of the leg holding part 130 is preferably formed of a synthetic resin material having a high hardness equivalent to that of hard wood such as ebony or rosewood that is a material of the lantern leg 50. For example, the leg holder 130 or at least the base 131 is made of a hard synthetic resin material such as styrene / butadiene / acrylonitrile copolymer (ABS), polymethyl methacrylate (PMMA), high impact polystyrene (HIPS), polypropylene (PP), or the like. Of these, when the legs 50 are formed of ebony, which is one of the hardest materials as a wood material, it is preferable to use an ABS resin as the hard synthetic resin material. Also in this case, since the hardness of the hard synthetic resin material can be adjusted by a filler or an additive, the hardness of the hard synthetic resin material can be adjusted so that the hardness is equal to that of the hard wood of the legs 50. preferable. In this way, when the leg 50 is inserted into the leg holding part 130, a pleasant collision sound is generated when the end faces on both sides in the width direction of the insertion part 180 on the upper end face of the leg 50 collide with the lower end of the base part 131. To do. On the other hand, since the locking piece 160 needs to be elastically deformed in the thickness direction, a specific elastic force according to its dimensions (length, width and thickness) and the material of the synthetic resin material is applied. When the entire leg holding part 130 is integrally formed of a hard synthetic resin material, the locking piece 160 is also given the same high hardness, thereby increasing its strength. Therefore, the locking projection 163 of the locking piece 160 is fitted into the locking recess 214 of the leg insertion part 210 in a state where the leg insertion part 210 is completely stored in the lower storage space of the leg holding part 130. Thus, the entire locking piece 160 exhibits a high holding force with respect to the leg insertion portion 210.

[Operation when the leg 50 is worn]
An attachment procedure, operation, and effect when the leg 50 is attached to the base 20 using the lantern leg attachment structure configured as described above will be described.
In order to attach the legs 50 to the base 20 of the lantern 10, first, as shown in FIG. 16A, the leg insertion portions 210 at the upper ends of the legs 50 are placed in the lower accommodation spaces of the corresponding leg holding portions 130. It is inserted toward the inside upward from the lower end opening. At this time, the leg insertion part 210 is inserted so that the left and right side faces the pair of guide parts 150 and the front and rear side faces the pair of locking pieces 160. Then, the pair of guide grooves 214 on the left and right side surfaces of the leg insertion portion 210 are positioned corresponding to the extension protrusions 153 of the pair of guide portions 150 and are fitted into the corresponding extension protrusions 153, respectively. At this time, since the leg insertion part 210 has a rectangular column shape that is slightly tapered toward the upper end, the upper end part of the leg insertion part 210 can be smoothly inserted into the inside from the lower end opening of the base part 131. The leg insertion portion 210 is guided linearly into the leg holding portion 130 as the pair of guide grooves 214 are guided by sliding contact with the extension protrusions 153. At this time, as described above, at the time of insertion disclosure, the shape / dimension and arrangement mode of the guide groove 214 of the leg insertion portion 210 and the shape / dimension and arrangement mode of the length projection of the leg holder 130 are set. A predetermined margin in the width direction (a mutual gap in the width direction) is secured between the lower end portion of the extension protrusion 153 of the holding portion 130 and the upper end portion of the guide groove 214 of the leg insertion portion 201. The insertion portion 210 can be smoothly inserted while being guided by the extension protrusion 153. Further, the center part in the width direction of the front and rear side surfaces of the leg insertion portion 210 moves while sliding in contact with the inner side surfaces of the elastic portions 161 of the pair of locking pieces 160. As described above, the front and rear side surfaces of the leg insertion portion 210 are not elastically pressed against the inner surfaces of the pair of elastic portions 161 (the elastic portions 161 are not elastically deformed). Since the positional relationship with the inner surface of the elastic portion 161 is set, the leg insertion portion 210 has a guide surface 213 at the upper end of the lower surface of the locking protrusion 163 of the locking piece 160 (curved slope). The lower housing space of the leg holder 130 is moved upward until it comes into contact with the surface.

  Then, when the guide surface 213 of the leg insertion portion 210 abuts on the locking projection 163 and further moves upward, as shown in FIG. 16B, the pair of front and rear guide surfaces 213 are respectively paired with each other. It rides on the lower inclined surface of the locking protrusion 161 of the locking piece 161, and the elastic portion 161 is pressed outward to be elastically deformed. Then, as shown in FIG. 17A, the guide surface 213 of the leg insertion portion 210 (more precisely, the boundary line between the guide surface 213 and the upper end of the locking recess 214) completely connects the locking projection 163. At the moment of getting over (at the same time as getting over), the upper end of the locking projection 163 coincides with the upper end of the locking recess 214, and as shown in FIG. The locking projection 163 is completely fitted into the locking recess 214. As a result, the flat surface at the upper end of the locking projection 163 closely locks the flat surface of the upper wall of the locking recess 214 so that the leg insertion part 210 is fixedly held to the leg holding part 130. Then, the leg 50 is stably fixed to a predetermined position of the base 20 in a predetermined posture through the leg insertion part 210. In the mounting state of the leg insertion part 210 to the leg holding part 130, as described above, the shape / dimensions and arrangement of the guide groove 214 of the leg insertion part 210 and the shape of the length projection of the leg holding part 130 / Depending on the setting of dimensions and arrangement, there is a margin in the width direction (a gap in the width direction) between the lower end portion of the extension protrusion 153 of the leg holding portion 130 and the lower end portion of the guide groove 214 of the leg insertion portion 201. It disappears, and the lower end portion of the extension protrusion 153 and the lower end portion of the guide groove 214 of the leg insertion portion 201 are in a substantially close contact state (completely close contact or a slight gap, but is substantially moved in the width direction). Therefore, the leg insertion part 210 can be fixed and held in the leg holding part 130 with very high stability, and can be securely removed.

[Collision sound generation]
Further, in the stage of movement of the leg insertion portion 210 from FIG. 16B to FIG. 17A, the collision surfaces 52 which are the surface portions on both sides of the leg insertion portion 210 in the upper end surface 51 of the leg 50 are It instantaneously collides with opposing portions (surface portions on both the left and right sides) of the lower end surface of the base 131 that constitutes the lower end surface of the holding unit 130. That is, up to this position, the side surface of the leg insertion portion 210 has not received any force (progression suppression force) that prevents insertion from any member, including the extension protrusion 153 and the elastic portion 161, and thus the leg holding portion 130. The inner surface of the leg insertion portion 210 advances smoothly when the inclined surface 213 comes into contact with the locking projection 163, and the progress suppressing force by the locking projection 163 acts on the leg insertion portion 210. Is prevented to some extent, and at the moment when the boundary line between the guide surface 213 and the locking recess 214 gets over the upper end of the locking projection 163, the progress suppressing force by the locking projection 163 is released. Therefore, the boundary line between the guide surface 213 and the locking recess 214 from the position where the guide surface 213 of the leg insertion part 210 contacts the lower surface of the elastic part 161 (hereinafter referred to as “lower contact position”). The collision surface 52 of the leg 50 holds the leg during a very short distance and a very short time until a position (hereinafter referred to as an “upper contact position”) at the moment when the upper end of the locking projection 163 is overcome. It collides approaching the lower end surface of the part 130. At this time, the pressing force in the insertion direction applied by the user (operator) to the leg 50 is hindered by the progress suppressing force to the leg insertion portion 210 by the locking projection 163 only for the short distance and for a short time. It is released instantly after the short distance and short time (the state from FIG. 16 (b) to FIG. 17 (a)). As a result, the collision surface 52 of the leg 50 instantaneously approaches and collides with the lower surface of the leg holding portion 130 in the short distance and in a short time, so that the collision force becomes very large. The legs 50 are made of hard wood such as ebony and purple sand, which is harder than general wood, while at least the base 131 that is the collision surface portion of the leg holding portion 130 is also harder than general synthetic resin materials. The impact sound of the impact surface 52 against the lower end surface of the base portion 131 becomes a comfortable striking sound peculiar to the hard material (such as when beating a beat tree). .

[Operation when the leg 50 is removed]
Next, the removal procedure, operation, and effect when the leg 50 is removed from the base 20 using the lantern leg mounting structure configured as described above will be described.
In order to remove the leg 50 attached to the base 20 of the lantern 10 as described above from the base 20, first, as shown in FIGS. 18A to 18B, the pressing portion 141 of the push button 140 is used. Is pushed down from above with a fingertip or the like. Then, against the pressing biasing force of the biasing member 142, the pressing portion 141 moves downward in the upper accommodation space of the base 131, and the release member 170 is moved downward via the shaft fixing portion 142 and the connecting shaft 171. Can move. That is, when the leg insertion part 210 is attached, the seat part 172 contacts the partition wall 135, and the sliding surfaces 175 at both ends of the engaging part 174 contact the guide surface 162 at the upper end part of the locking piece 160. ing. Further, both end portions of the guided portion 173 are fitted in the guide grooves between the guide projections 151 of the guide portion 150, and both end surfaces of the guided portion 173 are in contact with the sliding contact projections 152 between the guide projections 151. Yes. Then, according to the push-down operation of the push button 140, when the seat portion 172 moves downward and is separated from the partition wall 135, the guided portion 173 is linearly moved and guided downward along the guide groove between the guide protrusions 151, The sliding surface 175 of the engaging portion 174 slides downward on the inclined surface 162 of the locking piece 160. As shown in FIG. 18B, as the engaging portion 174 moves downward, the sliding surface 175 elastically deforms the elastic portion 161 outward through the inclined surface 162. Then, at the moment when the upper end of the locking projection 163 is completely detached from the upper end of the locking recess 214 of the leg insertion part 210 (the moment of FIG. 18B) due to the elastic deformation of the elastic part 161. The locking of the locking recess 214 by the protrusion 163 is released, and the holding force for the leg insertion portion 210 is released. Thereby, the leg 50 can be smoothly removed from the leg holding part 130 of the base 20. In the state where the base 20 is on the upper side and the leg 50 is on the lower side, the leg 50 comes out of the leg holding portion 130 by its own weight.

[Pushing operation by pressing protrusion 176]
The state immediately before the locking projection 163 comes out of the locking recess 214, that is, the contact position of the sliding surface 175 of the engaging portion 174 is the center position in the height direction of the inclined surface 162 of the locking piece 160 (FIG. 18 ( between the lower end of the pressing projection 176 and the upper end surface of the leg insertion portion 210 during a very short distance and time from the position a) to the lower end position in the height direction (position shown in FIG. 18B). However, when the contact position of the sliding surface 175 of the engaging portion 174 is the lower end position of the inclined surface 162 of the locking piece 160, the lower end of the pressing protrusion 176 becomes the upper end surface of the leg insertion portion 210. 18 (b) to 19 (a), the sliding surface 175 of the engaging portion 174 is moved from the inclined surface 162 of the locking piece 160 to the upper end portion of the inner surface of the elastic portion 161. Until the locking recess 214 of the leg insertion portion 210 is locked by the locking projection 163. During a very short distance and time until the lock is released, the lower end of the pressing projection 176 abuts on the upper end surface of the leg insertion part 210, and the pressing force of the push button 140 is applied to the leg insertion part 210. By directly transmitting and pressing downward, the pressing protrusion 176 can perform an active pushing operation of the leg insertion portion 210 from the leg holding portion 130, and the leg 50 can be further lifted from the base 20. In this way, when the leg insertion part 210 is removed, it is placed on the upper surface side of the base 20 opposite to the lower surface side of the base 20 that is the attachment side of the leg insertion part 210. The release member 170 is simply disposed by pushing down the push button 140 in the direction (approaching direction) toward the leg insertion portion 210 coaxially with the leg insertion portion 210. By the leg insertion part Since the locking with the ten locking pieces 161 can be released, it is not necessary to perform a troublesome operation on the lower surface side of the base 20 to remove the leg 50, and the push button 140 on the upper surface side of the base 20. The leg 50 can be removed from the base 20 with a single touch by simply depressing the pin 20. Note that after the latching recess 214 of the leg insertion portion 210 is unlocked by the latching protrusion 163 of the latching piece 160. When the push button 140 is released, the pressing portion 141 returns to the original position by the pressing biasing force of the biasing member 143, and the state shown in FIG.

[Locking release operation by pressing protrusion 176]
Here, in the state of 18 (b), the distance that the elastic portion 161 is separated from the side surface of the leg insertion portion 210 due to the outward elastic deformation of the pair of locking pieces 160 (that is, the locking protrusion 163 is engaged). The moving distance in the direction of exiting from the locking recess 214 is not the distance at which the locking projection 163 completely slips out of the locking recess 214 of the leg insertion portion 210, but a minute portion on the upper end surface of the locking projection 163. It is also possible to set the distance at which the (inner edge portion) is locked to the outer edge portion of the upper end wall surface of the locking recess 214. In this way, if the sliding surface 175 of the engaging portion 174 elastically deforms the elastic portion 161 of the locking piece 160 outward and moves the locking protrusion 163 outward, the locking protrusion 163 is not moved. The external force that releases the locking between the inner edge portion of the locking protrusion 163 and the outer edge portion of the locking recess 214 does not come out of the locking recess 214 completely, and the shaft of the leg insertion portion 210 Unless inserted in the direction (extrusion direction), the leg insertion part 210 does not come out of the leg holding part 130. That is, until the lower end of the pressing protrusion 176 contacts the upper end surface of the leg insertion portion 210, the leg insertion portion 210 still remains with respect to the leg holding portion (the inner edge portion of the locking protrusion 163 and the locking recess 214). In the holding state) (by a small locking force by locking with the outer edge portion). Then, when the push button 140 is further pushed down from the state where the lower end of the pressing projection 176 is in contact with the upper end surface of the leg insertion portion 210 (the state shown in FIG. 18B), the pressing projection 176 is engaged with the locking projection. An external force (pressing force) that releases the locking between the inner edge portion of 163 and the outer edge portion of the locking recess 214 is applied to the leg insertion portion 210 to lock the inner edge portion of the locking protrusion 163 with the inner edge portion. Since the engagement with the outer edge portion of the recess 214 is instantaneously released, the leg insertion part 210 can be forcibly or actively pushed out from the leg holding part 130 with a click feeling. That is, at this time, the sliding surface 175 of the engaging portion 174 slides further downward from the inclined surface 162 of the locking piece 160 to the upper end portion of the inner surface of the elastic portion 161, and the leg by the locking protrusion 163. During a very short distance and time until the locking recess 214 of the insertion part 210 is released, the lower end of the pressing protrusion 176 comes into contact with the upper end surface of the leg insertion part 210 and the push button 140 The leg 50 can be directly transmitted to the leg insertion part 210 and pressed downward, and the leg 50 can be detached from the base 20 with one touch with a click feeling. In addition, since the pressing direction of the pressing force with respect to the pressing portion 141 of the push button 140 becomes the axial direction of the leg holding member 130 and coincides with the axial direction and the pushing direction of the leg insertion portion 210, the pressing force of the push button 140 is reduced. Can be efficiently used for pushing out the leg insertion portion 210.

[Smooth push-down by the notch 143]
The base 131 of the leg holder 130 has a pair of notches 133 that are large enough to insert a fingertip. The base 131 has a front side (outer peripheral side of the base 20) and a back side (center side of the base 20) in the radial direction of the base 20. ), The fingertips are naturally placed along the pair of notches 133 and placed on the upper surface of the pressing portion 141 of the push button 140 in the removal operation of the legs 50. The push button 140 can be pushed down very smoothly. In addition, since the pair of support protrusions 132 are disposed so as to completely cover both sides of the push button 140 after the legs 50 are mounted on the base 20, the push button 140 is not intended to be pressed on the pressing portion 141. Even when the fingertip is touched, unless the fingertip is intentionally arranged along the pair of notches 133, the pressing operation of the push button 140 by the fingertip is blocked by the support protrusion 132, so the leg is not intended. It is possible to prevent a situation in which 50 is detached from the base 20.

[Another example of mounting procedure for legs 50]
Another example of the attachment procedure when the leg 50 is attached to the base 20 using the lantern leg attachment structure configured as described above will be described.
In the lantern leg mounting structure, a total of three leg holders 130 are arranged at equiangular intervals along the circumferential direction of the base 20, and the upper part of the base 131 (the push button 140 is attached). The upper accommodation space) projects upward from the upper surface of the base 20 at the same height (that is, the upper end position of the support projection 131 of the base 131 is set to be the same). Therefore, as shown in FIG. 20, when the base 20 is placed in a reverse direction (with the upper surface on the lower side) and placed on a flat surface (a floor surface or a desk surface), the base portions of the three leg holders 130 are placed. The tip of the support protrusion 131 of 131 is in contact with the flat surface, and the base 20 is stably held in a flat surface shape via the base 131. As a result, in a state where the base 20 is reversed, the leg insertion portion 210 can be inserted into the lower accommodating space of the leg holding portion 130 on the lower surface side of the base 20 from above. It is possible to perform the mounting operation by inserting the lens even more easily.

[Mounting structure of support 30]
As shown in FIGS. 21 to 22, a column insertion portion 190 is fixed to the lower end of the support column 30 so as to be coaxial. The column insertion portion 190 has a flat plate-like support portion 191 (for example, a rectangular flat plate shape corresponding to the cross-sectional shape of the column 30) fixed to the lower end of the column 30. Further, a linear bar-shaped engaging portion 192 is integrally formed on one side end surface of the support portion 191 (an end surface corresponding to the curved surface of the support column 30) so as to protrude orthogonally. The engaging portion 192 has a rectangular cross section on the base end side, and has an inclined surface in which the lower surface on the distal end side is inclined upward toward the distal end. Further, although not shown, a cylindrical or columnar insertion portion is integrally formed at the center of the lower surface of the support portion 191 so as to protrude downward perpendicularly. The insertion portion has the same outer shape and diameter as the cross-sectional shape of the shaft insertion portion 113 which is a communication hole of the column holding portion 110, and is inserted into the shaft insertion portion 113 from above and held. Further, on the outer peripheral surface of the lower end portion of the insertion portion, engaging convex portions that project in the radial direction are integrally formed at positions spaced by an angular interval of 180 degrees in the circumferential direction. The pair of engaging convex portions have the same outer shape and dimensions as the cross-sectional shape of the pair of convex portion insertion portions 114 that are communication holes of the column holding portion 110, and are inserted into the convex portion insertion portions 114 from above. It has become. Then, the engaging convex portion of the column insertion portion 190 is positioned and inserted into the convex portion insertion portion 114 of the column holding portion 110, and the insertion portion of the column insertion portion 190 is inserted into the shaft insertion portion 113 for support. After moving downward until the lower surface of the portion 191 contacts the upper surface of the base 20 with the upper surface of the base 20 (the state shown in the solid line in FIG. 21 and FIG. 22A), the column 30 is interposed. When the column insertion portion 190 is rotated 90 degrees inward of the base 20 (to the left in the figure), the upper surfaces of the pair of locking projections of the column insertion portion 190 are hollow walls of the column holding portion 110. It is pressed in close contact with the lower surface of 112, and the support column 30 can be held and fixed to the base 20 (the phantom line in FIG. 21 and the state shown in FIG. 22B). In addition, in order to remove the support | pillar 30 from the base 20, the procedure reverse to the above is taken.

[Relationship Between Present Invention and Embodiment]
As described above, the lantern leg mounting structure of the first embodiment is for attaching the upper end portion of the leg 50 to the lower surface side of the base 20 of the lantern type lantern 10. The leg insertion part 210 is provided, and a leg holding part 130 that is provided at the attachment position of the leg 50 on the base 20 and can hold the leg insertion part 210 is provided. The leg insertion part 210 has a quadrangular prism shape protruding upward from the upper end of the leg 50, and the leg holding part 130 has a lower accommodation space of the base 131 that is a space shape that can accommodate the leg insertion part 210. However, in the present invention, as long as the leg insertion part can be accommodated and held in the lower accommodation space of the leg holding part, the leg insertion part is formed in a columnar shape other than a quadrangular column shape (a square columnar shape other than a square, a columnar shape, etc.). Or a cylindrical shape (cylindrical shape, rectangular tube shape), a cylindrical shape only at the upper end portion, and a columnar shape at the lower end portion. In this case, the lower accommodating space of the leg holding part is formed in a shape corresponding to the leg mounting part.

  Further, in the first embodiment, the leg-side locking portions are formed by the locking recesses 214 respectively provided on the front and rear side surfaces of the leg insertion portion 210, and are arranged at corresponding positions in the lower accommodation space of the base 131. The pair of locking pieces 160 constitutes the base side locking portion, but when the leg insertion portion is completely stored in the lower storage space of the leg holding portion, the leg side locking that is locked with each other As long as the base portion and the base side forming portion are formed, the convex side portion constitutes the leg side locking portion, and the base side side locking portion is provided with a concave portion for locking the convex portion, or the leg side locking portion is inserted into the leg portion. Other configurations such as providing on the left and right side surfaces of the landing portion and providing the base side locking portion at a corresponding position in the base portion may be adopted.

  In addition, the leg holding part 130 has a cylindrical shape embedded in the base 20 so that the axial direction is the thickness direction of the base 20, but the pressing part such as a push button is accommodated in the upper accommodation space, and As long as the leg insertion portion can be accommodated in the lower accommodation space, it can have another cylindrical shape such as a square cylindrical shape. In addition, the base 131 of the leg holder 130 is disposed as an internal space on the upper storage space (a portion for storing the push button 140) that protrudes upward from the upper surface of the base 20 and on the lower surface side of the base 20. The lower housing space (the portion housing the leg mounting portion 210) whose lower end is flush with the lower surface of the base 20 has a thickness within the base 20 in part or all of the upper housing space. It can be configured to be arranged on the upper side in the direction, or another configuration such as a part or all of the lower accommodation space protruding downward from the lower surface of the base 20.

  In addition, the base 131 has a lower housing space as a space shape corresponding to the outer shape of the leg insertion portion 210, and the leg insertion portion 210 can be inserted and accommodated. Any shape can be adopted as long as the mounting portion can be inserted and accommodated. Also. The pressing portion 141 is disposed in the upper accommodation space of the base portion 131 and is movable up and down, and can be operated to be elastically pressed downward against the elastic pressing biasing force of the biasing member 143. The configuration of the pressing portion is not limited to the button shape of the above-described embodiment, and may be any configuration as long as the pressing portion is disposed in the upper accommodation space of the base portion and can be moved up and down and can be elastically pushed downward. It can be.

  Further, the locking piece 160 as the base side locking portion is formed in the locking recess 214 as the leg side locking portion when the leg insertion portion 210 is stored in the lower storage space in the lower storage space of the base 20. When the leg insertion part 210 is accommodated in the lower accommodation space, the leg insertion part is disposed in a corresponding part (the front side and the rear side of the inner peripheral surface of the base 131 corresponding to the movement locus of the locking recess 214). 210 has a locking projection 163 that aligns with the locking recess 214 of the groove 210 and locks the locking recess 214 in a concave-convex relationship. As described above, the leg insertion portion is completely in the lower housing space of the leg holding portion. As long as it is set as the leg side latching | locking part and base part formation part which will be in a mutually locked state when it accommodates in, it can be set as arbitrary structures.

  In addition, the connecting portion connected to the shaft fixing portion 142 of the pressing portion 141 inside the base portion 131 is constituted by the connecting shaft 171, but the connecting portion is optional as long as the pressing operation of the pressing portion can be transmitted to the releasing portion. It can be set as this structure. In addition, the release portion 174 is disposed at an original position that is an upper position in the lower accommodation space of the base 131, and is moved from the original position to the lower release position via the connecting shaft 171 by a pressing operation of the pressing portion 141. The pressing portion 141 returns to the original position from the release position via the connecting shaft 171 by the pressing biasing force of the biasing member 143 by releasing the pressing operation, but the releasing portion lowers the leg insertion portion by the above operation. Release of the above configuration as long as the function of releasing the locking of the leg side locking portion by the base side locking portion can be achieved by moving to the release position by pushing down the pressing portion while being stored in the side storage space A configuration different from that of the unit 174 can be adopted. Note that the configuration of the release portion depends on the configuration of the base side locking portion to be released.

  Further, the leg insertion portion 210 is further provided with a leg-side guide including a recess extending linearly in the length direction on the left and right side surfaces other than the front and rear sides provided with the locking recess 214 as the leg-side locking portion. Although the guide groove 211 is provided as a portion, the leg side guide portion can be provided on the other side surface as long as it is provided on the side surface that does not interfere with the leg side locking portion. For example, as described above, when the leg-side locking portions are provided on the left and right side surfaces of the leg insertion portion, they can be provided on the front and rear side surfaces of the leg insertion portion that is a leg-side guide portion. In this case, the leg-side guide portion is provided on a side surface different from the leg-side locking portion, but is preferably provided at a position on the side surface at an angle interval of 90 degrees with the pair of leg-side locking portions. Further, at least the upper end portion of the leg insertion portion may be formed in a cylindrical shape to provide an inner side surface, and a leg side locking portion may be provided on the inner side surface. In this case, the base side locking portion is provided with a protruding portion that is inserted from the upper end of the upper accommodation space of the base portion (the partition wall 135 or the like of the first embodiment) into the inner space of the cylindrical upper end portion of the leg insertion portion. And a base side locking portion is provided at the protruding portion. That is, in the present invention, as long as the leg side locking portion and the base side locking portion are locked with each other when the leg insertion portion is completely inserted into the lower housing space of the base, any The configuration can be adopted.

  Further, the extension protrusion 153 as the base side guide portion of the leg holding portion 130 is a guide groove 214 as a leg side guide portion when the leg insertion portion 210 is accommodated in the lower accommodation space in the lower accommodation space of the base 131. Is disposed in a portion corresponding to (facing) and fits in a concave-convex relationship with a guide groove 214 as a leg side guide portion of the leg insertion portion 210 when the leg insertion portion 210 is accommodated in the lower accommodation space. In this case, the base side guide portion and the leg side guide portion engage with each other in a concave-convex relationship and exhibit a guide function. Other configurations such as a guide portion as a concave portion and a leg side guide portion as a convex portion can be adopted.

  Further, when the upper end portion of the leg insertion portion 210 is inserted into the lower housing space of the leg holding portion 130, the guide groove 214 as the leg side guide portion and the extension protrusion as the base side guide portion that are in a fitted state with each other. In a state where a predetermined gap is provided between the opposite side surfaces in the width direction of 153 and the entire leg insertion part 210 is inserted into the lower accommodating space of the leg holding part 130, The width of the guide groove 214 as the leg side guide portion and the base side guide so that the opposing side surfaces in the width direction of the guide groove 214 as the leg side guide portion and the extension protrusion 153 as the base side guide portion are in close contact with each other. The width of the extension protrusion 153 as a part is set to give a margin (adjustment) in the width direction, but it is also possible to make these widths substantially the same and not give a margin.

  By the way, in the said embodiment, although the leg holding | maintenance part 130 and the leg insertion part 210 were comprised as an attachment structure for fixing the leg 50 to the base 50, it is the same as the leg holding part 130 and the leg insertion part 210. You may employ | adopt as a structure for making the support | pillar 30 into a base. That is, instead of the column holding unit 110 and the column insertion unit 190, the same configuration as the leg holding unit 130 and the leg insertion unit 210 may be provided at the holding position of the support column 30 of the base 20.

10: lantern, 20: base, 21: flange, 23: center hole, 24: large-diameter hole, 25, 26, 27: holding hole, 25: pillar hole, 26: leg hole, 27: fastening member, 28, 29: housing recess 30: support column, 35: pillar connector, 40: fire bag, 41: lower ring, 50: leg 60: holding member (for leg connector), 70: leg connector, 72: mounting part DESCRIPTION OF SYMBOLS 100: 1st holding member, 110: Column holding part, 111: Base part, 112: Hollow wall, 113: Shaft insertion part, 114: Convex part insertion part 120: Connection part, 125,126: Fixing part, 127: Fastening Member 130: Leg holding part, 131: Base part, 132: Supporting protrusion part, 133: Notch part, 135: Partition, 136: Insertion hole 140: Push button, 140, 150, 160, 170: Detachable mechanism 141: Pressing part, 142: shaft fixing part, 143: biasing member 150: guide part, 1 1: Guide protrusion, 152: Sliding contact protrusion, 153: Extension protrusion 160: Locking piece, 161: Elastic part, 162: Inclined surface, 163: Locking protrusion 170: Release member, 171: Connecting shaft, 172: Seat Part, 173, 174, 175: release part, 173: guided part, 174: engaging part, 174a: support part, 174b: engaging protrusion, 175: sliding surface, 176: pressing protrusion 180: second Holding member

Claims (7)

A lantern leg mounting structure in which the upper end of the leg is attached to the lower surface side of the base of the standing lantern,
A leg insertion portion disposed at the upper end of the leg;
A leg holding portion disposed at a mounting position of the leg on the base and capable of holding the leg insertion portion freely;
The leg insertion part is
It has a cylindrical shape or columnar shape that protrudes upward from the upper end of the leg, and has a leg-side locking portion consisting of a concave or convex portion on the side surface,
The leg holder is
A cylindrical shape embedded in the base so that the axial direction is the thickness direction of the base, and an upper housing space disposed on the upper surface side of the base as an internal space, and a lower surface of the base A lower housing space disposed on the side, and a base portion in which the lower housing space is inserted into and accommodated as a space shape corresponding to the outer shape of the leg housing portion, and
A pressing portion that is disposed in the upper accommodation space of the base portion and is movable up and down, and can be elastically pushed down;
When the leg insertion portion is accommodated in the lower accommodation space in the lower accommodation space of the base portion, the leg insertion portion is disposed at a portion corresponding to the leg side locking portion, and the leg insertion portion is disposed in the lower accommodation space. A base side locking portion having a convex portion or a concave portion that locks the leg side locking portion of the leg insertion portion in a concave-convex relationship when housed in
A connecting part connected to the pressing part inside the base part;
It is disposed at an original position that is an upper position in the lower accommodation space of the base, and is moved from the original position to a lower release position via the connecting portion by a pressing operation of the pressing portion, and the pressing portion is pressed down A release part that returns from the release position to the original position via the connecting part by releasing the operation;
In the state where the leg insertion part is accommodated in the lower accommodation space, the release part is brought into the release position by a pressing operation of the pressing part, so that the leg side engagement part by the base side engagement part A lantern leg mounting structure characterized by releasing the lock. The leg insertion portion further includes a leg side guide portion including a concave portion or a convex portion linearly extending in the length direction on a side surface other than the side surface provided with the leg side locking portion,
The leg holding portion is further disposed in a portion corresponding to the leg side guide portion when the leg insertion portion is accommodated in the lower accommodation space in the lower accommodation space of the base portion, The base side which consists of a convex part or a recessed part which fits the leg side guide part of the said leg insertion part when it is accommodated in the said lower side accommodation space, and guides the insertion operation of the said leg insertion part With a guide,
In a state where the upper end portion of the leg insertion portion is inserted into the lower accommodating space of the leg holding portion, the opposing side surfaces in the width direction of the leg side guide portion and the base side guide portion which are in a fitted state with each other In a state where a predetermined gap is provided therebetween and the entire leg insertion portion is inserted into the lower accommodating space of the leg holding portion, the leg side guide portion and the base side which are fitted to each other 2. The leg of the lantern according to claim 1, wherein the width of the leg-side guide part and the width of the base-side guide part are set so that opposing side surfaces in the width direction of each guide part are in close contact with each other. Mounting structure. The leg-side locking portions are a pair of locking recesses provided respectively at the tip portions of a pair of side surfaces facing in the width direction in the leg insertion portion,
The base-side locking portion is made of a pair of plate-like elastic bodies that are disposed opposite to each other at positions spaced by 180 degrees in the lower accommodation space of the base and extend along the axial direction of the base. A locking piece,
The pair of locking pieces are respectively fitted into the locking recesses at positions where the leg insertion portions are aligned with the locking recesses when the leg insertion portions are accommodated in the lower receiving space, and the leg insertion portions. A locking projection for locking
The distance between the opposing side surfaces of the pair of locking pieces is such that when the leg insertion portion is inserted into the lower accommodating space of the base portion in the portion from the base end to the locking projection. In order not to elastically press the pair of side surfaces provided with the locking recesses of the leg insertion part, the stop piece is set to an interval equal to or larger than the interval between the pair of side surfaces providing the locking recesses of the leg insertion part,
In the pair of locking pieces, the leg insertion portion is inserted into the lower receiving space of the base portion, and a portion of the leg insertion portion on the tip side of the locking recess is in contact with the locking projection. From the locking recess of the leg insertion portion, the portion on the tip side of the locking insertion portion is elastically deformed in a direction away from each other in the lower housing space. It is allowed to get over and elastically recovers when a portion of the leg insertion portion on the tip side of the locking recess completely gets over the locking projection, and the locking projection is inserted into the leg. The distance from when the front end portion of the leg insertion portion comes into contact with the locking projection to completely get over the locking projection by fitting into the locking recess of the portion The upper end surface of the leg on the outer periphery of the base end of the leg insertion portion collides with the lower end surface of the base portion to generate a striking sound. Mounting structure of the leg lantern of claim 1 or 2, wherein the the. The release unit is
A pair of engaging portions opposed to the upper ends of the pair of locking pieces in a separated state in the lower accommodation space of the base when the release portion is in the original position;
A pair of pressing protrusions protruding from the lower surfaces of the pair of engaging portions;
The pair of engaging portions contact the upper ends of the pair of locking pieces when the release portion is moved from the original position to the lower release position via the connecting portion by a pressing operation of the pressing portion. The pair of locking pieces are elastically deformed outward,
The pair of pressing protrusions are brought into contact with the upper end surface of the leg insertion portion by moving the release portion further downward from the release position via the connecting portion by a pressing operation of the press portion. The lantern leg mounting structure according to claim 3, wherein the insertion portion is forcibly pushed downward from the lower accommodation space of the base portion. The base has a portion protruding upward from the upper surface of the base, and a pair of notches are arranged in parallel along the radial direction of the base,
The said base part has arrange | positioned the said press part in the said upper side accommodation space by making the internal space of the part which protrudes upwards from the upper surface of the said base into the said upper side accommodation space. The lantern leg mounting structure according to any one of the preceding claims. A holding member used in a lantern leg mounting structure for attaching an upper end portion of a leg to a lower surface side of a base of a standing lantern,
A leg insertion portion that is disposed at a mounting position of the leg on the base, has a cylindrical shape or a column shape protruding upward from the upper end of the leg, and has a leg-side locking portion that is a concave portion or a convex portion on the side surface. With a leg holder that can be held freely,
The leg holder is
A cylindrical shape embedded in the base so that the axial direction is the thickness direction of the base, and an upper housing space disposed on the upper surface side of the base as an internal space, and a lower surface of the base A lower housing space disposed on the side, and a base portion in which the lower housing space is inserted into and accommodated as a space shape corresponding to the outer shape of the leg housing portion, and
A pressing portion that is disposed in the upper accommodation space of the base portion and is movable up and down, and can be elastically pushed down;
When the leg insertion portion is accommodated in the lower accommodation space in the lower accommodation space of the base portion, the leg insertion portion is disposed at a portion corresponding to the leg side locking portion, and the leg insertion portion is disposed in the lower accommodation space. A base side locking portion having a convex portion or a concave portion that locks the leg side locking portion of the leg insertion portion in a concave-convex relationship when housed in
A connecting part connected to the pressing part inside the base part;
It is disposed at an original position that is an upper position in the lower accommodation space of the base, and is moved from the original position to a lower release position via the connecting portion by a pressing operation of the pressing portion, and the pressing portion is pressed down A release part that returns from the release position to the original position via the connecting part by releasing the operation;
In the state where the leg insertion part is accommodated in the lower accommodation space, the release part is brought into the release position by a pressing operation of the pressing part, so that the leg side engagement part by the base side engagement part The holding member of the attachment structure of the lantern leg is characterized by releasing the lock. A board-shaped base;
A support column with a lower end detachably attached to the upper surface side of the base,
A fire bag supported by the support;
A plurality of legs whose upper ends are detachably attached to the lower surface side of the base;
A lantern-type lantern comprising a leg coupler that spans and couples the plurality of legs,
A leg insertion portion disposed at an upper end of the leg as an upper end portion of the leg;
A leg holding portion disposed at the mounting position of the leg on the base and capable of holding the leg insertion portion freely;
The leg insertion part is
It has a cylindrical shape or columnar shape that protrudes upward from the upper end of the leg, and has a leg-side locking portion consisting of a concave or convex portion on the side surface,
The leg holder is
A cylindrical shape embedded in the base so that the axial direction is the thickness direction of the base, and an upper housing space disposed on the upper surface side of the base as an internal space, and a lower surface of the base A lower housing space disposed on the side, and a base portion in which the lower housing space is inserted into and accommodated as a space shape corresponding to the outer shape of the leg housing portion, and
A pressing portion that is disposed in the upper accommodation space of the base portion and is movable up and down, and can be elastically pushed down;
When the leg insertion portion is accommodated in the lower accommodation space in the lower accommodation space of the base portion, the leg insertion portion is disposed at a portion corresponding to the leg side locking portion, and the leg insertion portion is disposed in the lower accommodation space. A base side locking portion having a convex portion or a concave portion that locks the leg side locking portion of the leg insertion portion in a concave-convex relationship when housed in
A connecting part connected to the pressing part inside the base part;
It is disposed at an original position that is an upper position in the lower accommodation space of the base, and is moved from the original position to a lower release position via the connecting portion by a pressing operation of the pressing portion, and the pressing portion is pressed down A release part that returns from the release position to the original position via the connecting part by releasing the operation;
In the state where the leg insertion part is accommodated in the lower accommodation space, the release part is brought into the release position by a pressing operation of the pressing part, so that the leg side engagement part by the base side engagement part A lantern characterized by releasing the lock.

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