JP2017084510A - Assembly structure of two members and lighting fixture including assembly structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly structure which can combine two members with a simple structure and which can achieve cost reduction by reducing the number of components and man-hours, and to provide a lighting fixture including the assembly structure.SOLUTION: By a relative change of a rotation position in a state where each of opening parts 14, 24 of a case body 11 and a cover member 21 are fitted with each other, a locking part 31 of the case body 11 can be engaged with/disengaged from a locked part 32 of the cover member 21, and separation in an axial direction of each of the opening parts 14, 24 is restricted. When the locked part 32 changes to the rotation position engaged with the locking part 31, a locking claw 41 of the case body 11 is snap fitted to a locked hole 42 of the cover member 21, and the relative rotation of each of the opening parts 14, 24 is restricted. Also, the snap fit engagement is released only by an operation of inserting a tool T in a locked hole 42, and deviating the rotation position by the tool T, and the release is maintained thereafter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an assembly structure for detachably combining two members each having a cylindrical opening that fits together, and an illuminating lamp including the assembly structure.

  2. Description of the Related Art Conventionally, there are various types of assembly structures for detachably combining two members having cylindrical openings that fit together. Among them, for example, as an example applied to the case structure of an illumination lamp, it relates to a combination of a case (including a disk-shaped base) in which an LED unit is disposed and a cover that is attached to the case so as to protect the LED unit. Many are known (for example, see Patent Documents 1 and 2).

  In such an illumination lamp, the user must replace the LED unit inside the case, or remove a foreign matter such as an insect that has entered the case from the hole in the wiring behind the wall where the lamp is installed. It has a removable structure. When removing such a cover, there is a risk of electric shock if it comes into contact with a charging part (substrate or the like), so design considerations are necessary. In particular, the Electrical Appliance and Material Safety Law stipulates that the test finger does not come into contact with the charged part in a state in which a part that can be easily removed without a tool is removed with respect to the design consideration.

  Therefore, in the conventional LED lighting fixture, as a design consideration, for example, the cover is fixed to the main body by fastening with screws, and cannot be removed unless a tool is used, that is, a structure that cannot be removed unless intended to be removed. It was. Alternatively, the cover can be easily removed, but instead, the LED substrate and the power supply substrate inside the case are covered with a separate cover so that they cannot be directly contacted.

JP2015-156283A JP 2012-182192 A

  However, according to the design considerations of the conventional illumination lamp described above, in any case, a screw for fastening or a cover for separately covering the substrate is required as a separate part. Therefore, the number of parts and the number of assembling steps of the lighting lamp are increased, which causes a problem of cost increase.

Moreover, when attaching via a screw | thread, the fastening operation | work is troublesome and there also existed a problem that an operation | work burden increased.
Further, when the substrate is covered with a cover, there is a problem that the light emission efficiency is lowered by transmitting light through the cover. In addition, since heat is likely to be trapped inside the cover, there are problems that the life of the LED and other electrical components is reduced, and failure is likely to occur.

  By the way, as an assembly structure of two members that can also be applied to the case structure of an illumination lamp, for example, a structure using engagement by snap fit is known. Here, the snap fit is a method of mechanically fixing a convex portion provided on a member by fitting the hook into a concave portion on the receiver side using the elasticity of the material. In order to release the engagement by the snap fit, it is usually necessary to insert the tip of a tool such as a precision screwdriver into the recess and remove the projection from the recess.

  When the engagement by the snap fit is released by the insertion of such a tool, the above-mentioned design-related laws and regulations are also met. However, even if the engagement by the snap fit is applied to the case structure of the illumination lamp as it is, the following problem occurs.

  In other words, when the case and the cover of the lighting lamp are assembled by snap-fit engagement, when removing the cover, the cover is opened with respect to the case while maintaining the disengaged state with the tool inserted into the recess. Have to work like that. It was obvious that these two operations were difficult to perform simultaneously with one hand, and it was very troublesome to remove the cover.

  The present invention has been made paying attention to the problems of the above-described conventional technology, and it is possible to combine two members with a simple configuration, thereby reducing the number of parts and the number of assembly steps, thereby reducing the cost. An assembly structure of two members that can be realized and can be easily attached and detached, and can be easily separated even if a tool cannot be used. An object of the present invention is to provide an illuminating lamp having the assembly structure.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] In an assembly structure for detachably combining two members (11, 21) having cylindrical openings (14, 24) that fit together,
Due to a change in the relative rotational position in a state in which the openings (14, 24) of the two members (11, 21) are fitted together, the locking portion ( 31) can be engaged with and disengaged from the locked portion (32) provided on the other member (11), and when the locking portion (31) is engaged with the locked portion (32), A connecting means (30) for restricting separation in the axial direction as the rotation center of the openings (14, 24);
When the two members (11, 21) change to a relative rotational position where the locking portion (31) engages with the locked portion (32), either one of the members (11) (11) ) Is engaged with a locked hole (42) provided in the other member (21) by a snap fit, and the relative opening portions (14, 24) are relative to each other. The engagement by the snap fit is released only by an operation of restricting the rotation and inserting a predetermined tool (T) into the locked hole (42) and shifting the rotational position by the tool (T). And a locking means (40) for which the release is maintained thereafter.

  [2] The operation of shifting the rotational position by the tool (T) not only releases the engagement of the locking means (40) by snap fit, but also the connecting means (30) also provides the locking portion (31). ) Is disengaged from the locked portion (32) and the engagement is released, the assembly structure according to [1].

  [3] A plurality of the locking portions (31) and the locked portions (32) in the coupling means (30) are provided at relative positions where they are slidably engaged with each other in a state of overlapping in the axial direction. According to the above [1] or [2], the change in the rotational position causes displacement into an engagement state overlapping each other in the axial direction and a disengagement state not overlapping each other in the axial direction. Assembly structure.

  [4] The locking portion (31) and the locked portion (32) in the coupling means (30) are one member (21) having the locking portion (31) in the engaged state. The assembly structure according to [3], wherein the rotation of the other member (11) having the locked portion (32) in one direction is restricted with respect to the other member (11).

  [5] The locking claw (41) in the locking means (40) has a tip end side (41a) that is in sliding contact with the peripheral surface of the locked hole (42), which is inclined in a tapered shape. A locked state that is fitted into and engaged with the locked hole (42) with rotation in one direction, and is engaged and engaged with the locked hole (42), and the locked [1], [2], wherein the tool (T) inserted from the outside of the hole (42) is pushed into the unlocked state released from the locked hole (42). The assembly structure according to [3] or [4].

[6] The member (11) having the locking claw (41) is inserted from the outside of the locked hole (42) into the position facing the tip side (41a) of the locking claw (41). A guide portion (43) for guiding the tool (T) obliquely in the one direction while removing the locking claw (41) from the locked hole (42),
When the tool (T) is raised in the one direction with the tip of the tool (T) guided to the guide part (43) as a fulcrum, the engagement is accompanied by the movement of the tool (T). When the stop hole (42) is pushed in the one direction, the member (12) having the locked hole (42) is set to rotate to a position where the unlocked state is maintained. The assembly structure according to [5], characterized in that

[7] An illumination lamp (10) provided with the assembly structure of the two members (11, 21) according to [1], [2], [3], [4], [5] or [6] Because
The one member is a case main body (11) of an illumination lamp (10) that houses a light source (50) therein, and the other member covers the light source (50) and covers the case main body (11). ) Is a cover member (21) detachably combined,
The illuminating lamp (10), wherein the case body (11) and the cover member (21) are combined in a state in which the respective openings (14, 24) are fitted.

  [8] A seal member (28) is provided between the openings (14, 24) of the case body (11) and the cover member (21) to maintain the water resistance inside the communication. The illumination lamp (10) according to [7] above, wherein

Next, the operation based on the above solution will be described.
According to the assembly structure described in [1] above, in a state where the openings (14, 24) of the two members (11, 21) are fitted, the connection is caused by a change in relative rotational position of each other. The locking part (31) in one member (21) of the means (30) is engaged with and disengaged from the locked part (32) in the other member (11). That is, when the locking portion (31) is engaged with the locked portion (32), the opening portions (14, 24) are restricted from being detached in the axial direction, but the locking portion (31) is locked. When detached from the portion (32), the openings (14, 24) can be separated in the axial direction. Here, the axial direction is a direction in which an imaginary axis that passes through the center of each opening (14, 24) and serves as the center of rotation extends.

  Moreover, the relative rotation of the openings (14, 24) is restricted by the locking means (40) in the two members (11, 21), so that the connection by the connecting means (30) does not inadvertently disconnect. Can be fixed. When the locking means (40) changes to the relative rotational position where the locking portion (31) engages with the locked portion (32) of the coupling means (30), one of the members (11) (11) ) Is engaged with the locked hole (42) in the other member (21) by snap fit.

  Therefore, the relative rotation of each opening (14, 24) is restricted, and the engagement state of the locking portion (31) and the locked portion (32) is also maintained at the rotation position. On the other hand, when separating the two members (11, 21), it is necessary to first release the snap-fit engagement of the locking means (40). For this purpose, the snap-fit engagement is released only by inserting a predetermined tool (T) into the locked hole (42) and shifting the rotational position with the tool (T).

  According to such an operation by the tool (T), the snap-fit engagement is not temporarily released only during the operation of the tool (T), but the tool (T) is engaged by shifting the rotational position. Even after being pulled out from the stop hole (42), the released state is maintained as it is. Therefore, it is not always necessary to separate the two members (11, 21) at the same time as the operation with the tool (T), and they may be separated after the operation with the tool (T) is completed.

  According to the above assembling structure, not only can the number of parts be reduced and the cost can be reduced as compared with the case of combining two members (11, 21) via screws, but also the work of assembling or separating each other can be achieved. It is easy and the working time can be shortened. In addition, if the user does not intend to prepare and remove the tool (T), there is no risk of inadvertent separation.

  According to the assembly structure described in [2], not only the snap-fit engagement of the locking means (40) is released by the operation of shifting the rotation position by the tool (T), but also the connection means ( 30), the locking part (31) is released from the locked part (32) and the engagement is released. Thereby, since the engagement of the connecting means (30) is simultaneously released only by the releasing operation of the locking means (40), the work of separating the two members (11, 21) can be further simplified.

  Further, the locking portion (31) and the locked portion (32) of the connecting means (30) can be slidably contacted with each other in the state of being overlapped with each other in the axial direction as described in [3] above. A plurality of circumferential relative positions that engage with each other are provided at intervals. Then, due to the change in the mutual rotational position, the engagement state overlaps in the axial direction if it matches the circumferential direction, and the disengagement state does not overlap in the axial direction if separated in the circumferential direction. According to this structure, it can be easily engaged / disengaged only by rotating any one member (11, 21).

  Here, as described in [4] above, the locking portion (31) and the locked portion (32) are one member having the locking portion (31) in the engaged state ( 21) may be configured to restrict rotation in one direction, either forward or reverse, with respect to the other member (11) having the locked portion (32). As a result, the rotational direction and the positioning thereof for making the engaged state and the disengaged state in the connecting means (30) become clear, and the positional deviation in one direction after the rotation can be prevented.

  Further, if the locking claw (41) in the locking means (40) is configured as described in [5] above, for example, when it is not yet fitted in the locked hole (42), It can move smoothly with rotation in one direction inclined in a taper shape while elastically slidably contacting the peripheral surface of the hole (42). Inserted and locked.

  The holding angle of the portion hooked to the locked hole (42) by the locking claw (41) is an angle that cannot be removed once fitted, but the tool (T) is inserted from the outside of the locked hole (42) Then, by applying a force in a direction to disengage against the elastic force of the locking claw (41), the locking claw (42) is released from the locked hole (42) to be unlocked. Thus, only when the tool (T) is used, it is possible to displace the lock state to the unlock state.

  In the locking means (40), the member with the locked hole (42) is changed to the member with the locking claw (41) by the tool (T) inserted into the locked hole (42). On the other hand, by shifting the rotational position, the snap fit engagement is maintained after that, but the operation of the tool (T) here may be set as described in [6] above. .

  That is, in the member (11) having the locking claw (41), a guide portion (43) is provided at a position facing the distal end side (41a) of the locking claw (41), and the locked hole The tool (T) inserted from the outside of (42) is inclined obliquely in one direction while removing the locking claw (41) from the locked hole (42) by the guide portion (43). When the tool (T) is raised in one direction with the tip of the tool (T) as a fulcrum, the locked hole (42) accompanying the movement of the tool (T) is pushed in one direction, The relative rotational position of the member (12) having the locking hole (42) is shifted.

  Thus, the snap-fit engagement of the locking means (40) can be temporarily released by only a series of simple operations of inserting the tool (T) into the locked hole (42) and starting up. Therefore, the lever can be easily shifted to the relative rotational position where the locking claw (41) is not reinserted into the locked hole (42) by the lever principle. In addition, it is good to form a guide part (43) as a rib beside the said latching claw (41).

  The above two-part assembly structure may be applied to the case structure of the illumination lamp (10) as described in [7], for example. That is, one member is the case main body (11) of the illumination lamp (10) that houses the light source (50) inside, and the other member is attached to and detached from the case main body (11) while covering the light source (50). Let it be the cover member (21) combined as possible. Here, the case body (11) and the cover member (21) are combined in a state in which the respective openings (14, 24) are fitted.

  In particular, as described in [8] above, the sealing member for maintaining the waterproofness of the interior communicated between the openings (14, 24) of the case body (11) and the cover member (21). If (28) is interposed, it can be utilized as a casing having a waterproof structure suitable for an illumination lamp (10) such as a humid bathroom.

  According to the assembly structure of the two members according to the present invention and the illumination lamp provided with the assembly structure, it becomes possible to combine the two members with a simple configuration, and the number of parts and assembly man-hours can be reduced. Cost reduction can be realized. In addition, the attaching and detaching work of the two members can be easily performed, and the work can be easily performed even though it cannot be separated without using a tool.

It is a perspective view which shows the illumination lamp which concerns on embodiment of this invention. It is a disassembled perspective view which decomposes | disassembles each component and shows the illumination lamp which concerns on embodiment of this invention. It is a top view which shows the illumination lamp which concerns on embodiment of this invention. It is a front view which shows the illumination lamp which concerns on embodiment of this invention. It is a bottom view which shows the illuminating lamp which concerns on embodiment of this invention. It is a side view which shows the illuminating lamp which concerns on embodiment of this invention. It is the VII-VII sectional view taken on the line in FIG. It is sectional drawing which cut | disconnects the upper side of a cover member and shows the structure inside a lamp in the state by which the case main body and cover member of the illumination lamp which concern on embodiment of this invention were cancelled | released. It is explanatory drawing which expands and shows the principal part of a connection means and a locking means in the state by which engagement with the case main body and cover member of the illumination lamp which concerns on embodiment of this invention was cancelled | released. Sectional drawing which expands and shows the principal part of a connection means in the state by which engagement with the case main body and cover member of the illumination lamp which concerns on embodiment of this invention was cancelled | released (XX sectional drawing in FIG. 8) ). Sectional drawing (XI-XI line sectional drawing in FIG. 8) which expands and shows the principal part of a locking means in the state by which engagement with the case main body and cover member of the illumination lamp which concerns on embodiment of this invention was cancelled | released ). It is sectional drawing which cut | disconnects the upper side of a cover member and shows the structure inside a lamp in the state which the case main body and cover member of the illumination lamp which concern on embodiment of this invention engaged. It is explanatory drawing which expands and shows the principal part of a connection means and a locking means in the state which the case main body and cover member of the illumination lamp which concern on embodiment of this invention were engaged. FIG. 13 is an enlarged cross-sectional view (cross-sectional view taken along the line XIV-XIV in FIG. 12) showing the main part of the connecting means in a state where the case main body and the cover member of the illumination lamp according to the embodiment of the present invention are engaged. . FIG. 13 is an enlarged cross-sectional view (cross-sectional view taken along line XV-XV in FIG. 12) showing the main part of the locking means in a state where the case main body and the cover member of the lighting lamp according to the embodiment of the present invention are engaged. . FIG. 3 is an explanatory view showing, in an enlarged manner, main operations of a tool for releasing the engagement between the case main body and the cover member of the lighting lamp according to the embodiment of the present invention, and the main parts of the locking means and the connecting means during this operation. is there. FIG. 5 is an explanatory view showing, in an enlarged manner, main portions of the last operation by a tool for releasing the engagement between the case main body and the cover member of the illumination lamp according to the embodiment of the present invention, and the lock means and the connection means after this operation. is there. It is explanatory drawing which expands and shows the whole illumination lamp and locking means which concern on the modification which is another embodiment of this invention. It is explanatory drawing which shows the process in which a locking means reaches a locked state in the illumination lamp which concerns on the modification which is another embodiment of this invention. It is explanatory drawing which shows the process in which a locking means reaches an unlocking state in the illumination lamp which concerns on the modification which is another embodiment of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments representing the present invention will be described below with reference to the drawings.
1 to 17 show an embodiment of the present invention.
A case where the assembly structure in which the two members according to the present embodiment are detachably combined is applied to the case structure of the illumination lamp 10 will be described below as an example. The one member and the other member, which are two members, are not particularly limited in specific shape, but are provided with cylindrical openings that fit into each other.

  As shown in FIGS. 1 and 2, an illumination lamp 10 according to the present embodiment is disposed on a wall surface such as a ceiling or a side wall of a bathroom, and a case 10 a forming the outer shape thereof is waterproof. . The case 10a has a flat disk shape that is thin in the depth direction parallel to the central axis as a whole, and includes a case body 11 as one member and a cover member 21 as the other member.

  The case main body 11 houses the light source unit 50 inside thereof, and the cover member 21 is detachably combined with the case main body 11 so as to cover the light source unit 50. The central axes of the case body 11 and the cover member 21 coincide with the axes that are the rotation centers of each other, and the direction in which the axes extend is referred to as the “axial direction”.

First, an overview of the entire case 10a of the illumination lamp 10 will be described.
As shown in FIG. 2, the case body 11 is formed of a synthetic resin or metal in a circular and shallow case shape, and a flange-shaped peripheral wall portion 13 is integrally provided along the outer peripheral edge of the bottom surface portion 12. It has been. The front edge side of the peripheral wall 13 forms a circular opening 14 as it is.

  A light source unit 50 is disposed on the inner surface of the bottom surface portion 12. Therefore, a pair of bosses 12a and 12a are mounted on the inner surface of the bottom surface portion 12 so as to attach the light source unit 50 to a position separated from the inner surface. In addition, the bottom surface portion 12 is provided with an attachment hole for fixing with a screw or the like, an insertion hole for passing various wires, and the like.

  The cover member 21 is formed in a circular case shape that is deeper than the case body 11, and is generally referred to as a glove. A cylindrical peripheral wall portion 23 is integrally provided along the outer peripheral edge of the front surface portion 22 of the cover member 21. The front edge side of the peripheral wall 23 forms a circular opening 24 as it is. The cover member 21 is formed of a synthetic resin or the like that is a translucent material so that light can be emitted to the outside at least from the front surface portion 22. In the peripheral wall portion 23, a flange portion 25 is formed at a position slightly away from the opening portion 24 and extends radially outward over the entire circumference.

  In the present embodiment, the outer diameter of the opening 24 of the cover member 21 is set smaller than the inner diameter of the opening 14 of the case body 11, and the opening 24 of the cover member 21 is located inside the opening 14 of the case body 11. Are combined to fit. Here, as shown in FIG. 7, the edge of the opening 24 of the cover member 21 abuts around the inner surface of the bottom surface 12 of the case body 11, and the edge of the opening 14 of the case body 11 is the cover member 21. It is set so as to abut against the flange portion 25. As described above, the case main body 11 and the cover member 21 communicate with each other in a state where the internal spaces are sealed by fitting the openings 14 and 24 together.

Next, the connection means 30 between the case body 11 and the cover member 21 will be described.
The connecting means 30 has a locking portion 31 provided on the cover member 21 as a result of a change in relative rotational position when the openings 14 and 24 of the case body 11 and the cover member 21 are fitted together. It is possible to engage with and disengage from the locked portion 32 provided on the door. When the locking portion 31 engages with the locked portion 32, the axial separation of the openings 14 and 24 is restricted.

  On the inner peripheral surface of the peripheral wall portion 23 of the cover member 21, a pair of locking portions 31, 31 protruding on the inner peripheral surface is provided at a position facing the diameter direction. As shown in FIGS. 8, 9, and 10, each locking portion 31 is formed in a thin plate shape that is narrow and extends in an arc shape along the inner peripheral surface of the peripheral wall portion 23. Further, the distal end 31 a of the locking portion 31 is inclined toward the opening 24 toward one direction in which the cover member 21 rotates with respect to the case body 11. Each such locking part 31 is provided in a shape that is point-symmetric with respect to the rotation axis.

  On the inner surface of the bottom surface portion 12 in the case main body 11, a pair of locked portions 32, 32 protruding on the inner surface are provided at positions opposed to the diameter direction. Each of the locked portions 32 is provided in a shape that is point-symmetric with respect to the rotation axis, like the locking portion 31. As shown in FIGS. 8, 9, and 10, each locked portion 32 extends in parallel with the inner surface from the upper end of a support piece 32 a that is erected on the inner surface of the bottom surface portion 12, and It forms as the to-be-latched piece 32b engaged so that the latching | locking part 31 may overlap.

  Here, the support piece 32a is arranged along the circumferential direction, and the locked piece 32b connected to the upper end of the support piece 32a extends outward in the radial direction. In addition, one end edge of the support piece 32 a extends radially outward and a tip of the locking portion 31 comes into contact with the support piece 32 a to restrict a rotation range in one direction in which the cover member 21 rotates with respect to the case body 11. A rotation restricting piece 32c is formed. The rotation of the cover member 21 in one direction with respect to the case body 11 is also restricted by the tip 31a of the locking portion 31 coming into contact with the rotation restricting piece 32c. Moreover, when the front end 31a of the locking part 31 is inclined, it is avoided that the edges collide with each other when the locking part 31 overlaps the locked piece 32b of the locked part 32.

  As described above, the locking portion 31 and the locked portion 32 that form the connecting means 30 are provided in two relative positions that are slidably engaged with each other so as to overlap each other in the axial direction (up and down). The locking portion 31 and the locked portion 32 are engaged with each other in the axial direction and separated from each other in the axial direction by changing the rotational positions of the openings 14 and 24 of the case body 11 and the cover member 21. Displace to the state. In the engaged state, not only the detachment of the openings 14 and 24 in the axial direction is restricted, but also the rotation in one direction is restricted as described above.

Next, the locking means 40 between the case body 11 and the cover member 21 will be described.
When the case main body 11 and the cover member 21 change to a relative rotational position where the locking portion 31 engages with the locked portion 32, the locking means 40 is provided in the case main body 11 along with this. The locking claw 41 is engaged with a locked hole 42 provided in the cover member 21 by snap fit. Although the relative rotation of the openings 14 and 24 is restricted by the snap-fit engagement, an operation of inserting a predetermined tool T into the locked hole 42 and shifting the rotational position by the tool T. The snap-fit engagement is released only by, and the release is maintained thereafter.

  On the outer peripheral surface of the peripheral wall portion 13 of the case main body 11, a storage portion 15 that protrudes radially outward is provided at a position facing one of the locked portions 32 over the peripheral wall portion 13. The storage portion 15 is formed in an opening cross section that is narrow and extends in an arc shape along the outer peripheral surface of the peripheral wall portion 13, and the upper and lower surfaces are respectively open. A locking claw 41 is provided on one end side of the upper portion of the opening of the storage portion 15.

  As shown in FIGS. 8, 9 and 11, the locking claw 41 is integrally connected to one end side in the upper opening portion of the storage portion 15, and its distal end side 41 a extends toward the other end side in the upper opening portion. It is arranged so that it can be elastically deformed up and down. The distal end side 41a is inclined in a tapered shape so as to smoothly come into sliding contact with the peripheral surface of the locked hole 42 described later. In addition, the holding angle of the portion that is hooked in the locked hole 42 behind the inclined top end on the distal end side 41a is set to a right angle so that it cannot be removed as it is once fitted.

  Further, on the other end side of the lower portion of the opening of the storage portion 15, the tool T inserted from the outside of the locked hole 42 described later is engaged with the locking claw 41 while removing the locking claw 41 from the locked hole 42. A guide portion 43 for guiding the taper 41 obliquely in the same direction as the direction in which the taper is inclined is provided. Here, as shown in FIG. 16, the tool T corresponds to a tool having a thin rod shape on the tip side such as a precision screwdriver that can be inserted into the locked hole 42.

  As shown in FIG. 11, the guide portion 43 is formed as a rib inside the storage portion 15, and is a position where the distal end side 41 a of the locking claw 41 faces from below from the other end side in the lower opening portion of the storage portion 15. It extends diagonally. On the proximal end side of the guide portion 43, there is a concave groove 43a for positioning and abutting the tip of the tool T guided obliquely along the guide portion 43. Note that a positioning stopper 15a is provided projecting upward at one end of the upper portion of the opening of the storage portion 15 so as to abut one end of a tongue piece 26 described later.

  In the flange portion 25 of the cover member 21, a tongue piece portion 26 that protrudes radially outward is provided on one end side corresponding to the storage portion 15. The tongue piece portion 26 has a shape that matches the upper opening of the storage portion 15, and has the same plate thickness as the flange portion 25. A locked hole 42 is provided in the approximate center of the tongue piece 26. As shown in FIGS. 8, 9, and 11, the locked hole 42 has a shape into which the distal end side 41 a of the locking claw 41 is fitted.

  As described above, the locking claw 41 and the locked hole 42 forming the locking means 40 are accurately fixed in place when the locking claw 41 rotates in one direction in which the taper of the tip end side 41a is inclined. The locking claw 41 is fitted into the locked hole 42 and engaged with the locking claw 41 in the case main body 11 as the cover member 21 rotates in the other direction relatively. It becomes a state. In this locked state, the rotation of the cover member 21 in both the forward and reverse directions with respect to the case body 11 is restricted. In particular, the rotation of the cover member 21 in the other direction relative to the case body 11 that is not restricted by the connecting means 30 is restricted.

  As described above, the angle of the portion hooked on the inner edge of the locked hole 42 at the front end 41a of the locking claw 41 is a right angle, and once fitted in the locked hole 42, it cannot be removed as it is. Therefore, the tool T can be removed by inserting the tool T from the outside of the locked hole 42 and applying a force in a direction to remove the locking claw 41 against elasticity. However, if the tool T is pulled out in the direction in which it is inserted, the locking claw 41 is engaged with the locked hole 42 again. As will be described in detail later, the light source unit 50 is set so that the snap-fit engagement is released only by an operation with the tool T, and the release is maintained thereafter.

Next, the waterproof structure in the case 10a of the illumination lamp 10 will be described.
A groove 27 extending in the circumferential direction is formed between narrow flanges arranged vertically along the outer peripheral side of the opening 24 of the cover member 21. A seal member 28 made of an elastic body is embedded in the groove portion 27. The seal member 28 is provided in an annular shape along the opening 24, and a part of the outer periphery of the circular cross section protrudes outside the groove 27.

  As shown in FIG. 7, in the assembled state of the case 10 a, the outer periphery of the groove portion 27 that protrudes outside the groove portion 27 is elastically adhered to the inner peripheral surface of the peripheral wall portion 13 of the opposing case body 11. The space between the openings 14 and 24 is sealed. Thereby, the waterproofness inside the case 10a can be ensured, and it becomes suitable for use in a bathroom or the like.

Next, the light source unit 50 disposed in the case body 11 will be briefly described.
The light source unit 50 is configured by mounting a plurality of LEDs 52 on the surface of a circular substrate 51 sized to fit inside the bottom surface portion 12. Here, the substrate 51 is a general printed wiring board, and the LED 52 is specifically a surface-mount type LED chip, for example. Of course, you may use the LED lamp which embedded the light emitting element in the substantially bullet-shaped mold. The surface of the substrate 51 is preferably coated with a waterproof resin so as to cover the LEDs 52 as well.

  In addition, a connector for connecting various wirings such as an electric wire and a signal line is provided at an appropriate place such as the back side of the substrate 51 although not shown. Here, the various wirings connected to the connector lead to the outside through the insertion holes in the bottom surface portion 12 of the case main body 11 described above, and electric signals are input to and output from the illumination lamp 10 through various wirings. Is called.

Next, the operation of the illumination lamp 10 according to the present embodiment will be described.
When constructing the illumination lamp 10 in a bathroom, first, the case main body 11 is fixed to a wall surface such as a ceiling with screws or the like, and the opening 14 of the case main body 11 is combined so as to be covered with a cover member 21. In the state in which the openings 14 and 24 of the case body 11 and the cover member 21 are fitted, the locking portion 31 of the case body 11 that forms the connecting means 30 is caused to change in the cover member 21 by a change in the relative rotational position of each other. Engage / disengage with the locked portion 32.

  As shown in FIGS. 8 and 9, the case main body 11 is set at a rotational position where the locking portion 31 of the cover member 21 does not overlap in the axial direction with respect to the locked portion 32 of the case main body 11 that has already been fixed. The opening 24 of the cover member 21 is fitted inside the opening 14. Then, when the cover member 21 is rotated clockwise in FIG. 8 with respect to the case body 11, the locking portion 31 is moved relative to the locked portion 32 as shown in FIGS. 12 and 13. Thus, the engaged state overlaps in the axial direction.

  Accordingly, the openings 14 and 24 of the case main body 11 and the cover member 21 are restricted from being separated from each other in the axial direction. Here, the locking part 31 and the locked part 32 are provided in pairs at positions that face each other in the diameter direction. That is, since a plurality of peripheral positions are provided at intervals in the circumferential direction, a stable engagement state can be maintained. Moreover, it is possible to easily engage and disengage each other only by rotating one of the two members 11 and 21.

  Further, as shown in FIG. 10, the tip 31a of the locking part 31 is inclined, and when the locking part 31 overlaps the locked piece 32b of the locked part 32, the edges collide with each other. Is avoided. Further, when the engaging portion 31 and the locked portion 32 are overlapped with each other, the tip 31a of the locking portion 31 abuts against the rotation restricting piece 32c of the locked portion 32. Rotation is regulated. As a result, the rotational direction and positioning for the engaged state and the disengaged state in the connecting means 30 are clarified, and positional deviation in one direction after the rotation can be prevented.

  When the connecting means 30 is engaged, the locking means 40 is simultaneously locked. That is, as shown in FIGS. 12 and 13, in the lock means 40, when the relative rotation position where the locking portion 31 is engaged with the locked portion 32 of the connecting means 30 is changed, the case is accompanied accordingly. A locking claw 41 in the main body 11 engages with a locked hole 42 in the cover member 21 by snap fit. As a result, the relative rotation of the openings 14 and 24 in both forward and reverse directions is restricted, and the engagement state by the connecting means 30 is maintained so as not to be inadvertently removed.

  As shown in FIGS. 9 and 11, the distal end side 41 a of the locking claw 41 is inclined in a taper shape, so that when it comes into contact with one end side of the tongue piece portion 26 having the locked hole 42, it moves downward. It smoothly elastically deforms and elastically slidably contacts the peripheral surface of the locked hole 42, and when it matches the locked hole 42, it is fitted by a resilient force to be locked. At this time, since one end side of the tongue piece part 26 contacts the stopper 15a in the storage part 15, rotation in one direction is restricted at the position. Such positioning can prevent the locking claw 41 from getting over the locked hole 42.

  The holding angle of the portion hooked by the locking claw 41 into the locked hole 42 is an angle that cannot be removed as it is once fitted, but the tool T is inserted from the outside of the locked hole 42 so that the locking claw 41 By applying a force in the direction of releasing against the elastic force, the force is released from the locked hole 42 and the lock is released. Thus, only when the tool T is used, it is possible to displace from the locked state to the unlocked state, and the cover member 21 can be separated from the case main body 11.

  Specifically, as shown in FIG. 16A, when the tool T is inserted into the locked hole 42 from the outside, the tip of the tool T removes the locking claw 41 from the locked hole 42 and the guide portion 43. Is directed diagonally in one direction. At this time, as shown in FIG. 16B, the lock means 40 is still in the engaged state.

  Subsequently, as shown in FIG. 17A, when the tool T is raised in one direction with the tip of the tool T in contact with the concave groove 43a in the storage portion 15 as a fulcrum, along with the movement of the tool T When the inner edge of the locked hole 42 is pushed in one direction, the force applied to the locked hole 42 acts as a force for rotating the cover member 21 in one direction with respect to the case body 11.

  Thus, the cover member 21 with the locked hole 42 is inserted by inserting the tool T into the locked hole 42 and shifting the rotational positions of the openings 14 and 24 by the lever principle using the lever principle. The locking claw 41 rides on the periphery of the locked hole 42 (the back surface of the tongue piece portion 26) and easily rotates to the position where the unlocked state where the locking claw 41 is removed from the locked hole 42 is maintained. To do. At this time, as shown in FIG. 17 (b), the locking means 40 is also in a detached state at the same time.

  According to such an operation by the tool T, the snap-fit engagement is not temporarily released only during the operation of the tool T, but the tool T is subsequently removed from the locked hole 42 by shifting the rotational position. However, the released state is maintained as it is. Therefore, it is not always necessary to separate the case main body 11 and the cover member 21 at the same time as the operation with the tool T. The case main body 11 and the cover member 21 may be separated after the operation with the tool T is finished. In addition, since the engagement of the connecting means 30 is simultaneously released only by the releasing operation of the locking means 40, the work of separating the case body 11 and the cover member 21 can be further simplified.

  According to the above assembly structure, the number of parts can be reduced and the cost can be reduced as compared with the case where the case main body 11 and the cover member 21 are combined via screws, and the work of assembling or separating each other is easy. The work time can be shortened. Moreover, if the user does not intend to prepare and remove the tool T, there is no possibility that it will be inadvertently released.

  Therefore, when applied to the illuminating lamp 10 using an LED as a light source as in the present embodiment, it is possible to satisfy the design considerations of related laws and regulations. In addition, it is possible to simplify and improve the efficiency of removing and attaching the cover member 21 when performing maintenance and inspection inside the case 10a (mainly the light source unit 50).

  By the way, according to the above-described embodiment, the locking portion 31 and the locked portion 32 of the connecting means 30 are arranged inside the case 10a and configured not to protrude on the outer surface. The locking claw 41 and the locked hole 42 of the locking means 40 are respectively provided in the storage portion 15 and the tongue piece portion 26 protruding on the outer surface of the case 10a.

  Therefore, as a modified example of another embodiment, the locking claw 41 and the locked hole 42 of the locking means 40 may be arranged inside without protruding over the outer surface of the case 10a. good. Specifically, for example, as shown in FIGS. 18 to 20, by providing a locking claw 410 and a locked hole 420 of the locking unit 400 in the peripheral wall portions 13 and 23 of the two members 11 and 21, respectively. It can be set as the structure which does not protrude on the outer surface of case 10a.

  More specifically, in this modification, the peripheral wall 23 of the cover member 21 is combined with the outer side of the case main body 11 so that the opening 24 of the cover member 21 is fitted to the outer side of the case main body 11 instead of the inner side. It will be in the state which covers the surrounding wall part 13 from the outer side. Below the one end side of the peripheral wall portion 13 of the case body 11, the locking claw 410 is provided so as to face the radially outer side and bend radially inward. A locked hole 420 is provided below the one end side of the peripheral wall portion 23 of the cover member 21 so that the locking claw 410 is engaged by snap fitting.

  Further, the tool T inserted from the outside of the locked hole 420 is locked from the locked hole 420 at a position facing the front end side of the locking claw 410 on the peripheral wall portion 13 of the case body 11. A guide portion 430 is provided for guiding the member obliquely in one direction while removing the claw 410, and the guide portion 430 is provided so as to be recessed in the cross-sectional shape illustrated in the radial direction at the peripheral wall portion 13. . The connecting means 30 has the same configuration as that of the above-described embodiment although not shown.

  According to such a locking means 400, when the relative rotation position at which the locking part 31 engages with the locked part 32 of the coupling means 30 (not shown) is changed, the locking claw 410 is accordingly moved. Engage with the locked hole 420 by snap fit. As a result, the relative rotation of the openings 14 and 24 in both forward and reverse directions is restricted, and the engagement state by the connecting means 30 is maintained so as not to be inadvertently removed.

  As shown in FIG. 19A, since the front end side of the locking claw 410 is inclined in a tapered shape, the inner side of the peripheral wall portion 23 of the cover member 21 until the engagement with the locked hole 420 is reached. Smoothly contacts the wall surface in the direction of the arrow in the figure. As shown in FIG. 19B, when the locked hole 420 matches the locked hole 420, the locked hole 420 is engaged by a resilient force to be locked. At this time, the stopper 441 protruding behind the locking claw 410 abuts on the step portion 442 in front of the locked hole 420, so that rotation in one direction is restricted at this position. Such positioning can prevent the locking claw 410 from getting over the locked hole 420.

  When the locking means 400 is in the locked state, the tool T is inserted from the outside of the locked hole 420, and a force is applied in a direction in which it is released against the elastic force of the locking claw 410. It comes out of the hole 420 and enters the unlocked state. That is, as shown in FIG. 20A, when the tool T is inserted into the locked hole 420 from the outside, the tip of the tool T is removed by the guide portion 430 while the locking claw 410 is removed from the locked hole 420. Guided diagonally in the direction.

  Subsequently, as shown in FIG. 20B, when the tool T is raised in the direction of the arrow in the drawing with the tip of the tool T in contact with the bottom of the guide portion 430 as a fulcrum, the tool T moves along. When the inner edge of the locked hole 420 is pushed in one direction, the force applied to the locked hole 420 acts as a force for rotating the cover member 21 in one direction with respect to the case body 11. The basic principle is the same as that of the locking means 40 described above.

  As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the present invention can be modified or added without departing from the scope of the present invention. Included in the invention. For example, the locking portion 31 and the locked portion 32 of the connecting means 30 are also provided on the peripheral wall portions 13 and 23 of the two members 11 and 21 so as to engage with each other in the radial direction instead of the axial direction. You may comprise.

  The case main body 11 and the cover member 21 which are two members are not particularly limited in specific shape, but are provided with cylindrical openings 14 and 24 which are fitted to each other. Here, each of the openings 14 and 24 has a cylindrical shape, but at least one member has a shape close to a disk with a minimum height of the peripheral wall, regardless of the height of the peripheral wall portions 13 and 23. It is also good.

  Moreover, in the said embodiment, although the latching | locking part 31 and the to-be-latched part 32 of the connection means 30 were provided in the position which opposes a diameter direction, these numbers are not limited only to 2 sets. Three or more sets may be provided at intervals in the circumferential direction. Further, the snap-fit structure of the locking claw 41 and the locked hole 42 of the locking means 40 is not limited to the above-described embodiment, and any shape can be used as long as it can be locked using elasticity. May be changed as appropriate.

  Moreover, in the said embodiment, although the latching | locking part 31 of the connection means 30 was provided in the cover member 21, and the to-be-latched part 32 was provided in the case main body 11, as a reverse aspect, the latching | locking part 31 is a case. It may be provided in the main body 11 and the locked portion 32 may be provided in the cover member 21. Similarly, the locking claw 41 of the locking means 40 may be provided in the cover member 21 and the locked hole 42 may be provided in the case main body 11.

  Moreover, in the said embodiment, although the lighting fixture 10 was demonstrated to the example provided with the waterproof property installed in a bathroom etc., this is only a mere illustration and, for example, waterproof property is provided without providing the sealing member 28. An illumination lamp that is not provided may be used. Of course, the object to which the assembly structure of the two members is applied is not limited to the illumination lamp.

  Furthermore, the two members 11 and 21 do not need to have a bottomed structure in which the opposite sides of the openings 14 and 24 are closed, and can be applied to a combination of, for example, tubular members. Each of the openings 14 and 24 has a cylindrical shape. Here, the cylindrical shape does not matter whether the height of the peripheral wall is large or small. For example, at least in the case body 11, the height of the peripheral wall is minimized. It is good also as a shape near.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as an assembly structure for detachably combining two members having cylindrical openings that fit into each other, and is particularly suitable for use in a case structure of an illumination lamp. .

DESCRIPTION OF SYMBOLS 10 ... Illuminating lamp 10a ... Case 11 ... Case main body 12 ... Bottom part 13 ... Perimeter wall part 14 ... Opening part 15 ... Storage part 21 ... Cover member 22 ... Front part 23 ... Peripheral wall part 24 ... Opening part 25 ... Flange part 26 ... Tongue Single-piece 27 ... Groove 28 ... Sealing member 30 ... Connecting means 31 ... Locking part 32 ... Locked part 40 ... Locking means 41 ... Locking claw 42 ... Locked hole 43 ... Guide part 43a ... Groove 50 ... Light source Unit 51 ... Board 52 ... LED
400 ... Locking means 410 ... Locking claw 420 ... Locked hole 430 ... Guide part

Claims (8)

In an assembly structure for detachably combining two members having cylindrical openings that fit together,
Due to a change in the relative rotational position in a state where the openings of the two members are fitted together, the locking portion provided in one of the members is engaged with the locked portion provided in the other member. A coupling means for restricting detachment in the axial direction serving as a rotation center of each opening when the latching portion engages with the latched portion;
When the two members change to a relative rotational position where the locking portion engages with the locked portion, a locking claw provided on one of the members is provided on the other member. The engagement hole is engaged by a snap fit to restrict relative rotation of the openings, and a predetermined tool is inserted into the engagement hole, and the rotation position is adjusted by the tool. And a locking means for releasing the engagement by the snap fit only by a shifting operation and maintaining the release thereafter.   The operation of shifting the rotational position by the tool not only releases the engagement of the locking means by snap fit, but also releases the engagement by releasing the locking portion from the locked portion in the connecting means. The assembly structure according to claim 1, wherein:   The locking portion and the locked portion in the coupling means are provided in a plurality of relative positions that are slidably engaged with each other in a state of overlapping with each other in the axial direction. The assembly structure according to claim 1 or 2, wherein the assembly structure is displaced between an engagement state overlapping in an axial direction and a disengagement state not overlapping each other in the axial direction.   The locking part and the locked part in the connecting means are either forward or reverse with respect to the other member with the locked part when one member with the locked part is in the engaged state. The assembly structure according to claim 3, wherein rotation in one direction is restricted.   The locking claw in the locking means has a tip end side that comes into sliding contact with the peripheral surface of the locked hole is inclined in a taper shape, and is fitted into the locked hole with the rotation in the inclined direction. The locked state is engaged with the locked hole and engaged, and the unlocking is released from the locked hole by being pushed by the tool inserted from the outside of the locked hole. The assembly structure according to claim 1, 2, 3, or 4, wherein the assembly structure is displaced to a state. At the position facing the leading end of the locking claw on the member with the locking claw, a tool inserted from the outside of the locked hole is removed while the locking claw is removed from the locked hole. A guide portion is provided for obliquely guiding in the one direction;
With the tip of the tool guided to the guide portion as a fulcrum, when the tool is raised in the one direction, the locked hole is pushed in the one direction along with the movement of the tool, 6. The assembly structure according to claim 5, wherein the member having the locked hole is set to rotate to a position where the unlocked state is maintained. An illuminating lamp comprising the assembly structure of two members according to claim 1, 2, 3, 4, 5, or 6.
The one member is a case main body of an illumination lamp that houses a light source therein, and the other member is a cover member that is detachably combined with the case main body in a state of covering the light source,
The case main body and the cover member are combined together in a state in which the respective openings are fitted with each other.   The illumination lamp according to claim 7, wherein a seal member is provided between the opening portions of the case main body and the cover member to maintain the water resistance inside the communication.