Clasping clamp for single-drop mold of individual-row machine

Abstract

The utility model relates to a single-drop mold holding clamp of a rank machine, which comprises a fixed shaft and two connecting arms, the connecting arms are rotatably connected to the fixed shaft, the connecting arms are connected with two clamping plates, the clamping plates are used for being contacted with a mold, the clamping plates are detachably connected to the connecting arms, the connecting arms are connected with connecting rods, the connecting rods penetrate through the connecting arms and the clamping plates along the length direction, and the connecting rods are connected with the clamping plates. A mounting cover sleeves one end of the connecting rod in a threaded manner and is in contact with the connecting arm. The mounting cover is rotated, so that the mounting cover is far away from the connecting rod, the connecting rod is conveniently taken out from the connecting arm, after the connecting rod is taken out from the connecting arm, the abraded clamping plate can be taken down from the connecting arm, a new clamping plate can be conveniently replaced, the production stability is improved, the production cost is reduced, and the waste of resources is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of row and column machines, in particular to a row and column machine single drop mold clamp. BACKGROUND

[0002] In the production process of integrated vessels, row and column machines are widely favored due to their high production capacity and low operating cost. Row and column machines are mainly used for producing various small-sized molded bottles, and significantly improve production efficiency and product quality through automated production lines. In recent years, with the increasing demand for integrated vessels in the market, the application range of row and column machines has been further expanded, and they have become the preferred equipment for many glass manufacturing enterprises.

[0003] At present, a single / double drop mold universal clamp is installed on the row and column machine, which is integrally formed. The single / double drop mold universal clamp clamps the mold used for processing molded bottles.

[0004] In view of the above related technology, since the clamp needs to be frequently moved when clamping the mold, the part of the clamp in contact with the mold is prone to wear. Once these parts are severely worn, the clamping effect of the clamp will be affected, which in turn affects the quality of the product. In order to ensure production stability, the clamp often needs to be replaced as a whole, which increases production cost and causes waste of resources. CONTENT OF THE UTILITY MODEL

[0005] In order to reduce production cost and reduce waste of resources, the present application provides a row and column machine single drop mold clamp.

[0006] The row and column machine single drop mold clamp provided by the present application adopts the following technical solution:

[0007] A row and column machine single drop mold clamp, comprising a fixed shaft and a connecting arm, the connecting arm is provided with two, the two connecting arms are symmetrically arranged, the connecting arm is rotatably connected to the fixed shaft, the connecting arm is connected with two clamping plates, the two clamping plates are sequentially and spacedly distributed along the length direction of the fixed shaft, the clamping plate is used for contacting with the mold, the clamping plate is detachably connected to the connecting arm, the connecting arm is connected with a connecting rod, the length direction of the connecting rod is consistent with the length direction of the fixed shaft, the connecting rod passes through the connecting arm and the clamping plate along the length direction thereof, and a mounting cover is threadedly provided at one end of the connecting rod, and the mounting cover is in contact with the connecting arm.

[0008] By adopting the above technical solution, when in use, the clamping plate contacts with the mold. When the lower clamping plate is worn after long-term use, the mounting cover is rotated to move away from the connecting rod, so that the connecting rod can be taken out of the connecting arm. After the connecting rod is taken out of the connecting arm, the worn clamping plate can be taken off from the connecting arm, so that a new clamping plate can be replaced, thereby improving production stability, reducing production cost and reducing waste of resources.

[0009] Optionally, the clamp plate comprises a first plate and a second plate, the first plate is provided with a first hole, the second plate is provided with a second hole, the first hole and the second hole are both semi-circular holes, the first hole and the second hole are consistent in diameter, the first plate and the second plate are detachably connected with each other, when the first plate and the second plate are installed, the first hole and the second hole are communicated and form a whole circle, and the connecting rod is slidably connected to the first hole and the second hole along the length direction thereof.

[0010] By adopting the above technical scheme, when one of the clamp plates arranged on the connecting arm is worn and affects the production stability, the first plate of the corresponding clamp plate is detached from the second plate, the first plate and the second plate are away from each other, and the first hole and the second hole are away from each other, so that the first plate and the second plate are away from the connecting rod, and the clamp plate is convenient to replace.

[0011] Optionally, the first plate is connected with a plug block at one end close to the second plate, the second plate is provided with a plug slot at one end close to the first plate for embedding the plug block, and the plug block is detachably connected in the plug slot by bolts.

[0012] By adopting the above technical scheme, when the clamp plate is installed, the first plate and the second plate are close to each other, the first hole and the second hole are communicated, the connecting rod passes through the first hole and the second hole, the plug block is embedded in the plug slot, and the plug block is stably connected to the plug slot by the bolts. In this way, the first plate is stably connected to the second plate, and the clamp plate is stably connected to the connecting arm.

[0013] Optionally, the connecting arm is provided with a connecting port for the connecting rod to pass through, the depth direction of the connecting port is consistent with the length direction of the connecting rod, the connecting rod is provided with an installation slot at the side, the length direction of the installation slot is consistent with the radial direction of the connecting rod, the first spring and the locking block are connected in the installation slot, the length direction of the first spring is consistent with the length direction of the installation slot, one end of the first spring is connected to the inner wall of the installation slot, the other end of the first spring is connected to the locking block, the locking block is slidably connected to the installation slot along the length direction of the installation slot, and the inner wall of the connecting port is provided with a locking slot for embedding the locking block.

[0014] By adopting the above technical scheme, in use, the first spring drives the locking block to be embedded in the locking slot, so that the connecting rod is stably connected to the connecting arm, and the situation that the connecting rod slides downward after the clamp plate arranged at the top end of the connecting rod is detached is avoided as much as possible, so that the new clamp plate is convenient to replace.

[0015] Optionally, the locking block is provided with a guide surface at one side along the length direction of the connecting rod, and the guide surface is inclined.

[0016] When both clamping plates on the connecting arm need to be replaced, the mounting sleeve is rotated to move away from the connecting rod, the connecting rod is slid along the length direction of the connecting rod, the guide surface contacts the inner wall of the locking groove, the locking block is embedded in the mounting groove under the guidance of the guide surface, so that the connecting rod is away from the connecting arm, and the clamping plate is replaced conveniently.

[0017] Optionally, the connecting arm comprises a first connecting block and a second connecting block, the length direction of the first connecting block is consistent with the length direction of the fixed shaft, the first connecting block is rotationally connected to the fixed shaft, two second connecting blocks are arranged, the two second connecting blocks are respectively connected to the two ends of the first connecting block along the length direction of the fixed shaft, the clamping plate corresponds to the second connecting block one by one, the clamping plate is connected to one end of the second connecting block, the connecting rod is sleeved with a support cylinder, the central axis of the support cylinder is collinear with the central axis of the connecting rod, the support cylinder is arranged between the two second connecting blocks, and the two ends of the support cylinder along the length direction thereof are respectively in contact with the two second connecting blocks.

[0018] By adopting the above technical scheme, the support cylinder is additionally arranged, and the two ends of the support cylinder are respectively in contact with the two second connecting blocks during use, so that the production stability is improved.

[0019] Optionally, the connecting arm is connected with a stop pin, the length direction of the stop pin is consistent with the length direction of the fixed shaft, the stop pin passes through the connecting arm and the clamping plate along the length direction thereof, the first plate is provided with a third hole, the second plate is provided with a fourth hole, the third hole and the fourth hole are both arranged as semicircular holes, the diameters of the third hole and the fourth hole are consistent, the third hole and the fourth hole are communicated and form a whole circle when the first plate and the second plate are installed, and the stop pin passes through and is slidably connected to the third hole and the fourth hole along the length direction thereof.

[0020] By adopting the above technical scheme, the stop pin is additionally arranged, the rotation of the clamping plate on the connecting arm is reduced, and the stability of the connection between the clamping plate and the connecting arm is improved.

[0021] Optionally, the second connecting block is connected with a support plate away from the other side of the second connecting block, the support plate is connected with a first magnetic block, one end of the stop pin is connected with a second magnetic block, and the support plate is rotationally connected to the connecting arm, after the support plate is rotated, one end of the stop pin is in contact with the support plate, and the first magnetic block and the second magnetic block are attracted to each other.

[0022] By adopting the above technical scheme, during use, the support plate is in contact with the stop pin, and the first magnetic block and the second magnetic block are attracted to each other, so that the stop pin is stably connected to the connecting arm, and the stop pin is prevented from sliding downward when the clamping plate arranged at the top end of the stop pin is disassembled, and the replacement of the clamping plate is facilitated.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. When in use, the clamping plate is in contact with the mold. When the lower clamping plate is worn after long-term use, the mounting cover is rotated to move away from the connecting rod, so that the connecting rod is taken out of the connecting arm, and the worn clamping plate is taken off the connecting arm after the connecting rod is taken out of the connecting arm, so that a new clamping plate is replaced, thereby improving production stability and reducing production cost and resource waste;

[0025] 2. When one of the clamping plates provided on the connecting arm is worn and affects the production stability, the first plate corresponding to the clamping plate is detached from the second plate, so that the first plate and the second plate are away from each other, and the first hole and the second hole are away from each other, so that the first plate and the second plate are away from the connecting rod, and the clamping plate is replaced;

[0026] 3. When in use, the first spring drives the locking block to be embedded in the locking groove, so that the connecting rod is stably connected to the connecting arm, and the situation that the connecting rod slides downward after the clamping plate provided at the top end of the connecting rod is detached is avoided as much as possible, so that a new clamping plate is replaced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of the embodiment.

[0028] Figure 2 is a front view of the embodiment.

[0029] Figure 3 is a sectional view of the embodiment Figure 2 in A-A direction.

[0030] Figure 4 is a perspective view of the clamping plate in the embodiment.

[0031] Figure 5 is a sectional view of the embodiment Figure 2 in B-B direction.

[0032] Figure 6 is a top view of the embodiment.

[0033] Figure 7 is a sectional view of the embodiment Figure 6 in C-C direction.

[0034] The reference signs are explained as follows: 100, fixed shaft; 200, connecting arm; 210, first connecting block; 220, second connecting block; 230, blocking pin; 231, second magnetic block; 240, connecting port; 241, locking groove; 300, clamping plate; 310, first plate; 311, first hole; 312, third hole; 313, insertion block; 320, second plate; 321, second hole; 322, fourth hole; 323, insertion groove; 400, connecting rod; 410, fixed block; 420, mounting cover; 430, support cylinder; 440, mounting groove; 441, first spring; 442, locking block; 500, support plate; 510, rotating rod; 520, first magnetic block. DETAILED DESCRIPTION

[0035] The following will be described in detail below with reference to the accompanying drawings. Figures 1-7 The present application is further described in detail.

[0036] The embodiment of the present application discloses a single-drop mold gripper of a row-column machine. Referring to Figure 1 and Figure 2 A single-drop mold gripper of a row-column machine comprises a fixed shaft 100 and a connecting arm 200, one end of the connecting arm 200 being rotatably connected to the fixed shaft 100, and the rotating axis of the connecting arm 200 being collinear with the central axis of the fixed shaft 100. Two connecting arms 200 are provided, and the two connecting arms 200 are symmetrically arranged. The connecting arm 200 is detachably connected with two clamping plates 300, and the two clamping plates 300 are sequentially and spacedly arranged along the length direction of the fixed shaft 100, and the clamping plate 300 is used to contact the mold. The connecting arm 200 is connected with a connecting rod 400, the length direction of the connecting rod 400 is consistent with the length direction of the fixed shaft 100, and the connecting rod 400 passes through the connecting arm 200 and the clamping plate 300 along the length direction thereof. One end of the connecting rod 400 along the length direction thereof is connected with a fixed block 410, and the fixed block 410 is in contact with the clamping plate 300 close to one end of the connecting rod 400. The end of the connecting rod 400 away from the fixed block 410 is threadedly sleeved with a mounting cover 420, and the mounting cover 420 is in contact with the connecting arm 200. The connecting arm 200 and the clamping plate 300 are arranged between the fixed block 410 and the mounting cover 420. When the clamping plate 300 is replaced, the mounting cover 420 is rotated away from the connecting rod 400, so that the connecting rod 400 is moved along the length direction thereof, and the connecting rod 400 is away from the connecting arm 200, so that the clamping plate 300 is replaced.

[0037] Referring to Figure 1 and Figure 2The connecting arm 200 comprises a first connecting block 210 and a second connecting block 220. The length direction of the first connecting block 210 is consistent with the length direction of the fixed shaft 100. The first connecting block 210 is rotationally connected to the fixed shaft 100. The rotation axis of the first connecting block 210 is collinear with the central axis of the fixed shaft 100. The second connecting block 220 is provided with two ends connected to the first connecting block 210. The two second connecting blocks 220 are sequentially and spacedly distributed along the length direction of the fixed shaft 100.

[0038] Referring to Figure 1 and Figure 2 The clamping plate 300 corresponds to the second connecting block 220. The two clamping plates 300 are connected to the same end of the two second connecting blocks 220. The connecting rod 400 is sleeved with a support cylinder 430. The central axis of the support cylinder 430 is collinear with the central axis of the connecting rod 400. The support cylinder 430 is arranged between the two second connecting blocks 220. One end of the support cylinder 430 is in contact with the second connecting block 220 along the length direction of the support cylinder 430. The other end of the support cylinder 430 is in contact with the clamping plate 300. The connecting rod 400 is slidingly connected to the support sleeve along the length direction of the connecting rod 400.

[0039] Referring to Figure 2 and Figure 3 The connecting arm 200 is connected with a stop pin 230. The length direction of the stop pin 230 is consistent with the length direction of the connecting rod 400. The stop pin 230 penetrates the second connecting block 220 and the clamping plate 300 along the length direction of the stop pin 230. The second connecting block 220 is provided with a support plate 500 away from the clamping plate 300. The support plate 500 is a circular plate. The support plate 500 is arranged on one side of the stop pin 230 along the length direction of the stop pin 230. The support plate 500 is connected to the second connecting block 220 through a rotating rod 510. The length direction of the rotating rod 510 is consistent with the length direction of the connecting rod 400. One end of the rotating rod 510 is rotationally connected to the second connecting block 220. The other end of the rotating rod 510 is connected to the support plate 500 at a position other than the center of the support plate 500.

[0040] Referring to Figure 1 and Figure 3 The support plate 500 is embedded with a first magnetic block 520. One end of the stop pin 230 close to the support plate 500 is connected with a second magnetic block 231. After the support plate 500 is rotated, one end of the stop pin 230 is in contact with the support plate 500. The first magnetic block 520 and the second magnetic block 231 attract each other.

[0041] Referring to Figure 1 and Figure 4, the clamp 300 comprises a first plate 310 and a second plate 320, one end of the first plate 310 is close to one end of the second plate 320 and detachably connected. The first plate 310 is provided with a first hole 311 close to one end of the second plate 320, the second plate 320 is provided with a second hole 321 close to one end of the first plate 310, the depth direction of the first hole 311 is consistent with the length direction of the connecting rod 400, and the depth direction of the second hole 321 is consistent with the length direction of the connecting rod 400. The diameter of the first hole 311 is the same as that of the second hole 321, and the first hole 311 and the second hole 321 are both provided as semicircular holes.

[0042] Referring to Figure 1 and Figure 4 , the first plate 310 is further provided with a third hole 312 close to one end of the second plate 320, the depth direction of the third hole 312 is consistent with the length direction of the connecting rod 400, and the second plate 320 is further provided with a fourth hole 322 close to one end of the first plate 310, the depth direction of the fourth hole 322 is consistent with the length direction of the connecting rod 400. The third hole 312 and the fourth hole 322 are both provided as semicircular holes, and the diameter of the third hole 312 is consistent with that of the fourth hole 322.

[0043] Referring to Figure 1 and Figure 4 , when the first plate 310 and the second plate 320 are installed, the first hole 311 and the second hole 321 are communicated and constitute a whole circle, and the third hole 312 and the fourth hole 322 are communicated and constitute a whole circle. The connecting rod 400 is connected to the hole formed by the first hole 311 and the second hole 321 in the length direction, and the stop pin 230 is connected to the hole formed by the third hole 312 and the fourth hole 322 in the length direction.

[0044] When the clamp 300 is disassembled, the first plate 310 is disassembled from the second plate 320, so that the first hole 311 and the second hole 321 are away from each other, so that the first plate 310 and the second plate 320 are away from the connecting rod 400 and the stop pin 230, thereby facilitating the replacement of the clamp 300,

[0045] Referring to Figure 5 and Figure 6 , the first plate 310 is connected with two insertion blocks 313 close to one end of the second plate 320, and the first hole 311 and the third hole 312 are arranged between the two insertion blocks 313. The second plate 320 is provided with two insertion slots 323 close to one end of the first plate 310, and the second hole 321 and the fourth hole 322 are arranged between the two insertion slots 323. The insertion block 313 corresponds to the insertion slot 323 one by one, the insertion block 313 is embedded in the insertion slot 323, and the insertion block 313 is detachably connected in the insertion slot 323 through a bolt, and the bolt passes through the inner wall of one end of the insertion slot 323 in the length direction of the connecting rod 400 and is threadedly connected to the insertion block 313.

[0046] Referring to Figure 6 andFigure 7 The second connecting block 220 is provided with a connecting port 240 for the connecting rod 400 to pass through, and the depth direction of the connecting port 240 is consistent with the length direction of the connecting rod 400. The connecting rod 400 passes through and is slidably connected in the connecting port 240 along the length direction thereof. The connecting rod 400 is provided with a mounting groove 440 on the side thereof, and the length direction of the mounting groove 440 is consistent with the radial direction of the connecting rod 400. The first spring 441 and the locking block 442 are connected in the mounting groove 440. The length direction of the first spring 441 is consistent with the length direction of the mounting groove 440. One end of the first spring 441 is connected to the inner wall of the mounting groove 440 along the length direction thereof, and the other end of the first spring 441 is connected to the locking block 442. The locking block 442 is slidably connected in the mounting groove 440 along the length direction thereof.

[0047] With reference to Figure 7 An inner wall of one connecting port 240 is provided with a locking groove 241 for the locking block 442 to be embedded in, and the depth direction of the locking groove 241 is consistent with the radial direction of the connecting rod 400. The locking block 442 is provided with a guide surface on both sides thereof along the length direction of the connecting rod 400. The guide surface is arranged at the end of the locking block 442 away from the first spring 441, and is arranged to be inclined. The guide surface facilitates the locking block 442 to be away from the locking groove 241. In use, the locking block 442 is embedded in the locking groove 241, so that the connecting rod 400 is stably connected in the connecting port 240, and the clamping plate 300 is facilitated to be replaced.

[0048] The implementation principle of the single-drop mold gripper of the row-and-column machine according to the embodiment of the application is as follows: when the clamping plate 300 is worn, the bolt is loosened, so that the plug block 313 is taken out from the plug groove 323, the first plate 310 and the second plate 320 are moved to be away from each other, the plug block 313 is away from the plug groove 323, the first hole 311 and the second hole 321 are away from each other, the third hole 312 and the fourth hole 322 are away from each other, and the first plate 310 and the second plate 320 are away from the connecting rod 400, so that the clamping plate 300 is facilitated to be detached from the connecting arm 200. When a new clamping plate 300 is installed, the first plate 310 and the second plate 320 are moved to be close to each other, the plug block 313 is embedded in the plug groove 323, and the plug block 313 is installed in the plug groove 323 through the bolt, so that the first plate 310 and the second plate 320 are stably connected, and the clamping plate 300 is stably connected to the connecting arm 200, so that the clamping plate 300 is facilitated to be replaced, the production stability is improved, the production cost is reduced, and the waste of resources is reduced.

[0049] The above are the preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the application should be covered by the protection scope of the application.

Claims

1. A row machine single drop mold clamp, comprising a fixed shaft (100), connecting arms (200), the connecting arms (200) are provided with two, the two connecting arms (200) are symmetrically arranged, the connecting arms (200) are rotationally connected to the fixed shaft (100), the connecting arms (200) are connected with two clamping plates (300), the two clamping plates (300) are sequentially and spacedly distributed along the length direction of the fixed shaft (100), and the clamping plates (300) are used for contacting with a mold, characterized in that: The clamping plate (300) is detachably connected to the connecting arm (200), the connecting arm (200) is connected with a connecting rod (400), the length direction of the connecting rod (400) is consistent with the length direction of the fixed shaft (100), the connecting rod (400) passes through the connecting arm (200) and the clamping plate (300) along the length direction, and one end of the connecting rod (400) is threadedly sleeved with a mounting cover (420). ​ 2. A single drop mold gripper for a matrix machine according to claim 1, characterized in that: The clamping plate (300) comprises a first plate (310) and a second plate (320), the first plate (310) is provided with a first hole (311), the second plate (320) is provided with a second hole (321), the first hole (311) and the second hole (321) are both provided as semicircular holes, the diameters of the first hole (311) and the second hole (321) are consistent, the first plate (310) and the second plate (320) are detachably connected with each other, when the first plate (310) and the second plate (320) are installed, the first hole (311) and the second hole (321) are communicated and constitute a whole circle, and the connecting rod (400) passes through and is slidably connected to the first hole (311) and the second hole (321) along the length direction.

3. A single drop mold gripper for a matrix machine as defined in claim 2, wherein: The first plate (310) is connected with an insertion block (313) at one end close to the second plate (320), the second plate (320) is provided with an insertion slot (323) for embedding the insertion block (313) at one end close to the first plate (310), and the insertion block (313) is detachably connected in the insertion slot (323) through bolts.

4. A single drop mold gripper for a matrix machine as defined in claim 1, wherein: The connecting arm (200) is provided with a connecting port (240) for passing through the connecting rod (400), the depth direction of the connecting port (240) is consistent with the length direction of the connecting rod (400), the connecting rod (400) is provided with a mounting groove (440) on the side, the length direction of the mounting groove (440) is consistent with the radial direction of the connecting rod (400), the first spring (441) and the locking block (442) are connected in the mounting groove (440), the length direction of the first spring (441) is consistent with the length direction of the mounting groove (440), one end of the first spring (441) is connected to the inner wall of the mounting groove (440), the other end of the first spring (441) is connected to the locking block (442), the locking block (442) is slidably connected in the mounting groove (440) along the length direction of the mounting groove (440), and the inner wall of the connecting port (240) is provided with a locking groove (241) for embedding the locking block (442), and in use, the locking block (442) is embedded in the locking groove (241).

5. A single drop mold gripper for a matrix machine as defined in claim 4, wherein: The locking block (442) is provided with a guide surface on one side along the length direction of the connecting rod (400), the guide surface is inclinedly arranged, and the guide surface facilitates the locking block (442) to move away from the locking groove (241).

6. A single drop mold gripper for a matrix machine as defined in claim 2, wherein: The connecting arm (200) comprises a first connecting block (210) and a second connecting block (220), the length direction of the first connecting block (210) is consistent with the length direction of the fixed shaft (100), the first connecting block (210) is rotationally connected to the fixed shaft (100), the second connecting block (220) is provided with two, the two second connecting blocks (220) are respectively connected to the two ends of the first connecting block (210) along the length direction of the fixed shaft (100), the clamping plate (300) corresponds to the second connecting block (220) one by one, the clamping plate (300) is connected to one end of the second connecting block (220), the connecting rod (400) is sleeved with a support cylinder (430), the central axis of the support cylinder (430) is collinear with the central axis of the connecting rod (400), the support cylinder (430) is arranged between the two second connecting blocks (220), and the support cylinder (430) is in contact with the two second connecting blocks (220) at the two ends along the length direction thereof.

7. A single drop mold gripper for a matrix machine according to claim 6, wherein: The connecting arm (200) is connected with a stop pin (230), the length direction of the stop pin (230) is consistent with the length direction of the fixed shaft (100), the stop pin (230) passes through the connecting arm (200) and the clamping plate (300) along the length direction thereof, the first plate (310) is provided with a third hole (312), the second plate (320) is provided with a fourth hole (322), the third hole (312) and the fourth hole (322) are both provided as semicircular holes, the diameters of the third hole (312) and the fourth hole (322) are consistent, when the first plate (310) and the second plate (320) are installed, the third hole (312) and the fourth hole (322) are communicated and constitute an integral circle, and the stop pin (230) passes through and is slidably connected to the third hole (312) and the fourth hole (322) along the length direction thereof.

8. A single drop mold gripper for a matrix machine according to claim 7, characterized in that: The second connecting block (220) is connected with a support plate (500) away from the other second connecting block (220), the support plate (500) is connected with a first magnetic block (520), one end of the stop pin (230) is connected with a second magnetic block (231), and the support plate (500) is rotationally connected to the connecting arm (200). When the support plate (500) rotates, one end of the stop pin (230) is in contact with the support plate (500), and the first magnetic block (520) and the second magnetic block (231) attract each other.

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