Rotary article support

Abstract

The invention discloses a rotary type article support which comprises a supporting part, a rotating part rotatably arranged on the supporting part, a locking part used for allowing and limiting rotation of the rotating part, and a product connecting part which rotates integrally with the rotating part and is used for fixing an article. The locking part comprises a first meshing part arranged on the supporting part, a second meshing part arranged on the rotating part and an elastic part; when the elastic part is in a natural state, the first meshing part and the second meshing part are meshed to limit rotation of the rotating part and the product connecting part; when pressure is applied to the rotating part to enable the elastic part to be compressed, the first meshing part and the second meshing part are separated, and the rotating part and the product connecting part can rotate freely. When the pressing force of the rotating part is relieved, the first meshing part and the second meshing part are meshed again.

Description

Technical Field

[0001] The invention relates to a rotating article support, which is suitable for supporting various products. Background Art

[0002] In industry, daily life, and other fields, many objects need to be fixed in a specific position when in use. For example, in order to achieve lighting in a specific location or area, the position of the light source must be firmly fixed. However, some objects also need to be rotated after installation to change their position or direction.

[0003] The existing Korean registered patent No. 10-1933018 discloses a movable lighting bracket, and the document proposes the mobility of the bracket itself. However, the prior art documents do not propose a solution that allows the supported objects to rotate. If some supported objects can be rotated, they will be able to better meet practical needs. For example, if the lighting equipment can be rotated, it can achieve the light source to illuminate different positions. In order to solve the problem of the flexibility of use of the supported objects, the present invention proposes a rotating object bracket.

[0004] Patent Document 1: Korean Registered Patent No. 10-1933018 Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a rotating article support that can realize the rotation of the supported article.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions: The present invention provides a rotating article support, comprising a supporting part, a rotating part that can rotate on the supporting part, a locking part for allowing and limiting the rotation of the rotating part, and a product connecting part that rotates integrally with the rotating part and is used to fix the article; the locking part comprises a first toothed part arranged on the supporting part, a second toothed part arranged on the rotating part, and an elastic part that enables the rotating part to move relative to the supporting part; when the elastic part is in a natural state, the first and second toothed parts are meshed with each other to limit the rotation of the rotating part and the product connecting part; when pressure is applied to the rotating part to compress the elastic part, the first and second toothed parts are separated, and the rotating part and the product connecting part can rotate freely; when the pressing force of the rotating part is released, the first and second toothed parts are re-engaged.

[0007] In one design, the support portion includes a support body, the support body is provided with a "convex"-shaped through hole penetrating the support body from top to bottom, the "convex"-shaped through hole is composed of two cylindrical first and second through holes with different diameters connected coaxially, and a first toothing portion is provided on a step surface in the "convex"-shaped through hole, and the first toothing portion is an annular sawtooth structure protruding downward along the step surface of the "convex"-shaped through hole; The rotating part is a "convex" shaped cylindrical structure, which is composed of a cylindrical rotating body and a bearing sleeve located at the lower part of the rotating body and protruding along the circumferential surface of the rotating body. A second toothing portion is provided on the upper end surface of the bearing sleeve, and the second toothing portion is an annular sawtooth structure protruding upward along the upper end surface of the bearing sleeve; an annular slot coaxial with the bearing sleeve and the rotating body is also provided between the bearing sleeve and the rotating body; The locking part also includes a support cover fixed at the bottom of the support body, the rotating part is inserted into the "convex" shaped through hole of the support body, wherein the upper part of the rotating body extends out of the support body and the product connecting part is fixed at the end; the lower end of the rotating part is spaced a certain distance from the support cover; the elastic part is partially accommodated in the annular slot of the rotating part and the lower end is combined with the support cover, and the rotating part can move up and down along the "convex" shaped through hole inside the support body, so that the first and second toothed parts are combined or disengaged, thereby limiting or allowing the rotation of the rotating part and the product connecting part.

[0008] Another design, the support part is composed of a support body, and a "mountain" shaped connecting part horizontally arranged on the support body; the "mountain" shaped connecting part includes a cylindrical rotating shaft cover with one end open, and a rotating shaft accommodating part extending along the axis direction of the rotating shaft cover; the rotating shaft accommodating part is a cylindrical part with one end open, and the open end has a "convex" shaped accommodating space extending from the port to the inside and having a small outside and a large inside, and the "convex" shaped accommodating space is composed of two cylindrical third and fourth through holes with different diameters connected coaxially, the diameter of the third through hole is smaller than the fourth through hole, and the first toothed part is provided inside; The rotating part is a "mountain"-shaped cylindrical structure, which is composed of a cylindrical rotating body with one end open and a rotating shaft extending along the axis direction of the rotating body; the open end of the rotating body is plugged into the open end of the rotating shaft cover, and one end of the rotating shaft has a second toothed portion, which can be inserted into the third or fourth through hole of the rotating shaft accommodating portion, and the second toothed portion is a spur gear structure, and the first toothed portion can be sleeved on the outer periphery thereof and mesh with each other; The elastic part is sleeved on the outer periphery of the rotating shaft and is limited between the rotating body and the open end of the rotating shaft accommodating part; the rotating shaft can move horizontally along the "convex"-shaped accommodating space to enable the first and second toothed parts to be engaged or disengaged, thereby limiting or allowing the rotation of the rotating part and the product connecting part.

[0009] The effects of the present invention are as follows: The rotating article support provided by the present invention can ensure the rotation of the article, thereby improving the use performance of the article.

[0010] In addition, the object can be rotated by a simple one-button press through the rotating part, which makes the use of the product more convenient.

[0011] At the same time, the locking portion of the present invention limits the rotation of the object through the toothed engagement of the first and second toothed portions, thereby preventing the object from rotating unexpectedly; and the toothed engagement of the locking portion can be released simply by releasing the pressing force applied to the rotating portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a rotating article support according to a first embodiment of the present invention; Figure 2 yes Figure 1 Exploded diagram of Figure 3 yes Figure 1 A front view of Figure 4 yes Figure 3 Sectional view in the 4-4' direction; Figure 5 yes Figure 4 An exploded view of the engagement relationship between the locking gear parts; Figure 6 yes Figure 4 A schematic diagram of the middle locking gear portion in a disengaged state; Figure 7 yes Figure 1 Schematic diagram of the rotation state of the connecting part of the product; Figure 8 is a schematic diagram of a rotating article support according to a second embodiment of the present invention; Fig. 9 yes Figure 8 Exploded diagram of Fig.10 yes Figure 8 A front view of Fig.11 yes Fig.10 A cross-sectional view taken along the line 11-11' is shown; Fig.12 yes Fig.11 The cross-sectional view along the direction 12-12' is shown; Fig.13 yes Fig.11 A schematic diagram of the middle locking gear portion in a disengaged state; Fig.14 yes Fig.10 Schematic diagram of the rotation state of the connecting part of the product; Reference numerals: 1000 The present invention's rotating article support 100 : Support 110: Support body 111 : Rotating shaft cover 112: Rotating shaft receiving portion 120: first through hole 130: second through hole 120': third through hole 130': fourth through hole 131: First tooth profile forming surface 200 : Rotating part 210 : Rotating body 211 : Support shaft 212 : Insert shaft 220 : Bearing sleeve 221: Second tooth profile forming surface 300 : Locking part 310: first toothing portion 320: second toothing portion 330 : Elastic part 340 : Support cover 400 : Product connection 410: Connection subject 420: Product fixing port. DETAILED DESCRIPTION

[0013] Before the specific description of the implementation of the present invention, the specific matters required for the implementation of the present invention are included in the embodiments and drawings described below. In addition, the same reference numerals mentioned in the specification refer to the same components. In order to facilitate the description of the structure of the product and the relative position relationship of the components, the description uses terms indicating the orientation, such as "upper", "lower", "left", "right", "inside", "outside", etc. The orientation terms are limited to indicating the relative position relationship of the components and do not limit the structure and usage orientation of the product. First embodiment

[0014] Figure 1 is a schematic diagram of a rotating article support according to a first embodiment of the present invention; Figure 2 yes Figure 1 Exploded diagram of Figure 3 yes Figure 1 A front view of Figure 4 yes Figure 3 The cross-sectional view in the 4-4' direction is shown. Figures 1 to 4 As shown, in the first embodiment of the present invention, a rotating article support 1000 includes a supporting portion 100 , a rotating portion 200 , a locking portion 300 and a product connecting portion 400 .

[0015] The product connection part 400 can rotate when it is connected to the support part 100 through the rotating part 200. In this way, the object (not shown) fixed on the product connection part 400 can be freely rotated to a suitable position through the product connection part 400 according to the purpose of use. Here, the object (not shown) can be a lighting device or other various objects.

[0016] The support portion 100 may be installed at a location where an object (not shown) is used.

[0017] The support part 100 includes a support body 110, and a "convex"-shaped through hole is provided inside the support body 110 in a vertical direction. The "convex"-shaped through hole is composed of two cylindrical first through holes 120 and second through holes 130 with different diameters and coaxially arranged, and the diameter of the second through hole 130 is larger than that of the first through hole 120. The stepped surface inside the "convex"-shaped through hole is a first tooth-shaped forming surface 131.

[0018] A stepped surface is formed between the first through hole 120 and the second through hole 130. That is, the first tooth-shaped surface 131 is located at the junction of the inner walls of the first and second through holes 120 and 130. The support body 110 can be assembled and disassembled at a position where an article (not shown) is used.

[0019] The rotating part 200 is a "convex"-shaped cylindrical structure, consisting of a cylindrical rotating body 210 and a bearing sleeve 220 located at the lower part of the rotating body and protruding outward along the circumference of the rotating body 210. The upper end surface of the bearing sleeve is a second tooth-forming surface 221. The bearing sleeve is flush with the lower end of the rotating body 210 and a ring-shaped slot with an open lower end is provided between the two.

[0020] The rotating body 210 is partially located inside the first and second through holes 120 and 130, the upper part of the rotating body 210 protrudes from the upper end surface of the support part 100, and the outer diameter of the rotating body 210 matches the inner diameter of the first through hole 120. Here, the rotating body 210 and the first and second through holes 120, 130 are coaxially arranged.

[0021] The outer diameter of the bearing sleeve 220 matches the inner diameter of the second through hole 130 .

[0022] See also Figures 5 to 7 ,in, Figure 5 yes Figure 4 Exploded view of the connection between the locking gear parts. Figure 6 yes Figure 4 Schematic diagram of the unlocked state of the middle lock gear part. Figure 7 yes Figure 1 Schematic diagram of the rotation state of the product connection part.

[0023] like Figures 5 to 7 As shown, the locking portion 300 includes a first toothed portion 310 , a second toothed portion ( 320 ), an elastic portion 330 and a support cover 340 , and the support cover 340 is fixed to the bottom of the support body 110 .

[0024] The first toothed portion 310 has a plurality of toothed structures protruding along the first toothed forming surface 131, and each tooth on the first toothed portion 310 is arranged parallel to the axis of the first through hole 120. That is, each tooth on the first toothed portion 310 protrudes downward from the bottom of the first through hole 120. The structure of the first toothed portion 310 is an annular sawtooth structure protruding downward along the stepped surface of the "convex"-shaped through hole.

[0025] The second toothing portion 320 has a plurality of tooth structures protruding along the upper end surface of the bearing sleeve, i.e., the second tooth-forming surface 221. Each tooth on the second toothing portion 320 is configured to be meshed with the tooth on the first toothing portion 310. The structure of the second toothing portion 320 is an annular sawtooth structure protruding upward along the upper end surface of the bearing sleeve.

[0026] When the first and second toothed parts 310 and 320 are meshed, the second toothed part 320 and the rotating part 200 integrated therewith are restricted from rotating. When the first and second toothed parts 310 and 320 are disengaged and released, the rotating part 200 is allowed to rotate.

[0027] An annular slot coaxial with the bearing sleeve and the rotating body is also provided between the bearing sleeve and the rotating body. The elastic part 330 is partially accommodated in the annular slot, and the lower end of the elastic part 330 is combined with a support cover 340 located below the rotating part 200 and spaced at a certain distance. The elastic part 330 can be compressed and released with the lifting and lowering of the rotating body 210. Here, the elastic part 330 can be a compression spring structure.

[0028] In addition, ideally, the elastic portion 330 can be installed in a compressed state. Therefore, the elastic restoring force of the elastic portion 330 will make the second toothed portion 320 mesh with the first toothed portion 310, thereby preventing the rotating portion 200 from rotating unexpectedly.

[0029] The product connection portion 400 includes a connection body 410 and a product fixing port 420 .

[0030] The connecting body 410 surrounds and is fixed to the upper end of the rotating body 210. The lower part of the rotating body 210 is located inside the supporting body 110. There is a certain distance between the connecting body 410 and the supporting body 110 to allow the rotating part to move up and down. In addition, a product fixing port 420 is provided on the connecting body 410 for fixing items not shown in the figure.

[0031] At this time, the axis of the product fixing port 420 is perpendicular to the axis of the rotating body 210. In addition, the axis of the product fixing port 420 and the axis of the rotating body 210 can be intersected at an angle less than 90 degrees. At the same time, the axis of the product fixing port 420 and the axis of the rotating part 200 can be coaxially arranged or parallel to each other.

[0032] refer to Figure 4 When no external force is applied to the product connecting portion 400, the first and second toothed portions 310 and 320 will maintain the combined state. At this time, the product connecting portion 400 and the rotating portion 200 cannot rotate.

[0033] like Figure 4 and Figure 6 As shown, when the product connecting part 400 applies pressure in the direction of the supporting body 110, the rotating part 200 will drop in the direction of the compression elastic part 330. At the same time, the second toothing part 320 is separated from the first toothing part 310, and the rotation restriction of the rotating part 200 by the locking part 300 is released, and the rotating part 200 and the product connecting part 400 will be able to rotate freely.

[0034] like Figure 6 and Figure 4 As shown, when the pressure applied to the product connecting part 400 and the rotating part 200 is released, the elastic restoring force of the elastic part 330 will cause the second toothing part 320 to be combined with the first toothing part 310, so that the rotation of the rotating part 200 and the product connecting part 400 will be restricted again.

[0035] The user can press the product connection part 400 toward the support part 100 and then rotate the product connection part 400 to a target position. When the pressure applied to the product connection part 400 is released, the product connection part 400 will maintain its rotated target position.

[0036] In addition, according to the tooth shape and size specifications of the first and second toothed parts 310 and 320, the minimum rotation distance of the rotating part 200 and the product connecting part 400 can be set.

[0037] Second embodiment Second embodiment Figures 8 to 14 .in, Figure 8 Schematic diagram of a rotating article support according to a second embodiment of the present invention. Fig. 9 yes Figure 8 Exploded diagram of . Fig.10 yes Figure 8 Front view of . Fig.11 yes Fig.10 The cross-sectional view along the 11-11' direction is shown.

[0038] like Figures 8 to 11 As shown, the rotating article support according to the second embodiment of the present invention includes a supporting portion 100 , a rotating portion 200 , a locking portion 300 and a product connecting portion 400 .

[0039] The support portion 100 is composed of a support body 110 and a "mountain" shaped connecting portion horizontally arranged on the support body; the "mountain" shaped connecting portion includes a cylindrical rotating shaft cover 111 with one end open and a rotating shaft accommodating portion 112 extending along the axial direction of the rotating shaft cover.

[0040] The rotating shaft accommodating portion 112 is a cylindrical member open at one end, and the open end has a "convex" shaped accommodating space extending from the port to the inside and being small on the outside and large on the inside. The "convex" shaped accommodating space is formed by two cylindrical third and fourth through holes 120' and 130' with different diameters connected coaxially and horizontally. The diameter of the third through hole 120' is smaller than that of the fourth through hole 130', and the third through hole 120' has a first toothing portion 310 inside.

[0041] The support body 110 is designed to be detachable at a position where an article (not shown) is used. The rotating shaft cover 111 is arranged to intersect with the axis of the support body 110 .

[0042] The rotating part 200 is a "mountain" shaped cylindrical structure, which is composed of a cylindrical rotating body 210 with one end open and a rotating shaft extending along the axis direction of the rotating body. The rotating body 210 is a cylindrical part with one end open, and the open end of the rotating body 210 is plugged into the open end of the rotating shaft cover 111; a rotating shaft is also provided in the center of the rotating body 210, and one end of the rotating shaft has a second toothing part 320, which can be inserted into the third or fourth through hole inside the rotating shaft accommodating part 112. The second toothing part 320 is a spur gear structure, and the first toothing part 310 can be sleeved on its periphery and mesh with each other. The second toothing part 320 can move horizontally along the "convex" shaped accommodating space, and the second toothing part 320 on the rotating shaft can be combined or disengaged with the first toothing part 310 in the "convex" shaped accommodating space.

[0043] Preferably, the open end portion of the rotating body 210 is inserted into the interior of the rotating shaft cover 111 , and the outer diameter of the rotating body 210 matches the inner diameter of the rotating shaft cover 111 .

[0044] The rotating shaft accommodating portion 112 protrudes outward from the open end of the rotating shaft cover, or the rotating shaft protrudes outward from the open end of the rotating body.

[0045] The rotating shaft is composed of a support shaft 211 and an insertion shaft 212. The support shaft 211 is a structure protruding from the inside of the rotating body 210, and the support shaft 211 is coaxially arranged with the rotating body 210. The insertion shaft 212 is coaxially extended from the end of the support shaft 211. The outer diameter of the insertion shaft 212 may be smaller than the outer diameter of the support shaft 211. The outer diameter of the insertion shaft 212 matches the inner diameter of the third through hole 120'.

[0046] In addition, at least a portion of the end of the insertion shaft 212 may be accommodated inside the third and fourth through holes (120', 130'). The insertion shaft 212 may move in a horizontal direction along the third and fourth through holes 120', 130'.

[0047] In addition, a separate fixing member 213 may be provided, and the fixing member 213 may be coaxially arranged with the rotating shaft cover 111, the rotating shaft receiving portion 112, and the rotating portion 200. The fixing member 213 may penetrate the rotating shaft cover 111, the rotating shaft receiving portion 112, and extend into the rotating shaft of the rotating portion 200.

[0048] refer to Figure 12 to Figure 14 ,in Fig.12 yes Fig.11 The cross-sectional view along the 12-12' direction is shown. Fig.13 yes Fig.11 Schematic diagram of the unlocked state of the middle lock gear part. Fig.14 yes Fig.10 Schematic diagram of the rotation state of the product connection part.

[0049] like Figure 12 to Figure 14 As shown, the locking portion 300 includes a first toothed portion 310 , a second toothed portion 320 and an elastic portion 330 .

[0050] The first toothed portion 310 is formed along the circumference of the inner wall surface of the third through hole 120 ′, and each tooth of the first toothed portion 310 protrudes along the diameter direction of the third through hole 120 ′.

[0051] The second toothed portion 320 is formed along the outer circumference of the insertion shaft 212. In addition, the second toothed portion 320 is meshed with the first toothed portion 310. At this time, when the first and second toothed portions 310, 320 mesh with each other, the rotation of the second toothed portion 320 and the integral rotating portion 200 is restricted.

[0052] The elastic part 330 is wrapped around the periphery of the rotating shaft and is limited between the rotating body and the open end of the rotating shaft receiving part, that is, both ends of the elastic part 330 are in contact with the end surfaces of the rotating body 210 and the rotating shaft receiving part 112 respectively.

[0053] The product connection part 400 includes a connection body 410 and a product fixing port 420. The connection body 410 is connected to the rotating part 200, and the axes of the connection body 410 and the rotating part 200 may be arranged to intersect. In addition, the product fixing port 420 is formed through the connection body and is opened at the end of the connection body 410. In addition, the product fixing port 420 can fix an unshown item.

[0054] refer to Fig.11 When the first and second toothed portions 310 and 320 are engaged, the rotation of the rotating portion 200 and the product connecting portion 400 will be restricted.

[0055] On the other hand, Fig.11 and Fig.13 As shown, when the product connection part 400 and the rotating part 200 move toward the rotating shaft cover 111, the combination of the first and second toothed parts 310 and 320 will be released, so the rotation interference caused by the toothed meshing will be released, and the rotating part 200 and the product connection part 400 will be able to rotate freely. At the same time, the movement of the product connection part 400 and the rotating part 200 will compress the elastic part 330, at this time, the second toothed part 320 will be accommodated in the fourth through hole 130', and the product connection part 400 can be rotated to a predetermined position.

[0056] Then, if Fig.13 and Fig.11 As shown, when the pressure applied to the product connecting part 400 and the rotating part 200 is released, the elastic restoring force of the elastic part 330 will re-engage the first and second toothed parts 310 and 320, thereby limiting the rotation of the rotating part 200 and the product connecting part 400. In this way, the product connecting part 400 will maintain its rotated state.

[0057] In both the first embodiment and the second embodiment of the present invention, the compression and elastic recovery effects of the elastic component are used to allow and restrict the rotation of the rotating part and the product connecting part.

[0058] As mentioned above, the main technical idea of ​​the present invention is to provide a rotating article holder. In addition, the embodiments disclosed in the present invention are only partial embodiments, and technicians in the field can make a variety of identical or equivalent technical means to replace the technical ideas of the present invention. The protection scope of the present invention should be determined according to the claims. The protection scope of the present invention is also applicable to the equivalent embodiments that may be derived. Any technical solution obtained by replacing the same or equivalent technical means shall fall within the scope of protection of the claims of the present invention.

Claims

1. Rotating article holder, characterized in that: It includes a supporting part, a rotating part that can rotate on the supporting part, a locking part for allowing and limiting the rotation of the rotating part, and a product connecting part that rotates integrally with the rotating part and is used to fix the article; the locking part includes a first toothing part arranged on the supporting part, a second toothing part arranged on the rotating part, and an elastic part that allows the rotating part to move relative to the supporting part; when the elastic part is in a natural state, the first and second toothing parts are meshed to limit the rotation of the rotating part and the product connecting part; when pressure is applied to the rotating part to compress the elastic part, the first and second toothing parts are separated, and the rotating part and the product connecting part can rotate freely; when the pressing force of the rotating part is released, the first and second toothing parts are re-engaged.

2. The rotating article support according to claim 1, characterized in that: The support portion comprises a support body, wherein a "convex"-shaped through hole is provided inside the support body and passes through the support body from top to bottom, the "convex"-shaped through hole is formed by coaxially connecting two cylindrical first and second through holes with different diameters, and a first toothing portion is provided on a stepped surface inside the "convex"-shaped through hole, and the first toothing portion is an annular sawtooth structure protruding downward along the stepped surface of the "convex"-shaped through hole; The rotating part is a "convex" shaped cylindrical structure, which is composed of a cylindrical rotating body and a bearing sleeve located at the lower part of the rotating body and protruding along the circumferential surface of the rotating body. A second toothing portion is provided on the upper end surface of the bearing sleeve, and the second toothing portion is an annular sawtooth structure protruding upward along the upper end surface of the bearing sleeve; an annular slot coaxial with the bearing sleeve and the rotating body is also provided between the bearing sleeve and the rotating body; The locking part also includes a support cover fixed at the bottom of the support body, the rotating part is inserted into the "convex" shaped through hole of the support body, wherein the upper part of the rotating body extends out of the support body, and the product connecting part is fixed at the end; the lower end of the rotating part is spaced a certain distance from the support cover; the elastic part is partially accommodated in the annular slot of the rotating part and the lower end is combined with the support cover, and the rotating part can move up and down along the "convex" shaped through hole inside the support body, so that the first and second toothed parts are combined or disengaged, thereby limiting or allowing the rotation of the rotating part and the product connecting part.

3. The rotating article support according to claim 1, characterized in that: The support part is composed of a support body and a "mountain" shaped connecting part horizontally arranged on the support body; the "mountain" shaped connecting part includes a cylindrical rotating shaft cover with one end open, and a rotating shaft accommodating part extending along the axis direction of the rotating shaft cover; the rotating shaft accommodating part is a cylindrical part with one end open, and the inside of the open end has a "convex" shaped accommodating space extending from the port to the inside and being small outside and large inside, and the "convex" shaped accommodating space is composed of two cylindrical third and fourth through holes with different diameters coaxially connected, the diameter of the third through hole is smaller than the fourth through hole, and the first toothed part is provided inside; The rotating part is a "mountain"-shaped cylindrical structure, which is composed of a cylindrical rotating body with one end open and a rotating shaft extending along the axis direction of the rotating body; the open end of the rotating body is plugged into the open end of the rotating shaft cover, and one end of the rotating shaft has a second toothed portion, which can be inserted into the third or fourth through hole of the rotating shaft accommodating portion, and the second toothed portion is a spur gear structure, and the first toothed portion can be sleeved on the periphery thereof and mesh with each other; The elastic part is sleeved on the outer periphery of the rotating shaft and is limited between the rotating body and the open end of the rotating shaft accommodating part; the rotating shaft can move horizontally along the "convex"-shaped accommodating space to make the first and second toothed parts engage or disengage, thereby limiting or allowing the rotation of the rotating part and the product connecting part.

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