Printing ink wear resistance detection equipment
By designing a printing product ink wear resistance detection device including a material loading mechanism, a transfer mechanism and a plurality of downcoming mechanisms, the problem that existing equipment needs to replace equipment when simulating different usage environments is solved, and low-cost and high-efficiency wear resistance detection is achieved.
Patent Information
- Application Number
- CN202421770083.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-24
AI Technical Summary
Existing wear resistance detection equipment needs to replace different models of equipment when simulating different usage environments, resulting in higher testing costs.
A wear resistance detection device for printing inks is designed, which includes a loading mechanism, a displacement mechanism and a plurality of downpressure mechanisms. The load mechanism realizes horizontal movement of the printed product through the carrier and the transfer mechanism, and the downward mechanism simulates different frictional scenes through the grinding belt and adjustable weight parts.
The equipment can simulate the friction force of different usage environments by adjusting the friction coefficient of the grinding belt and the pressure of the downward mechanism without replacing the equipment, thereby reducing detection costs and improving detection efficiency.
Smart Images

Figure CN222979338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ink printing processing, in particular to an ink abrasion resistance detection device for printed products. Background Art
[0002] Ink is an important material for printing. It presents patterns and texts on a substrate through printing or spraying, so that an ink pattern is formed on the surface of the substrate to produce printed products.
[0003] During the use of printed products, they will come into contact with surrounding objects and generate friction. For printed products with poor ink adhesion ability, during the friction process, the ink pattern will appear blurred, peeled off, decolorized and other phenomena. In order to ensure the quality of printed products, the produced printed products need to be tested for wear resistance by a wear resistance detection device.
[0004] The existing wear resistance detection device fixes the pressure on the printed product, so the friction force between the two is fixed. However, in actual use, the usage environment of the printed product is different, and the friction force between the surrounding objects and the printed product is also different. Therefore, when simulating different scenarios, different models of equipment need to be replaced, resulting in a high detection cost. Content of the Utility Model
[0005] To solve the above technical problems and achieve at least one advantage of the present utility model, the present utility model provides an ink abrasion resistance detection device for printed products, and the ink abrasion resistance detection device for printed products includes:
[0006] A device main body;
[0007] A loading mechanism, the loading mechanism includes a loading member, wherein the loading member has a loading surface, and the printed product is laid on the loading surface of the loading member with the printing surface facing away from the loading surface;
[0008] A driving mechanism, the driving mechanism is installed on the device main body, and the loading member is drivingly connected to the driving mechanism, and the driving mechanism is configured to be able to drive the loading member to reciprocate along a horizontal plane;
[0009] At least one pressing mechanism, the pressing mechanism includes a pressing main body and a counterweight, the pressing main body forms a pressing end, one end of the pressing main body far from the end forming the pressing end is pivotally installed on the device main body, wherein the pressing end can turn towards or away from the loading surface along a vertical plane, the counterweight is detachably installed on the pressing end, and an abrasive belt is installed on the side of the pressing end that can abut against the loading surface.
[0010] According to an embodiment of the present utility model, the pressing main body forms an assembly structure, the counterweight forms a connection structure, either the assembly structure or the connection structure is implemented as a bolt, and the other is implemented as a threaded hole, and the assembly structure is threadedly connected to the connection structure.
[0011] According to an embodiment of the present utility model, the device main body forms a guiding structure, the carrier is slidably mounted on the guiding structure, and the guiding structure is used to define the moving direction of the carrier.
[0012] According to an embodiment of the present utility model, the printing product ink abrasion resistance detection device is provided with a plurality of the pressing mechanisms, and the plurality of the pressing mechanisms are arranged above the carrier at intervals.
[0013] According to an embodiment of the present utility model, the bearing surface extends in a curved shape along the moving direction of the carrier driven by the displacement mechanism, and during the process of the displacement mechanism driving the carrier to move in the horizontal direction, the pressing mechanism rotates according to the corresponding position of the bearing surface, and the abrasive belt mounted on the pressing end keeps in contact with the printing surface.
[0014] According to an embodiment of the present utility model, the loading mechanism further includes at least a pair of pressing and fixing components, and the two pressing and fixing components arranged in a pair are symmetrically mounted on opposite sides of the carrier. Each pressing and fixing component includes a pressing member and a belt moving member. The pressing member forms an abutting wall, the belt moving member is mounted on the carrier, the pressing member is mounted on the belt moving member, and the pressing member is located on the upper surface of the carrier. The belt moving member can drive the pressing member to move so that the abutting wall approaches or moves away from the carrier in a vertical plane.
[0015] According to an embodiment of the present utility model, the pressing member has a pressing protrusion, the abutting wall is formed on the pressing protrusion, the belt moving member includes a belt rotating shaft and a state maintaining member. The state maintaining member is sleeved on the belt rotating shaft in a manner capable of elastic deformation and is arranged between the carrier and the pressing member. The belt rotating shaft is pivotally mounted on the carrier, the axial direction of the belt rotating shaft extends in the horizontal direction, the pressing member is fixedly mounted on the belt rotating shaft, the belt rotating shaft can drive the pressing member to rotate in the same direction, and the state maintaining member drives the pressing protrusion to keep in contact with the carrier through the belt rotating shaft.
[0016] According to an embodiment of the present utility model, the belt moving member further includes a hand-held member, and the hand-held member is fixedly mounted on the end of the belt rotating shaft away from the pressing member.
[0017] According to an embodiment of the present utility model, the loading mechanism is provided with a plurality of pairs of the pressing and fixing components, and the plurality of pairs of the pressing and fixing components are distributed at intervals.
[0018] According to an embodiment of the present utility model, each of the pressing mechanisms further includes a clamping component, the clamping component is detachably mounted on the pressing end, the clamping component includes a fixed frame, a movable member and a reset member, the movable member includes a sliding portion and a connecting portion, the sliding portion is slidably mounted on the fixed frame, and the sliding portion and the fixed frame together form an adjustable clamping space, the connecting portion is connected to the sliding portion and penetrates the fixed frame, wherein a part of the connecting portion extending out of the fixed frame is for a tester to apply force to squeeze, the reset member is arranged to be elastically deformed and mounted between the fixed frame and the movable member, when the connecting portion drives the sliding portion to move in the direction of extending into the fixed frame, the reset member is elastically deformed and has a tendency to drive the movable member to move in the direction of extending out of the fixed frame. Description of the Drawings
[0019] Figure 1 Shows a schematic structural view of the printing product ink abrasion resistance detection device of the present utility model.
[0020] Figure 2 Shows Figure 1 An enlarged view of the structure of part A in
[0021] Figure 3 Shows a sectional view of the printing product ink abrasion resistance detection device of the present utility model.
[0022] Figure 4 Shows a schematic structural view of the clamping component of the present utility model. Detailed Description of the Invention
[0023] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other embodiments, variations, improvements, equivalent schemes and other technical schemes that do not depart from the spirit and scope of the present utility model.
[0024] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the above terms should not be construed as limiting the present utility model.
[0025] It is understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.
[0026] Reference Figures 1 to 4 , the ink abrasion resistance detection device of a preferred embodiment of the present utility model will be elaborated in detail below. The ink abrasion resistance detection device of the printed product rubs against the side of the printed product with ink to detect the abrasion resistance of the ink. For the convenience of understanding, the side of the printed product with ink is now defined as the printing surface.
[0027] The ink abrasion resistance detection device of the printed product includes a device main body 10, a loading mechanism 20, at least one pressing mechanism 30 and a displacement mechanism 40.
[0028] The loading mechanism 20 includes a carrier 21, wherein the carrier 21 has a loading surface 2101. The printed product is laid on the loading surface 2101 of the carrier 21 with the printing surface facing away from the loading surface 2101.
[0029] The pressing mechanism 30 includes a pressing main body 31. The pressing main body 31 forms a pressing end 311. One end of the pressing main body 31 away from the end where the pressing end 311 is formed is pivotally mounted on the device main body 10, wherein the pressing end 311 can turn or turn away from the loading surface 2101 along a vertical plane. When the pressing main body 31 rotates, a grinding belt can be installed on the side of the pressing end 311 facing the loading surface 2101, and the grinding belt has a preset friction coefficient. The displacement mechanism 40 is installed on the device main body 10, and the carrier 21 is drivingly connected to the displacement mechanism 40. The displacement mechanism 40 is arranged to be able to drive the carrier 21 to reciprocate along a horizontal plane.
[0030] Specifically, when the printed product is laid on the loading surface 2101 of the carrier 21 with the printing surface facing away from the loading surface 2101, the pressing main body 31 turns along the vertical plane towards the carrier 21 until the pressing end 311 overlaps the printing surface. Subsequently, the displacement mechanism 40 drives the carrier 21 to move along the horizontal plane, so that the grinding belt installed on the pressing end 311 repeatedly rubs against the printing surface. It is understood that under long-term friction, the ink on the printing surface will gradually become blurred. Therefore, the wear condition of the printing surface can be observed by fixing the number of friction times or limiting the friction time to judge the abrasion resistance of the ink.
[0031] In one example, the displacement mechanism 40 is implemented to include a motor.
[0032] Preferably, the pressing mechanism 30 further includes a counterweight 32. The counterweight 32 is detachably mounted on the pressing end 311. By disassembling and assembling the counterweight 32 and the pressing end 311 to adjust the pressure of the pressing mechanism 30 on the printing surface, in this way, when the displacement mechanism 40 drives the carrier 21 to move along the horizontal plane, the friction force between the abrasive belt mounted on the pressing end 311 and the printing surface can be adjusted, so that the wear resistance of the ink on the printing surface can be detected under different friction forces, thereby simulating different usage scenarios.
[0033] As a preference, the pressing main body 31 forms an assembly structure 312, and the counterweight 32 forms a connection structure. Either the assembly structure 312 or the connection structure is implemented as a bolt, and the other is implemented as a threaded hole. The assembly structure 312 is threadedly connected to the connection structure, and the pressing main body 31 realizes disassembly and assembly with the counterweights 32 of different grammages through the cooperation of the assembly structure 312 and the connection structure, so as to adjust the pressure of the pressing mechanism 30 on the printing surface and adjust the friction force between the abrasive belt mounted on the pressing end 311 and the printing surface.
[0034] Preferably, the equipment main body 10 forms a guiding structure 11, the carrier 21 is slidably mounted on the guiding structure 11, and the guiding structure 11 is used to define the moving direction of the carrier 21.
[0035] In one example, the guiding structure 11 is implemented as a guide rail or a polished rod.
[0036] In a preferred embodiment, the printing product ink wear resistance detection equipment is provided with a plurality of the pressing mechanisms 30, and the plurality of the pressing mechanisms 30 are spaced above the carrier 21, so that the plurality of the pressing mechanisms 30 can simultaneously perform wear resistance detection on the printing surfaces formed by the plurality of printing products carried by the carrier 21 respectively or / and the ink at different parts of the same printing product, so as to improve the detection efficiency.
[0037] In one example, a printing product laid flat on the upper surface of the carrier 21 has a plurality of patterns printed with ink. After each of the pressing main bodies 31 is respectively assembled with the counterweights 32 of different weights, each of the pressing mechanisms 30 corresponds to each pattern respectively. In this way, after the displacement mechanism 40 drives the carrier 21 to reciprocate along the horizontal plane for a predetermined time or number of times, the degree of wear of each pattern on the printing product can be observed.
[0038] In one embodiment, the bearing surface 2101 extends in the horizontal direction.
[0039] Deformably, the bearing surface 2101 extends in a curved shape along the moving direction of the driving mechanism 40 driving the bearing member 21. During the process of the driving mechanism 40 driving the bearing member 21 to move horizontally, the pressing mechanism 30 rotates according to the corresponding position of the bearing surface 2101, so that the abrasive belt installed at the pressing end 311 remains in contact with the printing surface, to simulate the scenario where the outer packaging printed with ink rubs against other objects during actual transportation or transfer, so that the results detected by the device are more in line with the actual situation.
[0040] Further, the loading mechanism 20 further includes at least a pair of pressing and fixing components 22. The two pressing and fixing components 22 arranged in a pair are symmetrically installed on opposite sides of the bearing member 21.
[0041] Specifically, each pressing and fixing component 22 includes a pressing member 221 and a belt moving member 222. The pressing member 221 forms an abutting wall 2211. The belt moving member 222 is installed on the bearing member 21. The pressing member 221 is installed on the belt moving member 222, and the pressing member 221 is located on the upper surface of the bearing member 21. The belt moving member 222 can drive the pressing member 221 to move so that the abutting wall 2211 approaches or moves away from the bearing member 21 in the vertical plane. When the abutting wall 2211 moves away from the bearing member 21 in the vertical plane, there is a gap between the pressing member 221 and the bearing member 21 for the end of the printed product to pass through or move out; when the abutting wall 2211 moves close to the bearing member 21 in the vertical plane, the pressing member 221 fixes the end of the printed product to prevent the printed product from moving during the detection process.
[0042] In one embodiment, the belt moving member 222 drives the pressing member 221 to move in the vertical direction. When the belt moving member 222 drives the pressing member 221 to move downward to approach the bearing member 21, the end of the printed product is fixed; when the belt moving member 222 drives the pressing member 221 to move upward to move away from the bearing member 21, the end of the printed product is released.
[0043] In one example, the belt moving member 222 is implemented to include a cylinder.
[0044] Deformably, the pressing member 221 has a pressing protrusion 22101, and the abutting wall 2211 is formed on the pressing protrusion 22101. The tape moving member 222 includes a tape rotating shaft 2221 pivotally mounted on the carrier 21, and the axial direction of the tape rotating shaft 2221 extends horizontally. The pressing member 221 is fixedly mounted on the tape rotating shaft 2221 such that the tape rotating shaft 2221 can drive the pressing member 221 to rotate in the same direction. The carrier 21 is located on the rotation path of the pressing protrusion 22101. In this way, when the tape rotating shaft 2221 drives the pressing member 221 to move the pressing protrusion 22101 closer to the carrier 21, the end of the printed product is pressed and fixed by the pressing protrusion 22101; when the tape rotating shaft 2221 drives the pressing member 221 to move the pressing protrusion 22101 away from the carrier 21, the end of the printed product is released.
[0045] Preferably, the tape moving member 222 further includes a state maintaining member 2222. The state maintaining member 2222 is sleeved on the tape rotating shaft 2221 in a manner capable of elastic deformation and is disposed between the carrier 21 and the pressing member 221. The state maintaining member 2222 drives the pressing protrusion 22101 to keep abutting against the carrier 21 through the tape rotating shaft 2221.
[0046] When the tape rotating shaft 2221 is driven to rotate and drive the pressing member 221 to move the pressing protrusion 22101 away from the carrier 21, the state maintaining member 2222 undergoes elastic deformation and has a tendency to drive the pressing protrusion 22101 to rotate closer to the carrier 21. At this time, the end of the printed product can be inserted into or withdrawn from between the pressing protrusion 22101 and the carrier 21. When the tape rotating shaft 2221 loses the driving force, the tape rotating shaft 2221 drives the pressing member 221 to reset under the elastic force of the state maintaining member 2222, so that the pressing protrusion 22101 presses down the end of the printed piece, and the end of the printed product is fixed.
[0047] In one example, the state maintaining member 2222 is implemented to include a spring.
[0048] Preferably, the tape moving member 222 further includes a hand-held member 2223. The hand-held member 2223 is fixedly mounted on one end of the tape rotating shaft 2221 away from the pressing member 221 to facilitate the tester to manually rotate the tape rotating shaft 2221.
[0049] In a preferred embodiment, a plurality of pairs of the pressing and fixing assemblies 22 are provided on the load-carrying mechanism 20, and the plurality of pairs of the pressing and fixing assemblies 22 are spaced apart, so that the plurality of pairs of the pressing and fixing assemblies 22 can simultaneously fix the respective ends of a plurality of printed products carried by the carrier 21 or / and multiple positions of the same printed product.
[0050] Further, each of the pressing mechanisms 30 further includes a clamping assembly 33. The clamping assembly 33 is detachably mounted on the pressing end 311 for disassembling and assembling the abrasive belt.
[0051] Specifically, the clamping assembly 33 includes a fixed frame 331, a movable member 332, and a reset member 333. The movable member 332 includes a sliding portion 3321 and a connecting portion 3322. The sliding portion 3321 is slidably mounted on the fixed frame 331, and the sliding portion 3321 and the fixed frame 331 together form an adjustable clamping space 3301. The connecting portion 3322 is connected to the sliding portion 3321 and penetrates through the fixed frame 331, and a portion of the connecting portion 3322 extending out of the fixed frame 331 is for an inspector to apply force to squeeze, so as to adjust the size of the clamping space 3301. The reset member 333 is arranged to be elastically deformable and mounted between the fixed frame 331 and the movable member 332. When the connecting portion 3322 drives the sliding portion 3321 to move in the direction of extending into the fixed frame 331, the reset member 333 is elastically deformed and has a tendency to drive the movable member 332 to move in the direction of extending out of the fixed frame 331, and the clamping space 3301 is enlarged, so that the pressing end 311 wrapping the abrasive belt can be moved into the clamping space 3301; when the pressure on the connecting portion 3322 is lost, the reset member 333 drives the movable member 332 to move in the direction of extending out of the fixed frame 331 under the action of the elastic force, so that the clamping space 3301 is reduced, and the inner wall of the clamping space 3301 abuts against the circumferential side of the abrasive belt, so that the abrasive belt is assembled with the pressing end 311.
[0052] In this way, since the pressing end 311 and the abrasive belt are detachably mounted through the clamping assembly 33, an inspector can replace the abrasive belt with a predetermined coefficient of friction according to the detection requirements to simulate the wear resistance of printed products in different environments, and multiple groups of detection values can be obtained without passing through multiple devices, which improves the practicability of the device and reduces the detection cost of wear resistance detection at the same time.
[0053] In an example, the reset member 333 is implemented as a spring.
[0054] The present invention also provides a working method of the printing product ink wear resistance detection device, including the following steps:
[0055] (A) The printed product is laid on the bearing surface 2101 of the bearing member 21 with the printed surface facing away from the bearing surface 2101;
[0056] (B) Select a counterweight 32 of an appropriate weight and install the counterweight 32 on the pressing end portion 311;
[0057] (C) The pressing main body 31 turns along a vertical plane towards the bearing member 21 until the pressing end portion 311 overlaps the printed surface;
[0058] (D) The displacement mechanism 40 drives the bearing member 21 to move along a horizontal plane, and observes the wear condition of the printed surface by fixing the number of friction times or limiting the friction time, so as to judge the wear resistance of the ink.
[0059] Between step (A) and step (C), there is a step (E) included. The pressing member 221 forms the abutting wall 2211 to move away from the bearing member 21 along a vertical plane. The end portion of the printed product passes through the gap between the pressing member 221 and the bearing member 21. Subsequently, the abutting wall 2211 moves close to the bearing member 21 along the vertical plane, and the pressing member 221 fixes the end portion of the printed product.
[0060] Between step (A) and step (C), there is also a step (F) included. Select an abrasive belt with an appropriate friction coefficient to wrap the pressing end portion 311, and assemble the abrasive belt with the pressing end portion 311 through the clamping assembly 33.
[0061] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the above principles, the embodiments of the present invention can have any deformation or modification.
Claims
1. Printing product ink wear resistance testing equipment, characterized in that: The printed product ink wear resistance detection equipment comprises: Equipment body; A loading mechanism, the loading mechanism comprising a loading member, wherein the loading member has a loading surface, and the printed product is laid on the loading surface of the loading member in a manner that the printed surface faces away from the loading surface; A driving mechanism, the driving mechanism is installed on the device body, and the bearing member is drivingly connected to the driving mechanism, and the driving mechanism is configured to drive the bearing member to reciprocate along a horizontal plane; At least one pressing mechanism, the pressing mechanism comprising a pressing body and a counterweight, the pressing body forming a pressing end, the pressing body being pivotally mounted on the device body away from an end forming the pressing end, wherein the pressing end can be turned toward or away from the bearing surface along a vertical plane, the counterweight is detachably mounted on the pressing end, and a grinding belt can be mounted on the side of the pressing end abutting against the bearing surface.
2. The printing ink wear resistance testing device according to claim 1 is characterized in that: The pressing body forms an assembly structure, the counterweight forms a connection structure, either the assembly structure or the connection structure is implemented as a bolt, and the other is implemented as a threaded hole, and the assembly structure is threadedly connected to the connection structure.
3. The printing ink wear resistance testing device according to claim 2 is characterized in that: The device body forms a guide structure, the bearing member is slidably mounted on the guide structure, and the guide structure is used to limit the moving direction of the bearing member.
4. The printing ink wear resistance testing device according to claim 3 is characterized in that: The printed product ink wear resistance detection device is provided with a plurality of the pressing mechanisms, and the plurality of pressing mechanisms are arranged above the carrier at intervals.
5. The printing ink wear resistance testing device according to claim 4 is characterized in that: The bearing surface extends in a curved shape along the moving direction of the bearing member driven by the driving mechanism, and in the process of the driving mechanism driving the bearing member to move in the horizontal direction, the pressing mechanism rotates according to the position corresponding to the bearing surface, and the grinding belt installed at the pressing end remains in contact with the printing surface.
6. The printing ink wear resistance testing device according to claim 5, characterized in that: The loading mechanism also includes at least one pair of pressing components, and the two pressing components of a pair are symmetrically installed on opposite sides of the carrier. Each of the pressing components includes a pressing piece and a belt-shifting member. The pressing piece forms an abutment wall, and the belt-shifting member is installed on the carrier. The pressing piece is installed on the belt-shifting member, and the pressing piece is located on the upper surface of the carrier. The belt-shifting member can drive the pressing piece to move so that the abutment wall is close to or away from the carrier in the vertical plane.
7. The printing product ink wear resistance detection device according to claim 6, characterized in that: The pressing piece has a pressing protrusion, and the abutment wall is formed on the pressing protrusion. The belt shifting member includes a belt shaft and a state maintaining piece. The state maintaining piece is sleeved on the belt shaft in a manner that allows elastic deformation and is arranged between the supporting member and the pressing piece. The belt shaft is pivotally mounted on the supporting member, and the axial direction of the belt shaft extends in a horizontal direction. The pressing piece is fixedly mounted on the belt shaft, and the belt shaft can drive the pressing piece to rotate in the same direction. The state maintaining piece drives the pressing protrusion to maintain abutment with the supporting member through the belt shaft.
8. The printing ink wear resistance testing device according to claim 7, characterized in that: The belt moving member further comprises a hand piece, and the hand piece is fixedly mounted on an end portion of the belt shaft away from the pressing member.
9. The printing ink wear resistance testing device according to claim 7 or 8, characterized in that: The object-carrying mechanism is provided with a plurality of pairs of the pressing and fixing components, and the plurality of pairs of the pressing and fixing components are distributed at intervals.
10. The printing product ink wear resistance detection device according to claim 9, characterized in that: Each of the pressing mechanisms also includes a clamping assembly, which is detachably mounted on the pressing end portion, and the clamping assembly includes a fixed frame, a movable part and a reset part, and the movable part includes a sliding portion and a connecting portion, and the sliding portion is slidably mounted on the fixed frame, and the sliding portion and the fixed frame together form a clamping space with adjustable size, and the connecting portion is connected to the sliding portion and passes through the fixed frame, wherein the portion of the connecting portion extending out of the fixed frame is provided for the inspector to apply force and squeeze, and the reset part is arranged to be installed between the fixed frame and the movable part in a manner that can undergo elastic deformation, and when the connecting portion drives the sliding portion to move in a direction of extending into the fixed frame, the reset part undergoes elastic deformation and has a tendency to drive the movable part to move in a direction of extending out of the fixed frame.