Quick-release type support frame

Abstract

The utility model relates to a quick-release support frame, which is characterized in that a support rod is detachably combined with a connecting seat connected with a transportation element; the supporting rod is provided with a fixing part, and a positioning bolt of a quick release element is detachably inserted into the fixing part and the connecting seat to fix the fixing part and the connecting seat; when a plurality of clamps are arranged on the supporting rod to clamp a circuit board and the supporting rod moves along with the movement of the transportation element, the circuit board can be driven to pass through the baking equipment. Due to the fact that the supporting rod and the connecting base are fixed through the quick release element, the supporting rod can be detached or installed conveniently and quickly, and compared with threads of a screw lock, the positioning plug pin can resist corrosion of chemical agents and high temperature in the environment, and the structure is not prone to being damaged.

Description

Technical Field

[0001] The utility model relates to a support frame, and in particular to a quick-detachable support frame. Background Art

[0002] Existing support frames, such as the utility model patent case of "mobile circuit board hanging rack and circuit board baking equipment" in Taiwan, China, with certificate number M499026. Figure 6 and Figure 7 The support frame shown is a rod body that is screwed together with a locking plate of a conveying chain. The rod body is used to set a clamp that can be used to clamp the circuit board and convey it to the baking device.

[0003] Although the above-mentioned conventional support frame can be provided with a clamp for clamping the circuit board, since the rod body and the locking plate are connected by bolts and nuts, it is necessary to use tools and is relatively time-consuming to install or remove the rod body from the conveyor chain. Furthermore, in the environment of high temperature and chemical splashing when the circuit board is baked by the baking equipment, the thread of the screw is easily damaged by the high temperature or chemical erosion. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a support frame that can be quickly disassembled or installed, so that the support rod can be quickly connected to the transportation element for setting the clamp, and the quick-release element used in conjunction with the support rod has the effect of being less susceptible to corrosion than the screw lock structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a quick-release support frame, which is connected to a connecting seat on a transport element, and includes a support rod and a quick-release element, wherein the support rod has a fixing portion. The quick-release element includes a positioning pin and a head, wherein the head is connected to the positioning pin; the positioning pin is detachably inserted into the fixing portion and the connecting seat.

[0006] Preferably, the connecting seat of the utility model is a plate body and has a socket; the positioning pin includes a pin rod and a positioning block elastically combined with the pin rod, the pin rod passes through the fixing portion and is inserted into the socket, and the positioning block is buckled and fixed on the periphery of the socket.

[0007] Preferably, the connecting seat of the utility model has a top wall and a peripheral wall, the top wall has a plug hole, the peripheral wall has a side hole, one end of the side hole passes through the peripheral wall and the other end is communicated with the periphery of the plug hole; the positioning pin includes a pin rod and a positioning block elastically combined with the pin rod, the pin rod passes through the fixing portion and is inserted into the plug hole, and the positioning block is buckled into the side hole for fixing.

[0008] Preferably, the head of the utility model has a cover plate, the middle of the cover plate has a receiving groove and two side portions adjacent to the opposite sides of the receiving groove, the two side portions of the cover plate are respectively connected to an elastic hook; the fixing portion of the support rod is accommodated in the receiving groove, the two side portions are against the connecting seat, and the two elastic hooks are clamped and fixed on opposite sides of the connecting seat.

[0009] Preferably, the head of the utility model is a block and has a groove, wherein the groove has a deep groove portion with a deeper recessed depth and a shallow groove portion with a shallower recessed depth, and a shoulder is formed between the deep groove portion and the shallow groove portion; the fixing portion of the support rod is accommodated in the deep groove portion, and the connecting seat is accommodated in the shallow groove portion.

[0010] Preferably, the connecting seat of the utility model has an insertion hole; the fixing portion of the support rod has a through hole; the positioning pin of the quick-release element passes through the through hole of the fixing portion and is inserted into the insertion hole of the connecting seat.

[0011] Preferably, the through hole of the present invention is a round hole or a U-shaped hole.

[0012] Preferably, the head of the utility model has an inner surface, and the inner surface abuts against the surface of the fixing portion of the support rod; the positioning pin has a pin rod, and one end of the pin rod is welded to the inner surface.

[0013] Preferably, the head of the utility model has a screw hole; the positioning pin has a pin rod, one end of the pin rod forms a screw portion, and the screw portion is screwed and fixed in the screw hole.

[0014] Preferably, the transport element of the utility model is a chain plate, and the connecting seat extends outward from the edge of the transport element.

[0015] In order to achieve the above-mentioned purpose, the utility model provides a quick-detachable support frame, which is connected to a connecting seat on a transport element, and includes a support rod and a positioning pin, wherein the support rod has a fixing portion. The positioning pin is connected to the fixing portion, and the positioning pin is detachably inserted into the connecting seat, thereby detachably combining the support rod with the connecting seat.

[0016] Preferably, the connecting seat of the utility model has a socket; the positioning pin includes a pin rod and a positioning block elastically combined with the pin rod, the pin rod is inserted into the socket, and the positioning block is buckled and fixed on the periphery of the socket.

[0017] Preferably, the utility model connects two elastic hooks to opposite sides of the fixing portion respectively, and the two elastic hooks are clamped and fixed to opposite sides of the connecting seat.

[0018] The effect of the utility model is that, since the quick-release element is detachably connected to the connecting seat by the positioning pin passing through the fixing part of the support rod, the fixing part of the support rod is positioned between the head and the connecting seat, so as long as the quick-release element is inserted into the connecting seat, or pulled out from the connecting seat, the operation of installing the support rod on the connecting seat or removing it from the connecting seat can be completed, and the process is very fast and easy to perform. Furthermore, even if the surface of the positioning pin of the quick-release element is stained with medicine, it will not affect its positioning effect, so it is less likely to be damaged than the device of bolts and nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a stereogram of the first preferred embodiment of the utility model.

[0020] Figure 2 This is an exploded view of the first preferred embodiment of the utility model.

[0021] Figure 3 for Figure 1 Top view of the .

[0022] Figure 4 for Figure 3 F4-F4 cross-sectional view.

[0023] Figure 5 for Figure 3 F5-F5 cross-sectional view.

[0024] Figure 6 It is a cross-sectional view of the second preferred embodiment of the utility model.

[0025] Figure 7 It is a cross-sectional view of the third preferred embodiment of the utility model.

[0026] Figure 8 It is a cross-sectional view of the fourth preferred embodiment of the utility model.

[0027] Fig. 9 It is a three-dimensional diagram of the fifth preferred embodiment of the utility model.

[0028] Fig.10 This is an exploded view of the fifth preferred embodiment of the utility model.

[0029] Fig.11 for Fig. 9 Top view of the .

[0030] Fig.12 for Fig.11 F12-F12 cross-sectional view.

[0031] Fig.13for Fig.11 F13-F13 cross-sectional view.

[0032] Fig.14 It is a cross-sectional view of the sixth preferred embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 100: Quick-release support frame

[0035] 100A: Quick-release support bracket

[0036] 100B: Quick-release support bracket

[0037] 100C: Quick-release support bracket

[0038] 100D: Quick-release support frame

[0039] 100E: Quick-release support bracket

[0040] 10: Connecting seat

[0041] 10C: Connecting seat

[0042] 10D: Connecting seat

[0043] 10E: Connecting seat

[0044] 11C: Top wall

[0045] 12: Jack

[0046] 12C: Jack

[0047] 12D: Jack

[0048] 12E: Jack

[0049] 13C: Peripheral wall

[0050] 14C: Side hole

[0051] 20: Support rod

[0052] 20D: Support rod

[0053] 20E: Support rod

[0054] 22: Rod body

[0055] 22D: Rod body

[0056] 24: Fixed part

[0057] 24B: Fixed part

[0058] 24C: Fixed part

[0059] 24D: Fixed part

[0060] 24E: Fixed part

[0061] 241: Through hole

[0062] 241D: Through hole

[0063] 30: Quick release components

[0064] 30C: Quick release components

[0065] 30D: Quick release components

[0066] 32: Positioning pin

[0067] 32A: Positioning pin

[0068] 32B: Positioning pin

[0069] 32C: Positioning pin

[0070] 32D: Positioning pin

[0071] 32E: Positioning pin

[0072] 321: Latch rod

[0073] 321A: Latch lever

[0074] 321B: Latch lever

[0075] 321C: Latch lever

[0076] 321D: Latch lever

[0077] 321E: Latch lever

[0078] 322: Positioning block

[0079] 322C: Positioning block

[0080] 322D: Positioning block

[0081] 322E: Positioning block

[0082] 323A: Screw part

[0083] 34: Head

[0084] 34A: Head

[0085] 34B: Head

[0086] 34D: Head

[0087] 341: Groove

[0088] 341D: Cover

[0089] 342: Deep groove

[0090] 342A: Deep groove

[0091] 342B: Deep groove

[0092] 342D: Container

[0093] 343: Shallow groove

[0094] 343D: Side

[0095] 344: Shoulder

[0096] 344D: Elastic hook

[0097] 344E: Elastic hook

[0098] 345: Perforation

[0099] 345A: Screw hole

[0100] 346B: Inner surface

[0101] A: Transport components DETAILED DESCRIPTION

[0102] In order to more clearly illustrate the present invention, a preferred embodiment is given below with detailed description in conjunction with the accompanying drawings. Figures 1 to 5 As shown, the quick-release support frame 100 of the first preferred embodiment of the utility model is connected to a connecting seat 10 on a transport element A; in this preferred embodiment, the transport element A is one of the multiple chain pieces included in the conveyor chain, and in other preferred embodiments, the transport element A can also be a part of the conveyor belt body. The quick-release support frame 100 also includes a support rod 20 and a quick-release element 30, wherein:

[0103] The connecting seat 10 is a plate extending outward from the edge of the transport element A and has an insertion hole 12 .

[0104] The support rod 20 has a rod body 22, and the rod body 22 is a straight rod body. A fixing portion 24 is formed at the end of the rod body 22, and the fixing portion 24 has a through hole 241. In the present preferred embodiment, the fixing portion 24 is a plate formed at the end of the rod body 22, and the through hole 241 is a circular hole. In other preferred embodiments, the fixing portion 24 may also be connected to the circumference of the rod body 22 or not limited to the position of the end or circumference of the rod body 22. The through hole 241 may also be a U-shaped hole recessed from the outer edge of the fixing portion 24.

[0105] The quick release element 30 includes a positioning pin 32 and a head 34 connected to the positioning pin 32. The positioning pin 32 includes a pin rod 321 and a positioning block 322 elastically coupled to the periphery of the pin rod 321; in the preferred embodiment, the positioning block 322 is in the shape of a bead. The head 34 is a block and has a groove 341. The groove 341 is recessed inward from the surface of the head 34 on one side facing the positioning pin 32, and the groove 341 passes through the opposite sides of the circumference of the head 34. The groove 341 has a deep groove portion 342 with a deeper recess and a shallow groove portion 343 with a shallower recess, and a shoulder 344 is formed between the deep groove portion 342 and the shallow groove portion 343; a through hole 345 passes through the middle of the head 34, one end of the through hole 345 passes through the surface of the head 34 away from the positioning pin 32, and the other end leads to the middle of the deep groove portion 342; one end of the above-mentioned latch rod 321 passes through the through hole 345 and is welded to the through hole 345, thereby fixing the positioning pin 32 to the head 34.

[0106] When the quick release element 30 is used to position the support rod 20 on the connecting seat 10, the positioning pin 32 passes through the through hole 241 of the fixing portion 24 and is inserted into the insertion hole 12 of the connecting seat 10, so that the positioning block 322 is buckled and fixed on the periphery of the insertion hole 12. Therefore, the quick release element 30 is detachably combined with the connecting seat 10, the fixing portion 24 of the support rod 20 is accommodated in the deep groove portion 342 of the head portion 34, the inner surface of the deep groove portion 342 contacts the surface of the fixing portion 24, the connecting seat 10 is accommodated in the shallow groove portion 343, and the shoulder portion 344 is spaced from the surface of the connecting seat 10; in this way, the head portion 34 of the quick release element 30 is pressed against the surface of the fixing portion 24, and the fixing portion 24 of the support rod 20 is positioned between the head portion 34 and the connecting seat 10.

[0107] In other preferred embodiments, the head 34 described in the first preferred embodiment of the present invention may not be provided with the groove 341. When the positioning pin 32 passes through the fixing portion 24 and is inserted into the connecting seat 10 for fixing, the head 34 is directly pressed against the surface of the fixing portion 24, and the fixing portion 24 can also be positioned between the head 34 and the connecting seat 10. In addition, since the groove 341 provided on the head 34 of the quick-release element 30 is used to match the shape of the fixing portion 24 and the connecting seat 10, in other preferred embodiments, if the shape of the fixing portion 24 or the connecting seat 10 changes, the shape of the groove 341 can also change accordingly, so that the groove 341 can match and accommodate the fixing portion 24 and the connecting seat 10 after the shape changes.

[0108] The support rod 20 of the present invention can be used to set up a plurality of clamps for clamping circuit boards. Figure 2 As shown, when the support rod 20 of the utility model is positioned on the connecting seat 10 on the transport element A, the through hole 241 of the support rod 20 is firstly aligned with the insertion hole 12 of the connecting seat 10, and then the positioning pin 32 of the quick-release element 30 is passed through the through hole 241 of the support rod 20 and inserted into the insertion hole 12 of the connecting seat 10 for fixing, so that the support rod 20 can be positioned on the connecting seat 10. When the transport element A moves with the operation of the conveyor chain, the support rod 20 can be driven to move together through the connecting seat 10. When it is necessary to remove the support rod 20 from the connecting seat 10, the quick-release element 30 fixed to the connecting seat 10 can be pulled outward from the insertion hole 12 of the connecting seat 10, so that the support rod 20 can be removed from the connecting seat 10, and the operation of removing the support rod 20 is completed.

[0109] In addition to the first preferred embodiment described above, the pin rod 321 of the positioning pin 32 is inserted into and welded to the through hole 345 of the head 34. The positioning pin 32 and the head 34 can also be connected by means of screw locks. Figure 6 The second preferred embodiment of the utility model is shown, wherein the quick-release support frame 100A is substantially the same as the quick-release support frame described in the first preferred embodiment. The difference is that a screw hole 345A runs through the middle of the head 34A, one end of the screw hole 345A runs through the surface of the head 34A away from the positioning pin 32A, and the other end leads to the middle of the deep groove 342A; one end of the pin rod 321A forms a screw portion 323A, and the screw portion 323A is screwed and fixed in the screw hole 345A. Since the rest of the structure, function and use of the second preferred embodiment of the utility model are the same as the quick-release support frame described in the first preferred embodiment, they will not be repeated here.

[0110] In addition to the first preferred embodiment described above, in the present invention, the latch rod 321 of the positioning latch 32 is welded to the through hole 345 of the head 34. The latch rod 321 can also be welded to the surface of the head 34. Figure 7The third preferred embodiment of the utility model shown, wherein the quick-release support frame 100B is substantially the same as the quick-release support frame described in the first preferred embodiment. The difference is that the head 34B has an inner surface 346B on the inner side of the deep groove portion 342B, and the inner surface 346B is used to abut against the surface of the fixing portion 24B; one end of the latch rod 321B is welded to the inner surface 346B, so that the positioning latch 32B is connected to the head 34B. Since the rest of the structure, function and use of the third preferred embodiment of the utility model are the same as the quick-release support frame described in the first preferred embodiment, they will not be repeated here.

[0111] In addition to the first preferred embodiment of the present invention, the connecting seat 10 is a plate body and has the insertion hole 12. The connecting seat 10 can also be a block body for the quick release element 30 to be inserted and connected. Figure 8 The fourth preferred embodiment of the utility model is shown, wherein the quick-release support frame 100C is substantially the same as the quick-release support frame described in the first preferred embodiment. The difference is that the connecting seat 10C is a block and has a top wall 11C and a peripheral wall 13C adjacent to the periphery of the top wall 11C. The top wall 11C has an insertion hole 12C, and the peripheral wall 13C has a side hole 14C, one of the two ends of the side hole 14C in opposite directions passes through the peripheral wall 13C, and the other end is connected to the periphery of the insertion hole 12C. In this preferred embodiment, when the positioning pin 32C of the quick-release element 30C passes through the fixing portion 24C and is inserted into the insertion hole 12C with the pin rod 321C, the positioning block 322C abuts against the side hole 14C, so that the quick-release element 30C is fixed to the connecting seat 10C. Since the rest of the structure, function and usage of the fourth preferred embodiment of the utility model are the same as those of the quick-release support frame described in the first preferred embodiment, they will not be described in detail here.

[0112] In addition to the first preferred embodiment of the utility model, the head 34 of the quick-release element 30 is used to abut against the fixing portion 24. The head 34 can also be designed to have the function of clipping and fixing the connecting seat 10. Please refer to Figures 9 to 13 As shown, the fifth preferred embodiment of the utility model is a quick-release support frame 100D, which is connected to a connecting seat 10D on a chain transport element A. The quick-release support frame 100D also includes a support rod 20D and a quick-release element 30D, wherein:

[0113] The connecting seat 10D is a plate extending outward from the edge of the transport element A and has an insertion hole 12D.

[0114] The support rod 20D has a rod body 22D. The rod body 22D is a straight rod body and has a fixing portion 24D formed at an end thereof. The fixing portion 24D has a through hole 241D. The through hole 241D is a round hole.

[0115] The quick-release element 30D includes a positioning pin 32D and a head 34D connected to the positioning pin 32D. The positioning pin 32D includes a pin rod 321D and a positioning block 322D elastically combined with the peripheral side of the pin rod 321D; the head 34D has a cover plate 341D, the middle of the cover plate 341D has a receiving groove 342D, the part of the cover plate 341D adjacent to the opposite sides of the receiving groove 342D has two side parts 343D, and the two side parts 343D of the cover plate 341D are respectively connected to an elastic hook 344D; one end of the above-mentioned pin rod 321D is welded and fixed to the middle of the inner surface of the receiving groove 342D, so that the positioning pin 32D is fixedly connected to the head 34D.

[0116] When the quick-release element 30D is used to position the support rod 20D on the connecting seat 10D, the positioning pin 32D passes through the through hole 241D of the fixing portion 24D and is inserted into the insertion hole 12D of the connecting seat 10D, so that the positioning block 322D is buckled against the periphery of the insertion hole 12D and fixed. Therefore, the quick-release element 30D is detachably coupled to the connecting seat 10D, the fixing portion 24D of the support rod 20D is accommodated in the receiving groove 342D of the head portion 34D, the inner surface of the receiving groove 342D contacts the surface of the fixing portion 24D, and the two side portions 343D abut against the surface of the connecting seat 10D, and the two elastic hooks 344D on both sides of the head portion 34D are further clamped and fixed on opposite sides of the connecting seat 10D; in this way, the head portion 34D of the quick-release element 30D abuts against the surface of the fixing portion 24D, and the fixing portion 24D of the support rod 20D is positioned between the head portion 34D and the connecting seat 10D, and the design that the head portion 34D of the quick-release element 30D can be clamped on the connecting seat 10D enables the quick-release element 30D to be coupled to the connecting seat 10D in a more powerful manner.

[0117] In addition to the fifth preferred embodiment described above, the positioning pin 32D of the quick-release component 30D of the present invention is inserted into the through hole 241D of the fixing portion 24D and the insertion hole 12D of the connecting seat 10D in sequence. In other preferred embodiments, the position of the fixing portion 24D can be swapped with the connecting seat 10D; at this time, the positioning pin 32D of the quick-release component 30D will first pass through the insertion hole 12D of the connecting seat 10D, and then be inserted into the through hole 241D of the fixing portion 24D. That is, the method of inserting the positioning pin 32D to fix the fixing portion 24D and the connecting seat 10D is not limited to the order of inserting the through hole 241D and the insertion hole 12D. As long as the positioning pin 32D is inserted into the fixing portion 24D and the connecting seat 10D, the fixing portion 24D and the connecting seat 10D can be detachably combined.

[0118] Please see Fig.14 As shown, it is a quick-detachable support frame 100E of the sixth preferred embodiment of the utility model, which is connected to a connecting seat 10E on a transport element A, wherein the transport element A is a chain plate and the connecting seat 10E has a socket 12E. The quick-detachable support frame 100E also includes a support rod 20E, a positioning latch 32E and two elastic hooks 344E. The support rod 20E has a fixed portion 24E. The positioning latch 32E includes a latch rod 321E and a positioning block 322E elastically combined with the peripheral side of the latch rod 321E, and the latch rod 321E is connected to the fixed portion 24E. The two elastic hooks 344E are connected to opposite sides of the fixed portion 24E.

[0119] When the fixing portion 24E of the support rod 20E is detachably coupled to the connecting seat 10E by the positioning latch 32E, the latch rod 321E is inserted into the insertion hole 12E of the connecting seat 10E, and the positioning block 322E is fixed against the periphery of the insertion hole 12E. The two elastic hooks 344E connected to the opposite sides of the fixing portion 24E are clamped on the opposite sides of the connecting seat 10E in a relative manner, further fixing the fixing portion 24E to the connecting seat 10E.

[0120] The above description is only a preferred feasible embodiment of the present utility model. Any equivalent changes made by applying the specification and claims of the present utility model should be included in the patent scope of the present utility model.

Claims

1. A quick-release support frame, characterized in that: A transport element is connected to a connecting seat, and includes a support rod and a quick-release element, wherein: The support rod has a fixing portion; The quick-release element includes a positioning pin and a head, wherein the head is connected to the positioning pin; the positioning pin is detachably inserted into the fixing portion and the connecting seat.

2. The quick-release support frame according to claim 1, characterized in that: The connecting seat is a plate body and has a socket; the positioning pin includes a pin rod and a positioning block elastically combined with the pin rod, the pin rod passes through the fixing portion and is inserted into the socket, and the positioning block is buckled and fixed on the periphery of the socket.

3. The quick-release support frame according to claim 1, characterized in that: The connecting seat has a top wall and a peripheral wall, the top wall has an insertion hole, the peripheral wall has a side hole, one end of the side hole passes through the peripheral wall and the other end is communicated with the periphery of the insertion hole; the positioning pin includes a pin rod and a positioning block elastically combined with the pin rod, the pin rod passes through the fixing portion and is inserted into the insertion hole, and the positioning block is buckled into the side hole for fixing.

4. The quick-release support frame according to claim 1 or 2, characterized in that: The head has a cover plate, a receiving groove in the middle of the cover plate and two side portions adjacent to the receiving groove on opposite sides, the two side portions of the cover plate are respectively connected to an elastic hook; the fixing portion of the support rod is accommodated in the receiving groove, the two side portions are against the connecting seat, and the two elastic hooks are clamped and fixed on opposite sides of the connecting seat.

5. The quick-release support frame according to any one of claims 1 to 3, characterized in that: The head is a block and has a groove, wherein the groove has a deep groove portion with a deeper recessed depth and a shallow groove portion with a shallower recessed depth, and a shoulder is formed between the deep groove portion and the shallow groove portion; the fixing portion of the support rod is accommodated in the deep groove portion, and the connecting seat is accommodated in the shallow groove portion.

6. The quick-release support frame according to claim 1, characterized in that: The connecting seat has an insertion hole; the fixing portion of the support rod has a through hole; the positioning pin of the quick-release element passes through the through hole of the fixing portion and is inserted into the insertion hole of the connecting seat.

7. The quick-release support frame according to claim 6, characterized in that: The through hole is a round hole or a U-shaped hole.

8. The quick-release support frame according to claim 6, characterized in that: The head has an inner surface, and the inner surface abuts against the surface of the fixing portion of the support rod; the positioning latch has a latch rod, and one end of the latch rod is welded to the inner surface.

9. The quick-release support frame according to claim 6, characterized in that: The head has a screw hole; the positioning pin has a pin rod, one end of the pin rod forms a screw part, and the screw part is screwed and fixed in the screw hole.

10. The quick-release support frame according to claim 1, characterized in that: The transport element is a chain plate, and the connecting seat extends outward from the edge of the transport element.

11. A quick-release support frame, characterized in that: A connecting seat is connected to a transport element and includes a support rod and a positioning pin, wherein: The support rod has a fixing portion; The positioning pin is connected to the fixing portion, and the positioning pin is detachably inserted into the connecting seat, thereby detachably combining the support rod with the connecting seat.

12. The quick-release support frame according to claim 11, characterized in that: The connecting seat has a plug hole; the positioning pin includes a plug rod and a positioning block elastically combined with the plug rod, the plug rod is inserted into the plug hole, and the positioning block is buckled and fixed on the periphery of the plug hole.

13. The quick-release support frame according to claim 11 or 12, characterized in that: Two elastic hooks are respectively connected to opposite sides of the fixing portion, and the two elastic hooks are clamped and fixed to opposite sides of the connecting seat.

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