JP3184844U - compass - Google Patents

Abstract

Provided is a compass that can be appropriately held by a simple mechanism at a position where a needle is protruded and a position where the needle is stored, and which is not easily deformed or damaged.
A knock member (6) provided with a needle (8) on the distal end side is movably inserted into a storage cylinder part (20) of a central leg (2). A spring 90 that urges the knock member 6 to the opposite side of the needle 8 is provided in the storage cylinder portion 20. A window hole 208 is formed in the storage cylinder portion 20, and a claw portion 707 is formed in the knock member 6. When the knock member 6 is pushed against the urging force of the spring 90, the claw portion 707 is engaged with the edge portion 209 of the window hole 208, and the knock member 6 projects the needle 8 from the storage cylinder portion 20. Held in the protruding position. The knock member 6 is formed with a protrusion 702 that gives a retaining function separately from the claw portion 707.
[Selection] Figure 1

Description

  The present invention relates to a compass that can accommodate a needle.

  Patent Document 1 discloses a compass in which a central needle is provided in a cylindrical portion formed on a needle leg so that the central needle can freely enter and exit. The central needle is provided at the distal end portion of the holding trunk that is movably accommodated in the cylindrical portion. The cylindrical portion is provided with a compression spring, and the holding stem is urged by the compression spring in a direction in which the central needle is drawn into the cylindrical portion and a direction in which the central needle rotates in the circumferential direction of the cylindrical portion. A vertical groove is formed in the cylindrical portion, and a pin that is movably inserted into the vertical groove is provided on the holding trunk. When the holding stem is pushed down, the holding stem is rotated in one direction by the bias of the compression spring, and the pin is locked to the notch formed on one side of the vertical dividing groove of the cylindrical portion. The state which protruded from the cylindrical part is maintained. Further, by rotating the pin against the bias of the compression spring, the pin moves to the upper end position of the vertical dividing groove by the bias of the compression spring, and the center needle is housed in the cylindrical portion. ing.

JP-A-11-240293

  In the compass disclosed in Patent Document 1, when the center needle is housed in the cylindrical portion, the holding stem is prevented from coming out of the cylindrical portion by the pin hitting the upper end of the vertical dividing groove. However, the pin also serves as a portion that is locked to the tubular portion when the central needle protrudes from the tubular portion. That is, the pin has both a function of preventing the holding stem from being removed and a function of holding the holding stem when the central needle is protruded. For this reason, it is difficult to properly exhibit the function of retaining the holding trunk and the function of holding the holding trunk when the central needle is protruded. Further, a repeated force may be applied to the pin, which may cause deformation or breakage.

  The present invention has been made in view of the above circumstances, and provides a compass that can be appropriately held by a simple mechanism at a position where the needle is protruded and at a stored position, and which is not easily deformed or damaged. This is the issue.

  In order to solve the above problems, the compass 1 of the present invention includes a storage cylinder portion 20 provided on the center leg 2 and a knock member 6 provided with a needle 8 on the distal end side. The cylinder 20 is inserted so as to be movable in the axial direction of the storage cylinder 20, and the storage cylinder 20 is provided with a biasing means for biasing the knock member 6 to the side opposite to the needle 8. An engaging portion is formed in the cylindrical portion 20 and an engaged portion is formed in the knock member 6, and when the knock member 6 is pushed against the urging force of the urging means, the covered portion is formed. A state where the engaging part is engaged with the engaging part, the knock member 6 is held at the protruding position where the needle 8 protrudes from the storage cylinder part 20, and the knock member 6 is arranged at the protruding position. When the engagement of the engaged portion is released, the knock member 6 is In the compass 1 that moves the needle 8 to the storage position in which the needle 8 is stored in the storage cylinder portion 20 by the urging force of the knocking member, the knock member 6 is formed with a stopper portion that is different from the engaged portion, and the storage cylinder The part 20 is provided with a retaining part for preventing the knock member 6 arranged at the storage position from coming out of the storage cylinder part 20 to the side opposite to the needle 8 by coming into contact with the to-be-prevented part. It is characterized by that.

  Further, the knock member 6 is formed with a second to-be-engaged portion different from the to-be-engaged portion and the to-be-removed portion, and the storage cylinder portion 20 is brought into contact with the second to-be-retained portion. It is preferable that a second retaining portion for preventing the knock member 6 from coming out of the storage tube portion 20 to the side opposite to the needle 8 is provided.

  Further, a window hole 208 penetrating the peripheral wall portion of the storage cylinder portion 20 is formed in the storage cylinder portion 20, and the engagement portion is configured by an edge portion of the window hole 208 opposite to the needle 8, An unlocking member 92 is provided on one of the legs 2 and 3 of the center leg 2 and the rotating leg 3 rotatably connected to the center leg 2, and the knock member 6 is disposed at the protruding position. In this state, when both the legs 2 and 3 of the center leg 2 and the rotating leg 3 are closed, the engaged portion disposed in the window hole 208 is engaged with the engagement release member 92. It is preferable to push it to a position where the engagement with the mating part is released.

  In the present invention, the engagement between the engaged portion formed on the knock member and the engagement portion formed on the storage cylinder portion holds the knock member disposed at the protruding position, and the knock member is covered with the engagement portion. Preventing the knock member disposed at the storage position from slipping out toward the center leg rotation center side by contacting the stopper portion provided in the storage cylinder portion with the stopper portion formed separately from the engaging portion. Can do. Therefore, the knock member disposed at the protruding position can be appropriately held by, for example, making the engaged portion of the knock member suitable for the corresponding engaging portion, and the engaged member of the knock member The knocking member arranged at the storage position is properly removed from the storage cylinder part toward the center leg rotation center side by making the to-be-stopped part formed separately from the part into a shape suitable for the corresponding prevention part. Can be prevented. In addition, since the engaged portion and the removal-preventing portion are separately formed in the knock member, it is possible to reduce the force applied to the engaged portion and the removal-preventing portion as the needle is taken in and out of the storage cylinder portion. For this reason, it is possible to suppress deformation and breakage of the engaged portion and the stopper portion.

The principal part of the center leg of the compass in 1st embodiment of this invention is shown, (a) is a front view when a knock member is arrange | positioned in a storage position, (b) is a cross section when a knock member is arrange | positioned in a storage position FIG. 4C is a front view when the knock member is arranged at the protruding position, and FIG. 4D is a cross-sectional view when the knock member is arranged at the protruding position. It is a front view of a compass same as the above. It is a front view of a knock member same as the above. The compass of 2nd embodiment is shown, (a) is a front view which shows the state which has arrange | positioned the latch release member in the pushing position, (b) is the front view which shows the state which has arrange | positioned the latch release member in the use position (C) is a front view showing a state in which the unlocking member is arranged at the non-use position.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. As shown in FIG. 2, the compass 1 according to the first embodiment is capable of rotating the longitudinal end portions of the center leg 2 and the rotary leg 3 to a shaft support member 4 on which a knob 40 projects. The legs 2 and 3 are openable and closable around the shaft support member 4. As in the case of a general compass, the compass 1 opens both legs 2 and 3, places the needle 8 provided on the center leg 2 on the paper surface, picks the knob 40, and rotates the rotary leg 3 around the center leg 2. By rotating, it is possible to draw a circle or an arc on the paper surface with a writing instrument provided on the rotary leg 3.

  Both legs 2 and 3 are made of metal, and are manufactured by die casting, for example. An attachment portion 30 to which a pencil 5 as a writing instrument can be detachably attached is formed at the distal end portion (the end portion opposite to the shaft support member 4) of the rotating leg 3. The attachment portion 30 protrudes from the distal end portion of the rotating leg 3 toward the side opposite to the central leg 2. The attachment portion 30 is formed with an insertion hole 300 that is inclined so as to approach the center leg 2 side as it goes to the distal end side of the rotating leg 3.

  A male screw portion 301 is formed on the outer periphery of the protruding end portion of the attachment portion 30. The fastening member 31 is attached to the male screw portion 301. The tightening member 31 has a ring shape and is formed with an internal thread portion 310 on the inner periphery. The tightening member 31 is attached to the attachment portion 30 by screwing the female screw portion 310 with the male screw portion 301 of the attachment portion 30. The tightening member 31 can be moved closer to the center leg 2 side or away from the center leg 2 by changing the screwing depth with respect to the male screw portion 301.

  In order to attach the pencil 5 to the attachment portion 30, after the pencil 5 is inserted into the insertion hole 300, the fastening member 31 screwed into the attachment portion 30 is tightened, and the pencil 5 is attached to the attachment portion 30 by the fastening member 31. Press against the side surface of the insertion hole 300 on the center leg 2 side. In order to remove the pencil 5 attached to the attachment portion 30, the fastening member 31 screwed into the attachment portion 30 is loosened, and then the pencil 5 is pulled out from the insertion hole 300. In the present embodiment, the pencil 5 is provided at the tip of the rotary leg 3, but other writing tools such as a writing core and a mechanical pencil may be provided instead of the pencil 5.

  A storage tube portion 20 for storing the needle 8 so as to be freely retractable is formed at the distal end portion of the center leg 2 (the end portion on the side opposite to the shaft support member 4). The axial direction of the storage cylinder portion 20 is substantially parallel to the longitudinal direction of the center leg 2 and, more specifically, is slightly inclined so as to be positioned closer to the rotary leg 3 as it goes to the distal end side of the center leg 2. As shown in FIGS. 1B and 1D, a storage hole 200 opened on the distal end side of the center leg 2 and the rotation center side (the shaft support member 4 side) is formed inside the storage cylinder portion 20. Is formed.

  The knock member 6 is stored in the storage hole 200 of the storage cylinder portion 20. The knock member 6 includes a moving body 7 that is long in the axial direction of the storage cylinder portion 20 and a needle 8 that is provided on the distal end side of the center leg 2 of the moving body 7.

  The movable body 7 is a resin molded product, and includes a slide portion 70 that is slidably stored in the axial direction of the storage cylinder portion 20, and an end portion on the distal end side of the central leg 2 of the slide portion 70 from the distal end side of the central leg 2. It is comprised with the needle | hook connection part 71 which protruded integrally toward. The terminal end side of the sharpened needle 8 is embedded and connected to the needle connecting portion 71 that is the tip of the moving body 7. The distal end side of the needle 8 protrudes from the needle connecting portion 71 toward the distal end side of the center leg 2.

  A spring 90 as an urging means is accommodated in a portion on the distal end side of the center leg 2 of the storage cylinder portion 20. The spring 90 is a coil spring, and a needle connecting portion 71 is inserted inside thereof. The distal end side of the center leg 2 of the spring 90 is received by a step surface 202 formed on the inner surface of the end portion of the storage cylinder portion 20 on the distal end side of the center leg 2. The rotation center side of the center leg 2 of the spring 90 (the side opposite to the needle 8) is received by the end surface of the slide part 70 on the tip end side (needle 8 side) of the center leg 2. The spring 90 is a push spring, and biases the slide portion 70 of the knock member 6 to the side opposite to the needle 8 (center leg 2 rotation center side). In this embodiment, the urging means for urging the knock member 6 to the side opposite to the needle 8 is configured by the spring 90, but the urging means is not limited to this, for example, other springs other than the coil spring, It may be an elastic body such as rubber.

  The slide portion 70 is obtained by integrally connecting a portion on the needle 8 side (tip side of the center leg 2) and a portion on the opposite side of the needle 8 with a connection piece portion 700 located on the opposite side to the center leg 2.

  As shown in FIG. 3, a protruding piece portion 701 that protrudes toward the needle 8 is formed on the side of the rotating leg 3 on the side of the slide portion 70 opposite to the needle 8. A protrusion 702 that protrudes in a direction orthogonal to the opening / closing surface of both legs 2 and 3 (the rotation surface of the center leg 2) is formed at the protruding end of the protruding piece 701.

  As shown in FIG. 1, the peripheral wall of the storage cylinder portion 20 on the center leg 2 rotation center side is long in the axial direction of the storage cylinder portion 20 and penetrates in a direction perpendicular to the opening and closing surfaces of both legs 2 and 3. A slide hole 203 is formed. The protrusion 702 of the knock member 6 is inserted into the slide hole 203 so as to be slidable in the axial direction of the storage cylinder portion 20 (longitudinal direction of the slide hole 203).

  The knock member 6 can move in the axial direction of the storage cylinder portion 20 within a range where the protrusion 702 is located from the end of the slide hole 203 on the center leg 2 rotation center side to the end of the center leg 2 tip side. ing.

  As shown in FIG. 1A, when the knock member 6 is disposed at the storage position where the needle 8 is stored in the storage cylinder portion 20, the protrusion 702 of the knock member 6 that receives the biasing force of the spring 90 is stored in the storage position. The slide part 203 of the cylinder part 20 contacts the edge part 204 on the center leg 2 rotation center side. That is, the edge portion 204 of the slide hole 203 serves to hold the knock member 6 disposed at the storage position. Further, the edge portion 204 of the slide hole 203 constitutes a retaining portion for preventing the knock member 6 disposed at the storage position from slipping out from the storage cylinder portion 20 to the side opposite to the needle 8.

  A guide hole 703 is formed in a portion of the slide portion 70 opposite to the needle 8. The guide hole 703 is long in the axial direction of the storage cylinder portion 20 and penetrates in a direction perpendicular to the open / close surfaces of the legs 2 and 3.

  A rivet 91 that is parallel to the direction perpendicular to the opening and closing surfaces of the legs 2 and 3 is installed between the opposing wall portions at the end of the storage cylinder portion 20 on the center leg 2 rotation center side.

  The rivet 91 is inserted into a rivet hole formed at a position opposite to the peripheral wall portion of the storage cylinder portion 20 through the shaft portion 910, and the end of the shaft portion 910 opposite to the head portion 911 (see FIG. 2) of the rivet 91. It is attached to the storage cylinder part 20 by caulking the part.

  The shaft portion 910 of the rivet 91 is inserted into the guide hole 703 of the knock member 6 so as to be slidable in the axial direction of the storage tube portion 20. Thereby, the knock member 6 is slidable in the axial direction of the storage cylinder portion 20 in a state where the rotation in the circumferential direction is restricted.

  As shown in FIG. 1 (b), when the knock member 6 is disposed at the storage position where the needle 8 is stored in the storage cylinder portion 20, the shaft portion 910 of the rivet 91 is the end of the guide hole 703 on the needle 8 side. And is opposed to the edge of the guide hole 703 on the needle 8 side. For this reason, when the knock member 6 arranged at the storage position tries to move in a direction to come out from the storage cylinder portion 20 to the side opposite to the needle 8, the edge portion 704 of the guide hole 703 on the needle 8 side is rivet 91. The shaft portion 910 comes into contact with the needle 8 side. In other words, in the present embodiment, the edge portion 704 of the guide hole 703 forms a second to-be-prevented portion, and the knock member 6 disposed at the storage position by the shaft portion 910 of the rivet 91 installed on the storage cylinder portion 20 A second retaining portion for preventing the housing tube portion 20 from coming out to the side opposite to the needle 8 is configured. Note that the shaft portion 910 of the rivet 91 may abut against the edge portion 704 of the guide hole 703 when the knock member 6 is disposed at the storage position. You may arrange | position in the vicinity of the edge part 704, without contacting.

  The end portion of the slide portion 70 opposite to the needle 8 is a pressing portion 705 that is pressed by a user's finger when the knock member 6 is pushed into the needle 8 side. The pressing part 705 protrudes from the storage cylinder part 20 toward the side opposite to the needle 8. The outer peripheral portion of the pressing portion 705 protrudes more outward than the inner peripheral surface of the storage tube portion 20. When the knock member 6 arranged at the storage position is pushed into the needle 8 side by a predetermined amount, the protruding portion abuts against the end surface of the storage cylinder portion 20 on the center leg 2 rotation center side, and the knock member 6 It functions as a stopper portion that prevents it from being pushed in.

  On the end of the slide portion 70 on the needle 8 side, a projecting piece portion 706 that protrudes on the opposite side of the needle 8 is formed on the rotating leg 3 side. At the projecting end of the projecting piece 706, a claw 707 projecting toward the rotating leg 3 is formed as an engaged part. The projecting piece 706 is located on the center leg 2 side of the connecting piece 700 with a gap. Due to this gap, the projecting piece 706 can be bent and deformed to the opposite side of the rotating leg 3.

  The end of the protruding piece 706 on the claw 707 side is a free end, and the thickness direction of the protruding piece 706 is substantially parallel to the protruding direction of the claw 707. Thereby, the protruding piece part 706 is easily elastically deformed to the opposite side to the protruding direction of the claw part 707.

  A window hole 208 penetrating in the thickness direction of the wall portion is formed in the wall portion of the storage cylinder portion 20 on the rotating leg 3 side. The edge 209 on the central leg 2 rotation center side of the window hole 208 in the storage cylinder portion 20 is located when the knock member 6 is disposed at a protruding position where the needle 8 protrudes from the storage cylinder portion 20 toward the distal end side of the central leg 2. An engaging portion to which the claw portion 707 (engaged portion) of the knock member 6 is engaged is configured. Further, the inner surface of the storage tube portion 20 on the center leg 2 rotation center side of the window hole 208 is an inclined surface 201 that is inclined so as to be positioned inside the storage tube portion 20 as the window hole 208 is approached.

  As shown in FIGS. 1 (a) and 1 (b), from the state in which the needle 8 is stored in the storage cylinder part 20 to the state in which the needle 8 protrudes from the storage cylinder part 20 to the distal end side of the center leg 2. Then, with the fingers, the pressing portion 705 of the knock member 6 is pressed against the needle 8 against the urging force of the spring 90, and the knock member 6 is moved to the protruding position as shown in FIGS. 1 (c) and 1 (d). Move. By doing in this way, the claw part 707 of the knock member 6 is pressed by the inclined surface 201 of the storage cylinder part 20, and the protruding piece part 706 is bent and deformed inside the storage cylinder part 20. Then, when the claw portion 707 gets over the inclined surface 201 and is disposed at a position corresponding to the window hole 208, the protruding piece portion 706 is elastically restored, whereby the claw portion 707 enters the window hole 208 and enters the window hole 208. Is engaged with the edge 209. Thus, by engaging the claw portion 707, the movement of the knock member 6 to the side opposite to the needle 8 is restricted, and the knock member 6 is held at the protruding position.

  As shown in FIGS. 1 (c) and 1 (d), the needle 8 is shown in FIGS. 1 (a) and 1 (b) from a state in which the needle 8 protrudes from the storage cylinder portion 20 toward the distal end side of the central leg 2. In order to keep the needle 8 in the storage cylinder part 20 as described above, the fingernail part 707 exposed from the window hole 208 to the outside of the storage cylinder part 20 is pressed toward the inside of the storage cylinder part 20 with fingers. Thus, the projecting piece 706 is bent and deformed to the opposite side of the rotary leg 3 to move the claw 707 to a position where the engagement with the edge 209 of the window hole 208 is released. If it does in this way, as shown in Drawing 1 (a) and Drawing 1 (b), knock member 6 will move to center leg 2 rotation center side by the urging force of spring 90, and will be arranged in a stowed position. . Further, at this time, the protruding piece portion 706 is elastically restored, and the claw portion 707 is disposed along the inclined surface 201 of the storage cylinder portion 20.

  As described above, in the compass 1 of this embodiment, the knock member 6 is provided with a to-be-prevented portion (projection 702) different from the engaged portion (claw portion 707). A stopper (edge 204 of the slide hole 203) is provided to prevent the knock member 6 arranged at the storage position from coming out of the storage cylinder 20 to the side opposite to the needle 8 by contacting the stopper. Yes. Accordingly, the knock member 6 disposed at the protruding position by the engagement between the engaged portion formed on the knock member 6 and the engaging portion (the edge portion 209 of the window hole 208) formed on the storage cylinder portion 20. And the stopper member formed separately from the engaged portion on the knock member 6 abuts against the stopper portion provided in the storage cylinder portion 20, so that the knock member 6 disposed at the storage position becomes the needle 8. Can be prevented from slipping out to the opposite side. Therefore, the knock member 6 disposed at the protruding position can be appropriately held by, for example, making the engaged portion of the knock member 6 a shape suitable for the corresponding engaging portion, and the knock member 6 The knock member 6 disposed at the storage position is pulled out from the storage cylinder portion 20 to the opposite side of the needle 8 by making a to-be-stopped portion formed separately from the engaged portion into a shape suitable for the corresponding stop portion. This can be prevented appropriately. Further, since the engaged portion and the removal-preventing portion are separately formed in the knock member 6, the force applied to the engaged portion and the removal-preventing portion as the needle 8 is put in and out of the storage cylinder portion 20 can be reduced. For this reason, it is possible to suppress deformation and breakage of the engaged portion and the stopper portion.

  In the present embodiment, the knock member 6 is formed with a second stopper portion (the edge portion 704 of the guide hole 703) different from the engaged portion and the stopper portion, and the storage cylinder portion 20 has the second stopper portion. A second retaining portion (shaft portion 910 of the rivet 91) is provided to prevent the knock member 6 from coming out to the side opposite to the needle 8 by coming into contact with the portion to be removed. For this reason, the knock member 6 coming out of the storage cylinder portion 20 toward the center of rotation of the center leg 2 is a contact with the retaining portion of the retaining portion and a contact with the second retaining portion of the second retaining portion. Can prevent double.

  Next, a second embodiment different from the first embodiment will be described. In the following description, the same components as those in the first embodiment are given the same numbers, and redundant descriptions are omitted.

  The compass 1 of the present embodiment shown in FIG. 4 is provided with an unlocking member 92 on the center leg 2 and when both the legs 2 and 3 are closed with the knock member 6 arranged at the protruding position. The claw portion 707 disposed in the window hole 208 is pushed by the stop release member 92 to a position where the engagement with the edge portion 209 of the window hole 208 is released.

  A pivotal support portion 21 that protrudes toward the rotating leg 3 is formed on the side of the storage tube 20 of the center leg 2. The unlocking member 92 has a slightly curved rod shape, and one end thereof is rotatably connected to the pivotal support portion 21 of the center leg 2. The unlocking member 92 has a rotation axis direction parallel to the rotation axis direction of both legs 2 and 3, and rotates along the opening and closing surfaces of both legs 2 and 3 around the end on the pivotal support portion 21 side. It is supposed to be.

  As shown in FIG. 4 (c), the unlocking member 92 is disposed at a non-use position along the surface on the rotating leg 3 side of the portion of the center leg 2 that is closer to the center of rotation than the storage tube portion 20 of the center leg 2. As shown in FIG. 4 (a), it can be freely rotated in a range from the state where it is disposed at the push-in position along the surface on the rotating leg 3 side of the storage cylinder part 20.

  When the locking release member 92 is used, the locking release member 92 is disposed at a use position where the locking release member 92 is rotated toward the distal end side of the central leg 2 and protruded toward the distal end side of the central leg 2 as shown in FIG. The center leg 2 is provided with a biasing means such as a spring for moving the locking release member 92 arranged at the pushing position shown in FIG. 4A to the use position shown in FIG. It is preferable. By doing in this way, the effort which rotates the latch release member 92 arrange | positioned in the pushing position to a use position can be reduced.

  A push-in portion 920 that protrudes toward the front side in the turning direction when turning from the non-use position toward the push-in position is formed at the distal end portion (the end portion opposite to the pivotal support portion 21) of the locking release member 92. Has been.

  As shown in FIG. 4 (b), when both the legs 2 and 3 are closed with the knocking member 6 placed in the protruding position and the unlocking member 92 placed in the use position, it is shown in FIG. 4 (a). As described above, the pivotal support portion 21 side of the unlocking member 92 is pushed into the center leg 2 side by the tip of the rotating leg 3, and the claw portion 707 exposed from the window hole 208 by the pushing portion 920 of the unlocking member 92. Is moved to the position where the engagement between the claw portion 707 and the edge portion 209 of the window hole 208 is released by being pushed inside the storage cylinder portion 20. For this reason, when both the legs 2 and 3 are closed, the engagement between the claw portion 707 and the edge portion 209 of the window hole 208 is released by the locking release member 92, whereby the knock member 6 is moved by the biasing force of the spring 90. It moves to the storage position.

  On the opposing surfaces of both legs 2 and 3, a concave surface 93 is formed that is recessed in a direction away from the other leg. As shown in FIG. 4C, in a state where both legs 2 and 3 are closed, a gap is formed between the concave surfaces 93 of both legs 2 and 3 in which the unlocking member 92 disposed in the non-use position is disposed. ing. Further, a concave portion 94 is formed on the surface of the rotating leg 3 on the side of the central leg 2 so that the pivotal support portion 21 is accommodated when both the legs 2 and 3 are closed.

  As described above, the compass 1 according to the present embodiment has a locking release member when the center leg 2 and both the legs 2 and 3 of the rotating leg 3 are closed in a state where the knock member 6 is disposed at the protruding position. 92, the engaged portion (claw portion 707) disposed in the window hole 208 is pushed to a position where the engagement with the engaging portion (the edge portion 209 of the window hole 208) is released. For this reason, when both the legs 2 and 3 are closed with the knock member 6 disposed at the protruding position, the engaged portion is pushed by the locking release member 92 to release the engagement between the engaged portion and the engaging portion. The knock member 6 can be moved to the storage position. Therefore, when the compass 1 is finished, the needle 8 can be easily stored in the storage cylinder portion 20 without pushing the engaged portion exposed from the window hole 208 with fingers.

  The locking release member 92 may be provided on the rotating leg 3 as long as the engaged portion can be pushed in when the legs 2 and 3 are closed with the knock member 6 disposed at the protruding position. I do not care. In addition, the compass 1 of the present embodiment is formed by forming a to-be-prevented portion different from the engaged portion on the knock member 6 as in the first embodiment. It does not matter even if it also serves as a retaining portion.

  The knock member 6 in each of the above embodiments is formed by integrally connecting the needle 8 with the moving body 7. For example, the needle 8 is disposed on the distal end side of the moving body 7, and the needle 8 is placed in the storage cylinder portion 20. The urging means for urging the moving body 7 toward the moving body 7 side is provided, and when the moving body 7 is pushed into the distal end side of the center leg 2, the needle 8 protrudes from the storage tube portion 20 toward the distal end side of the central leg 2 by the moving body 7. When the engagement between the engaged portion and the engaging portion is released, the movable body 7 is pushed by the needle 8 urged by the urging means, and the central leg 2 together with the needle 8 is moved. You may make it move to the rotation center side.

  Further, in each of the above embodiments, the knock member 6 is pulled out to the side opposite to the needle 8 by the contact of the stopper part with the stopper part and the contact of the second stopper part with the second stopper part. However, the knock member 6 may be prevented from being removed by only one of them.

  In addition, the compass of this embodiment is used to draw a circle or an arc, but the present invention is a kind of compass for measuring the distance between two points by providing needles on both legs. It is also applicable to so-called dividers.

  In addition, the present invention is not limited to the above-described embodiments. For example, the shapes of the engaging portion, the engaged portion, the retaining portion, the retaining portion, the second retaining portion, and the second retaining portion. The design can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Compass 2 Center leg 6 Knock member 8 Needle 20 Storage cylinder part 90 Spring (biasing means)
92 Lock release member 204 Edge of slide hole (prevention part)
208 Window hole 209 Edge (engagement part) of window hole
702 Protrusion (part to be removed)
704 Edge of guide hole (second removal prevention part)
707 Claw (engaged part)
910 Shaft part of rivet (second retaining part)

Claims (3)

A storage tube provided on the center leg;
A knock member provided with a needle on the tip side,
The knock member is inserted into the storage cylinder part so as to be movable in the axial direction of the storage cylinder part,
The storage cylinder portion is provided with a biasing means for biasing the knock member to the side opposite to the needle,
An engaging portion is formed in the storage cylinder portion and an engaged portion is formed in the knock member,
When the knock member is pushed against the urging force of the urging means, the engaged portion is engaged with the engaging portion, and the knock member removes the needle from the storage cylinder portion. Held in the protruding position,
When the engagement of the engaged portion is released in a state where the knock member is disposed at the protruding position, the knock member stores the needle in the storage cylinder portion by the biasing force of the biasing means. In the compass that moves to the storage position,
The knock member is formed with a stopper portion that is different from the engaged portion, and the knock member disposed at the storage position by contacting the stopper portion with the storage cylinder portion is the storage cylinder. A compass comprising a retaining portion for preventing the portion from slipping out from the portion to the side opposite to the needle. A second to-be-prevented portion different from the engaged portion and the to-be-extracted portion is formed on the knock member, and the knock member is brought into contact with the second to-be-extracted portion by contacting the storage cylinder portion. The compass according to claim 1, further comprising a second retaining portion for preventing the storage tube portion from slipping out from the side opposite to the needle. A window hole penetrating the peripheral wall portion of the storage cylinder portion is formed in the storage cylinder portion, and the engagement portion is configured by an edge portion on the opposite side of the needle of the window hole. An unlocking member is provided on one of the two legs of the rotating leg that is rotatably connected to the leg, and the center leg and the both legs of the rotating leg are in a state where the knock member is disposed at the protruding position. When closed, the engagement releasing member pushes the engaged portion disposed in the window hole to a position where the engagement with the engaging portion is released. The compass according to claim 1 or 2.

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