Tape holder for a tape measure

Abstract

A tape holder for a tape measure is provided, which includes a holder body, a clamp holder, a locking bracket, a bracket spring, a push button having a one-way rotation inducing groove, a push button spring, and a position maintaining pin, wherein a locking claw of the locking bracket is capable of easily switching between a locked state and an unlocked state when the push button moves up and down in response to an operation of the push button and an elastic force of the push button spring.

Description

Technical Field

[0001] This disclosure relates to a belt retainer for a measuring tape, and more specifically to a belt retainer for a measuring tape used to suspend the measuring tape while it is attached to a belt. Background Technology

[0002] Measuring tapes are widely used tools on construction sites because they allow users to easily measure lengths and are easy to carry.

[0003] Because measuring tapes are frequently used in construction, they are typically carried by hanging them on a strap. To facilitate carrying measuring tapes in this way, they are equipped with strap clips.

[0004] A typical tape retainer for measuring tapes is a combination of a retainer body and a retaining part. The retaining part has a through-hole formed vertically through which the tape holder of the measuring tape passes to suspend the tape. Using such a typical tape retainer for measuring tapes, workers can freely use both hands by placing the tape holder of the measuring tape on the retaining part and securing the measuring tape, and can conveniently use the measuring tape by removing it from the retaining part when needed.

[0005] However, when a tape measure is installed in this way using a typical tape measure retainer, the tape measure can easily detach from the retainer when the worker moves his or her body violently, which is problematic.

[0006] Therefore, there is a need for a tape retainer for measuring tapes that locks the measuring tape to the tape retainer in a locked state after it is attached, so that the measuring tape will not come off, and allows the measuring tape to be unlocked and detached from the tape retainer only when needed.

[0007] Meanwhile, as an example of related technology, U.S. Patent No. 11,517,103 has been filed, and the aforementioned related technology is incorporated herein by reference. Summary of the Invention

[0008] Technical issues

[0009] This disclosure is made in view of the aforementioned problems in the related art, and is intended to provide a retainer for a measuring tape with a novel structure, wherein the locking claw of the locking bracket can be easily switched between a locked state and an unlocked state by operating a push button.

[0010] Technical solution

[0011] To achieve the above objectives, according to one aspect of this disclosure, a tape retainer for a measuring tape is provided. The tape retainer includes: a retainer body, wherein a clamping member retaining portion is attached to the front of the retainer body such that a clamping member through-hole is formed in a vertical direction, through which the tape clamping member of the measuring tape passes; a locking bracket, the locking bracket including: a locking pawl disposed on the lower side of the locking bracket to prevent the tape clamping member of the measuring tape from disengaging from the clamping member through-hole; a rotating shaft disposed on the upper side of the locking bracket, thereby rotatably connected to the retainer body; and a rotational force input portion. A locking pawl is located inside the locking bracket. When a rotational force is input to the rotational force input portion, the locking pawl can rotate around the rotational axis to move from a position that does not obstruct the disengagement of the belt clamp to a position that obstructs the disengagement of the belt clamp. A bracket spring is located in the retainer body to elastically support the locking bracket in one direction, such that the locking pawl of the locking bracket is located in a position that does not obstruct the disengagement of the belt clamp. A push button has a push input portion at its top and a one-way rotational induction groove in the form of a closed curve is provided in the center of the push button in the vertical direction. The push button is located within the retainer body. The body guide reciprocates vertically to apply a rotational force to the rotational force input portion of the locking bracket by moving downward, and to not apply a rotational force to the rotational force input portion of the locking bracket by moving upward; a push button spring is disposed in the retainer body to elastically support the push button in the upward direction; and a position holding pin includes: an upper / lower extension portion extending vertically; a first connecting end portion bending horizontally at the bottom of the upper / lower extension portion and inserting into and connecting to a pin connecting hole in the retainer body; The second connecting end is bent horizontally at the top of the upper / lower extension and inserted into the unidirectional rotation guiding groove of the push button. The unidirectional rotation guiding groove may include: a first sitting portion for the second connecting end to sit on; and a second sitting portion disposed at a higher position than the first sitting portion and for the second connecting end to sit on. The second connecting end of the position holding pin can sit on the first sitting portion or the second sitting portion when the push button moves up and down, while rotating in one direction along the unidirectional rotation guiding groove.

[0012] The unidirectional rotation guiding groove may further include: a first motion limiting portion, which is disposed on a first side portion in the width direction at a position higher than the second seating portion to limit the upper movement range of the second connecting end; and a second motion limiting portion, which is disposed on a second side portion in the width direction at a position higher than the second seating portion to limit the upper movement range of the second connecting end, wherein, due to the downward movement of the push button, the second connecting end located at the first seating portion can move to the first motion limiting portion; due to the upward movement of the push button, the second connecting end located at the first motion limiting portion can move to the second seating portion; due to the downward movement of the push button, the second connecting end located at the second seating portion can move to the second motion limiting portion; and due to the upward movement of the push button, the second connecting end located at the second motion limiting portion can move to the first seating portion, so that the second connecting end can rotate in one direction along the unidirectional rotation guiding groove.

[0013] A unidirectional rotation-inducing groove can be formed between an inner guide wall extending in a closed curve and an outer guide wall extending in a closed curve and arranged to surround the inner guide wall. The inner guide wall may include: a first inner guide surface that guides the second connecting end along a first width direction when the second connecting end located in the first seating portion moves to the first motion-limiting portion; and a second inner guide surface that guides the second connecting end along a second width direction when the second connecting end located in the first motion-limiting portion moves to the second seating portion, and the second seating portion is connected to the lower portion of the second inner guide surface. The outer guide wall may include: a first outer guide surface. When the second connecting end moves to the first motion limiting portion after passing the first inner guide surface, the first outer guide surface guides the second connecting end along the second width direction; when the second connecting end located in the second sitting portion moves to the second motion limiting portion, the second outer guide surface guides the second connecting end along the second width direction, and the second motion limiting portion is connected to the upper portion of the second outer guide surface; and when the second connecting end located in the second motion limiting portion moves to the first sitting portion, the third outer guide surface guides the second connecting end along the first width direction, and the first sitting portion is connected to the lower portion of the third outer guide surface.

[0014] Beneficial effects

[0015] According to this disclosure, the locking claw of the locking bracket can be easily switched between a locked state and an unlocked state by operating the push button. Attached Figure Description

[0016] Figure 1This is a perspective view of a measuring tape with a retainer in an unlocked state, according to an embodiment of the present disclosure, viewed from the front.

[0017] Figure 2 It was observed from the rear. Figure 1 A three-dimensional image;

[0018] Figure 3 It shows that they have been separated. Figure 1 Exploded 3D view of the components;

[0019] Figure 4 It shows that they have been separated. Figure 3 Exploded perspective view of the main components;

[0020] Figure 5 It was observed from the rear. Figure 4 A three-dimensional image;

[0021] Figure 6 and Figure 7 yes Figure 4 A perspective view of the locking bracket shown;

[0022] Figure 8 and Figure 9 yes Figure 4 A perspective view of the push button shown;

[0023] Figure 10 It is a three-dimensional view of the locking bracket and locking bracket spring connected to the front body;

[0024] Figure 11 It is separately connected with a push button and a position holding pin. Figure 10 A three-dimensional image;

[0025] Figure 12 It is a 3D view of the push button connected to the rear body;

[0026] Figure 13 It is separately connected with a locking bracket. Figure 12 A three-dimensional image;

[0027] Figure 14 yes Figure 1 The front view shows the clamp holding part with hidden lines;

[0028] Figure 15 It is in a locked state. Figure 1 A perspective view of a measuring tape with a retainer;

[0029] Figure 16 It is along Figure 14 A cross-sectional view of line AA;

[0030] Figure 17 It shows Figure 16A cross-sectional view showing the relationship between the push button, locking bracket, and position holding pin.

[0031] Figure 18 yes Figure 17 Side view;

[0032] Figure 19 This is when the retainer used for the measuring tape is switched to the locked state. Figure 16 Corresponding views;

[0033] Figure 20 It is shown Figure 19 A cross-sectional view showing the relationship between the push button, locking bracket, and position holding pin.

[0034] Figure 21 yes Figure 20 Side view;

[0035] Figure 22 This is a rear view of the front body, which includes a locking bracket, a locking bracket spring, a push button, and a position holding pin; and

[0036] Figures 23 to 27 This is a conceptual diagram showing the state in which the second connecting end of the position holding pin is located in a unidirectional rotation induction groove as the push button moves up and down. Detailed Implementation

[0037] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, enabling those skilled in the art to readily practice the disclosure. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. Furthermore, for clarity of explanation, components unrelated to the description have been omitted from the drawings, and similar components are given similar reference numerals throughout the specification.

[0038] Throughout the instruction manual, when it is said that a part "includes" a component, unless there is an explicit statement to the contrary, this does not mean that other components are excluded, but rather that other components are included.

[0039] The tape retainer for measuring tapes according to embodiments of the present disclosure is designed to hold a conventional measuring tape equipped with a tape clamp.

[0040] The present disclosure of a retainer for a measuring tape includes a retainer body 100, a locking bracket 200, a bracket spring 300, a push button 400, a push button spring 500, and a position holding pin 600.

[0041] The belt coupling portion 110 for mounting on the belt is provided on the rear of the retainer body 100 (see [reference]). Figure 2 and Figure 3The connecting part 110 can be changed and used in many different forms.

[0042] The clamping member holding portion 120 is connected to the front portion of the retainer body 100, and the clamping member through hole 121 is formed in the vertical direction between the retainer body 100 and the clamping member holding portion 120 (see [reference]). Figure 1 and Figure 16 ).

[0043] The clamping part 120 is manufactured separately from the retainer body 100 and is connected to the retainer body 100 by bolts.

[0044] When the measuring tape with clamping member is inserted vertically downward from the top of the clamping member through hole 121, the measuring tape is mounted on the retainer body 100.

[0045] A pair of elastic fasteners 130 in the form of leaf springs are provided on the front part of the retainer body 100.

[0046] The pair of elastic fasteners 130 are located inside the clamping member through hole 121 and are used to retain and fix the clamping member inserted into the clamping member through hole 121 on both sides of the clamping member in the left-right direction (see...). Figure 14 ).

[0047] For the description of the above-mentioned connecting portion 110, clamping member holding portion 120, elastic fastener 130, etc., please refer to U.S. Patent No. 11,517,103, which is incorporated herein by reference, and detailed description thereof is omitted.

[0048] The retainer body 100 has a structure in which a front body 101 and a rear body 102 are assembled together to form an empty space inside the retainer body 100 (see [link]). Figure 4 and Figure 5 ).

[0049] The locking bracket 200 is connected to the front body 101, and a pair of openings 101a are formed in the front body 101 for the locking bracket 200 to pass through.

[0050] At the rear of the front body 101, a shaft connection portion 101b is formed to engage with the rotation shaft 220 of the locking bracket 200, which will be described later.

[0051] The rear body 102 is provided with a pin connection hole 102a, through which the first connecting end 611 of the pin 600, which is held in the position described later, passes for connection.

[0052] A spring support claw 102b is formed on the front part of the rear body 102 to support the lower end of the push button spring 500.

[0053] On the upper part of the rear body 102, a push button protection wall 102c is provided, which protrudes upward to prevent the push button 400, which will be described later, from being accidentally pressed.

[0054] A push button opening 103 is formed on the upper surface of the holder body 100 to guide the vertical movement of the push button 400.

[0055] The push button opening 103 is formed by combining the front body 101 and the rear body 102, and is located in front of the push button protective wall 102c.

[0056] The locking bracket 200 includes a locking claw 210, a rotating shaft 220, a rotational force input part 230, and a first spring connecting part 240.

[0057] Locking claws 210 are provided on the lower side of the locking bracket 200 to prevent the tape measure's clamping member from leaving the clamping member through hole 121. In this embodiment, two locking claws 210 are provided.

[0058] The rotating shaft 220 is disposed on the upper side of the locking bracket 200 and is rotatably connected to the shaft connection portion 101b of the retainer body 100.

[0059] The rotational force input part 230 is a component located inside the locking bracket 200 and is a component that receives rotational force from the push button 400, which will be described later.

[0060] The first spring connecting part 240 is a component for connecting to the bracket spring 300, which will be described later.

[0061] When the push button 400 applies a rotational force to the rotational force input portion 230 of the locking bracket 200, the locking pawl 210 can rotate around the rotation axis 220 to move to a position that prevents the belt clamp from disengaging.

[0062] One end of the support spring 300 is connected to the retainer body 100, and the other end is connected to the first spring connection portion 240 of the locking bracket 200 to elastically support the locking bracket 200 in one direction, such that the locking claw 210 of the locking bracket 200 is in a position that does not prevent the belt clamp from disengaging.

[0063] Therefore, when there is no external force, due to the bracket spring 300, the locking claw 210 of the locking bracket 200 is in a position that does not prevent the belt clamp from disengaging. When the push button 400 applies a rotational force to the rotational force input portion 230 of the locking bracket 200, the locking claw 210 moves to a position that prevents the belt clamp from disengaging.

[0064] As described above, the locking claw 210 of the locking bracket 200 can switch between a locked state and an unlocked state.

[0065] In this case, the locked state is when the locking claw 210 of the locking bracket 200 has moved to a position that prevents the tape holder from disengaging, and in this state, the tape measure inserted into the tape holder through hole 121 cannot be separated from the tape retainer.

[0066] On the other hand, the unlocked state is when the locking claw 210 of the locking bracket 200 has moved to a position that does not obstruct the disengagement of the tape clamp, and in this state, the tape clamp of the measuring tape can be inserted into the clamp through hole 121 to install the measuring tape to the tape retainer, or the tape clamp of the measuring tape inserted into the clamp through hole 121 can be separated from the tape retainer.

[0067] Figures 1 to 5 , Figure 14 as well as Figures 16 to 18 It is displayed based on the unlock status.

[0068] Figure 15 , Figures 19 to 21 This is based on the locked state.

[0069] Push button 400 is configured to apply or not apply rotational force to locking bracket 200.

[0070] The push button 400 is guided by the retainer body 100 to reciprocate in the vertical direction and is arranged to pass through the push button opening 103 of the retainer body 100.

[0071] By moving downwards, the push button 400 applies a rotational force to the rotational force input portion 230 of the locking bracket 200, and by moving upwards, the push button 400 no longer applies a rotational force to the rotational force input portion 230 of the locking bracket 200.

[0072] The push button 400 has a push input portion 410 located at the top, a one-way rotation guide groove 420 formed in the center in the vertical direction, and a second spring connecting portion 430 formed at the bottom.

[0073] The push input section 410 is a component that receives push operations from the user. That is, the user applies pressure to the push input section 410.

[0074] The unidirectional rotation-guiding groove 420 is a closed-curve groove and is a component into which the second connecting end 612 of the position-holding pin 600, which will be described later, is inserted so as to guide the second connecting end 612 of the position-holding pin 600 to rotate in one direction according to the up-and-down movement of the push button 400. The unidirectional rotation-guiding groove 420 will be described later.

[0075] The second spring connecting part 430 is a component for connecting to the push button spring 500, which will be described later.

[0076] The lower end of the push button spring 500 is supported by the spring support claw 102b of the retainer body 100 to elastically support the push button 400 in the upward direction.

[0077] The position holding pin 600 includes: an upper / lower extension 610 that extends vertically; a first connecting end 611 that bends horizontally at the bottom of the upper / lower extension 610 and is inserted into and connected to the pin connecting hole 102a of the retainer body 100; and a second connecting end 612 that bends horizontally at the top of the upper / lower extension 610 and is inserted into the unidirectional rotation guiding groove 420 of the push button 400.

[0078] Reference Figure 9 The unidirectional rotation-inducing groove 420 will be described in detail.

[0079] A unidirectional rotational induction groove 420 is formed between an inner guide wall 421 and an outer guide wall 422 that face each other and are spaced apart.

[0080] Both the inner guide wall 421 and the outer guide wall 422 extend in the form of closed curves, and the outer guide wall 422 is arranged to surround the inner guide wall 421.

[0081] The inner guide wall 421 includes a second seating portion 421a, a first inner guide surface 421b, and a second inner guide surface 421c.

[0082] The outer guide wall 422 includes a first seating portion 422a, a first motion limiting portion 422b, a second motion limiting portion 422c, a first outer guide surface 422d, a second outer guide surface 422e, and a third outer guide surface 422f.

[0083] The second connecting end 612 of the position holding pin 600 can be seated on the first seat portion 422a or the second seat portion 421a.

[0084] At this time, the second seating portion 421a is formed at a position higher than the first seating portion 422a.

[0085] In other words, due to the up-and-down movement of the push button 400, the second connecting end 612 of the position holding pin 600 rotates in one direction along the unidirectional rotation induction groove 420 and can sit on the first sitting portion 422a or the second sitting portion 421a.

[0086] The states in which the second connecting end 612 of the position holding pin 600 is seated on the first seating portion 422a and the states in which the second connecting end 612 of the position holding pin 600 is seated on the second seating portion 421a will be described respectively.

[0087] When the second connecting end 612 of the position holding pin 600 is seated on the first seated portion 422a of the outer guide wall 422, the upper end of the push button 400 is held at the upper position La, and in this case, the locking claw 210 of the locking bracket 200 is positioned in a position that does not obstruct the disengagement of the belt clamp and is in the unlocked state.

[0088] like Figures 16 to 18 As shown, the push button 400 moves upward and does not apply rotational force to the rotational force input portion 230 of the locking bracket 200, and due to the bracket spring 300, the locking claw 210 of the locking bracket 200 is positioned in a position that does not prevent the clamp from disengaging.

[0089] Therefore, the locking bracket 200 is in contact with... Figure 1 The same state in the middle.

[0090] On the other hand, when the second connecting end 612 of the position holding pin 600 is seated on the second seated portion 421a of the inner guide wall 421, the upper end of the push button 400 is maintained at the lower position Lb, and in this case, the locking claw 210 of the locking bracket 200 is positioned at a position that prevents the belt clamp from disengaging and is in a locked state.

[0091] like Figures 19 to 21 As shown, the push button 400 moves downward and applies a rotational force to the rotational force input portion 230 of the locking bracket 200, thereby positioning the locking claw 210 of the locking bracket 200 at a position that prevents the belt clamp from disengaging.

[0092] Therefore, the locking bracket 200 is in contact with... Figure 15 The same state in the middle.

[0093] Next, the unidirectional rotation induction effect of the unidirectional rotation induction groove 420 will be explained.

[0094] The first motion limiting portion 422b and the second motion limiting portion 422c are respectively formed on opposite sides of the outer guide wall 422 in the width direction.

[0095] The first motion limiting portion 422b is formed on one side in the width direction at a position higher than the second seating portion 421a to limit the upward movement range of the second connecting end 612.

[0096] The second motion limiting portion 422c is formed on the other side in the width direction at a position higher than the second seating portion 421a to limit the upward movement range of the second connecting end 612.

[0097] In this structure, the push button 400 moves downward by the user's operation, and when there is no external force, the push button 400 moves upward by the elastic force of the push button spring 500.

[0098] like Figure 23 As shown, when the push button 400 is in the upper position La and the second connecting end 612 is seated on the first seat portion 422a, when the push button 400 is moved downward by the user's operation, as... Figure 24 As shown, the second connecting end 612 moves from the first seating portion 422a to the first motion limiting portion 422b.

[0099] At this time, from Figure 23 The state transition shown is to Figure 24 During the state shown, the first inner guide surface 421b and the first outer guide surface 422d are used.

[0100] When the second connecting end 612 located in the first seating portion 422a moves to the first motion limiting portion 422b, the first inner guide surface 421b guides the second connecting end 612 along a width direction. That is, the first inner guide surface 421b is shaped to extend to one side in the width direction while pointing upward.

[0101] When the second connecting end 612 moves to the first motion limiting portion 422b after passing the first inner guide surface 421b, the first outer guide surface 422d guides the second connecting end 612 along another width direction, and the first motion limiting portion 422b is connected to its upper portion. That is, the first outer guide surface 422d is shaped to extend inward in the width direction while pointing upward.

[0102] In the above state, when the force applied to the push button 400 is removed, the push button 400 moves upward due to the elastic force of the push button spring 500, and as... Figure 25 As shown, the second connecting end 612 moves from the first motion limiting portion 422b to the second seating portion 421a.

[0103] At this time, from Figure 24 The state transition shown is to Figure 25 During the state shown, the second inner guide surface 421c is used.

[0104] When the second connecting end 612 located in the first motion limiting portion 422b moves to the second seating portion 421a, the second inner guide surface 421c guides the second connecting end 612 in another width direction, and the second seating portion 421a is connected to its lower portion. That is, the second inner guide surface 421c is shaped to extend to the other side in the width direction while pointing downward.

[0105] As a result, the push button 400 is located at the lower position Lb, and the second connecting end 612 sits on the second sitting portion 421a.

[0106] With the push button 400 in the lower position La and the second connecting end 612 resting on the second sitting portion 421a, when the push button 400 is moved downward by the user's operation, as... Figure 26 As shown, the second connecting end 612 moves from the second seating portion 421a to the second motion limiting portion 422c.

[0107] At this time, from Figure 25 The state transition shown is to Figure 26 During the state shown, the second outer guide surface 422e is used.

[0108] When the second connecting end 612 located in the second seating portion 421a moves to the second motion limiting portion 422c, the second outer guide surface 422e guides the second connecting end 612 along another width direction, and the second motion limiting portion 422c is connected to its upper portion. That is, the second outer guide surface 422e is shaped to extend to the other side in the width direction while pointing upward.

[0109] In the above state, when the force applied to the push button 400 is removed, the push button 400 moves upward due to the elastic force of the push button spring 500, and as... Figure 27 As shown, the second connecting end 612 moves from the second motion limiting portion 422c to the first seating portion 422a.

[0110] At this time, from Figure 26 The state transition shown is to Figure 27 During the state shown, the third outer guide surface 422f is used.

[0111] When the second connecting end 612 located in the second motion limiting portion 422c moves to the first seating portion 422a, the third outer guide surface 422f guides the second connecting end 612 along a width direction, and the first seating portion 422a is connected to its lower portion. That is, the third outer guide surface 422f is shaped to extend to one side in the width direction while pointing downward.

[0112] As a result, the push button 400 is once again located at the upper position La, and the second connecting end 612 sits on the first sitting portion 422a.

[0113] By repeatedly pushing the button 400 as described above, the locking claw 210 of the locking bracket 200 is alternately positioned in a position that does not obstruct the disengagement of the belt clamp and in a position that obstructs the disengagement of the belt clamp.

[0114] The above description of this disclosure is for illustrative purposes only, and those skilled in the art will understand that this disclosure can be readily modified into another specific form without altering its technical concept or essential features. Therefore, the above embodiments should be understood in all respects as illustrative and not restrictive. For example, any component described as a single part may be implemented separately, and similarly, components described as separate may be implemented in combination.

[0115] The scope of this disclosure is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims of this application and all modifications or alterations derived from their equivalent concepts shall be construed as being included within the scope of this disclosure.

[0116] Industrial applicability

[0117] This disclosure can be used as a belt retainer for a measuring tape to suspend the measuring tape while it is attached to a belt.

Claims

1. A tape retainer for a measuring tape, the tape retainer comprising: A retainer body, wherein a clamping member retaining part is attached to the front of the retainer body, such that a clamping member through hole is formed in the vertical direction, and the clamping member of the measuring tape passes through the clamping member through hole. A locking bracket includes: a locking claw disposed on the lower side of the locking bracket to prevent the tape clamp from disengaging from the clamp through-hole; a rotating shaft disposed on the upper side of the locking bracket for rotatable connection to the retainer body; and a rotational force input portion disposed on the inner side of the locking bracket, wherein when a rotational force is input to the rotational force input portion, the locking claw can rotate around the rotating shaft to move from a position that does not prevent the tape clamp from disengaging to a position that prevents the tape clamp from disengaging. A bracket spring, disposed in the retainer body, elastically supports the locking bracket in one direction such that the locking claw of the locking bracket is in a position that does not prevent the retainer from disengaging; A push button has a push input portion at its top and a one-way rotational induction groove in the form of a closed curve is provided in the center of the push button in the vertical direction. The push button is guided by the retainer body to reciprocate in the vertical direction so as to apply a rotational force to the rotational force input portion of the locking bracket by moving downward, and to not apply a rotational force to the rotational force input portion of the locking bracket by moving upward. A push button spring, disposed in the retainer body, for elastically supporting the push button in the upward direction; and A position holding pin, comprising: an upper / lower extension portion extending in the vertical direction; a first connecting end portion bent horizontally at the bottom of the upper / lower extension portion and inserted into and connected to a pin connecting hole in the retainer body; and a second connecting end portion bent horizontally at the top of the upper / lower extension portion and inserted into the unidirectional rotation guiding groove of the push button. The unidirectional rotation guiding groove includes: a first seating portion for the second connecting end to be seated; and a second seating portion disposed at a higher position than the first seating portion and for the second connecting end to be seated, wherein, according to the up-and-down movement of the push button, the second connecting end of the position holding pin can be seated on the first seating portion or the second seating portion while rotating along the unidirectional rotation guiding groove in one direction.

2. The retainer according to claim 1, wherein, The unidirectional rotation-inducing groove further includes: a first motion-limiting portion, which is disposed on a first side portion in the width direction at a position higher than the second sitting portion to limit the upper movement range of the second connecting end; and a second motion-limiting portion, which is disposed on a second side portion in the width direction at a position higher than the second sitting portion to limit the upper movement range of the second connecting end. Specifically, due to the downward movement of the push button, the second connecting end located at the first seat portion moves to the first motion limiting portion; due to the upward movement of the push button, the second connecting end located at the first motion limiting portion moves to the second seat portion; due to the downward movement of the push button, the second connecting end located at the second seat portion moves to the second motion limiting portion; and due to the upward movement of the push button, the second connecting end located at the second motion limiting portion moves to the first seat portion, thereby enabling the second connecting end to rotate in one direction along the unidirectional rotation induction groove.

3. The retainer according to claim 2, wherein, The unidirectional rotation-inducing groove is formed between an inner guide wall extending in a closed curve and an outer guide wall extending in a closed curve and arranged to surround the inner guide wall. The inner guide wall includes: A first inner guide surface guides the second connecting end along a first width direction when the second connecting end located in the first seating portion moves to the first motion limiting portion; and The second inner guide surface guides the second connecting end along the second width direction when the second connecting end located in the first motion limiting portion moves to the second sitting portion, and the second sitting portion is connected to the lower portion of the second inner guide surface. The outer guide wall includes: When the second connecting end moves to the first motion limiting portion after passing the first inner guiding surface, the first outer guiding surface guides the second connecting end along the second width direction. The second outer guide surface guides the second connecting end along the second width direction when the second connecting end located in the second seating portion moves to the second motion limiting portion, and the second motion limiting portion is connected to the upper portion of the second outer guide surface; and When the second connecting end located in the second motion limiting portion moves to the first seating portion, the third outer guiding surface guides the second connecting end along the first width direction, and the first seating portion is connected to the lower portion of the third outer guiding surface.

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