Ink-jet printer for automobile wire harness production
By designing a limit and reciprocating mechanism for the inkjet printer used in automotive wiring harness production, the printer's left and right reciprocating movement is realized, solving the problem of low efficiency in existing technologies, improving inkjet printing efficiency and applicability, and ensuring the stability and accuracy of inkjet printing.
Patent Information
- Application Number
- CN202520778971.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-23
AI Technical Summary
Existing inkjet printers used in automotive wiring harness production can only print on one wiring harness at a time, and the printer remains stationary and idle while the wiring harness is moving, resulting in low work efficiency.
A coding machine for automotive wiring harness production was designed. It adopts a limit mechanism and a reciprocating mechanism. The coding machine is driven by a motor to achieve left and right reciprocating movement. It can simultaneously code two wiring harnesses and can adapt to wiring harnesses of different diameters by changing the sliding rings of different diameters.
It improves the working efficiency and flexibility of the inkjet printer, reduces idle time, increases the practicality and applicability of the inkjet printer, and ensures the stability and accuracy of the coding.
Smart Images
Figure CN223821318U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile wire harness processing, and particularly relates to a code spraying machine for automobile wire harness production. BACKGROUND
[0002] The wire harness is a component for connecting a circuit, which is formed by bundling a wire harness after a contact terminal made of copper material is pressed to an electric wire and cable, and an outer plastic insulation body or an additional metal shell is added. The wire harness is widely used in automobiles, household appliances, computers and communication equipment, various electronic instruments and the like. During wire harness production, different models and materials of products need to be distinguished by spraying codes on the outer part of the products for easy identification.
[0003] In the current code spraying process of automobile wire harness, the wire harness is moved by traction transmission, a code spraying machine is fixedly installed above the wire harness, and the wire harness is intermittently sprayed by the code spraying machine in cooperation with the intermittent movement of the wire harness to complete the code spraying work of the wire harness.
[0004] However, the existing code spraying machine for automobile wire harness production can only spray one automobile wire harness at a time. During the movement of the wire harness, the code spraying machine is usually in a static idle state. Although the movement of the wire harness is for adjusting the code spraying position, the intermittent working mode wastes some time in waiting for the movement of the wire harness, which reduces the working efficiency of the code spraying machine and further reduces the practicability of the code spraying machine for automobile wire harness production. UTILITY MODEL CONTENTS
[0005] In view of the above problems of the existing code spraying machine for automobile wire harness production, which can only spray one automobile wire harness at a time and is usually in a static idle state during the movement of the wire harness, although the movement of the wire harness is for adjusting the code spraying position, the intermittent working mode wastes some time in waiting for the movement of the wire harness, which reduces the working efficiency of the code spraying machine and further reduces the practicability of the code spraying machine for automobile wire harness production, the utility model provides a code spraying machine for automobile wire harness production to overcome the above technical problems existing in the prior art.
[0006] To solve the above technical problems, the utility model is realized by the following technical scheme:
[0007] The utility model discloses a kind of code ink-jet printers for automobile wire harness production, including workbench, the upper surface of workbench is fixedly connected with two fixed blocks, the upper end of two fixed blocks is fixedly connected with mounting block, two sets of limiting mechanisms are installed on the workbench, wire harness body is provided on the limiting mechanism, code ink-jet printer body is provided on the mounting block, code work is carried out to the wire harness body by the code ink-jet printer body, the limiting mechanism is used to limit the wire harness body, limiting mechanism can guarantee that the code ink-jet printer body can be accurate to the wire harness body Code work, reciprocating mechanism is provided on the mounting block, reciprocating mechanism drives the code ink-jet printer body left and right reciprocating movement can be carried out to two wire harness bodies Code work.
[0008] Further, the limiting mechanism includes two fixed seats, the fixed seat is fixedly connected to the upper surface of the workbench, the upper side of the fixed seat is provided with a positioning seat, two mounting holes extending out of the lower surface of the positioning seat are formed in the positioning seat.
[0009] Further, two threaded holes are formed in the upper surface of the fixed seat, the positioning seat is fixed on the fixed seat by bolts, a sliding ring is fixedly connected to the upper side of the positioning seat, the sliding ring is in the shape of a ring, the wire harness body slides through the sliding ring on the corresponding front and rear sides.
[0010] Further, the reciprocating mechanism includes a motor, the motor is fixedly connected to the upper surface of the mounting block, an inner cavity is formed in the mounting block, a limiting groove is formed in the lower surface of the mounting block, and the limiting groove is in communication with the inner cavity.
[0011] Further, a connecting sliding rod is fixedly connected between the inner walls of the left and right sides of the limiting groove, a positioning block is slidably sleeved on the outer surface of the connecting sliding rod, the positioning block is slidably connected with the limiting groove, and the code ink-jet printer body is fixedly installed on the lower surface of the positioning block.
[0012] Further, a sliding block is slidably sleeved in the inner cavity, the upper surface of the positioning block extends into the inner cavity through the limiting groove and is fixedly connected with the lower surface of the sliding block, a rotating shaft is fixedly connected to the rotating output shaft of the motor, a sliding groove is formed in the upper surface of the sliding block, the lower end of the rotating shaft rotates and penetrates into the sliding groove, and a pushing block is fixedly connected to the lower end of the rotating shaft.
[0013] Further, the pushing block is in the shape of an elliptic cylinder, the rotating shaft is arranged eccentrically with the pushing block, two first springs are fixedly connected between the right side surface of the sliding block and the right side inner wall of the inner cavity, two second springs are fixedly connected between the left side surface of the sliding block and the left side inner wall of the inner cavity, the outer surface of the pushing block is in contact with the left side inner wall of the sliding groove, and the outer surface of the pushing block is in sliding connection with the left side inner wall of the sliding groove.
[0014] The utility model has the advantages of the following beneficial effects:
[0015] The utility model discloses a start motor can drive the ink-jet printer body to move back and forth, and the ink-jet printer body can stagger to carry out the ink-jet work to two wire harness bodies, can reduce the time of the ink-jet printer static idle, and then reduce the waste of time, and then make the production of automobile wire harness more efficient, more flexible, and then improve the efficiency of the ink-jet printer for automobile wire harness production, increase the practicality of the ink-jet printer for automobile wire harness production.
[0016] The utility model discloses a start motor can drive the ink-jet printer body to move back and forth, and the ink-jet printer body can stagger to carry out the ink-jet work to two wire harness bodies, can reduce the time of the ink-jet printer static idle, and then reduce the waste of time, and then make the production of automobile wire harness more efficient, more flexible, and then improve the efficiency of the ink-jet printer for automobile wire harness production, increase the practicality of the ink-jet printer for automobile wire harness production.
[0017] The utility model discloses a start motor can drive the ink-jet printer body to move back and forth, and the ink-jet printer body can stagger to carry out the ink-jet work to two wire harness bodies, can reduce the time of the ink-jet printer static idle, and then reduce the waste of time, and then make the production of automobile wire harness more efficient, more flexible, and then improve the efficiency of the ink-jet printer for automobile wire harness production, increase the practicality of the ink-jet printer for automobile wire harness production.
[0018] Of course, implementing any product of the utility model does not necessarily need to achieve all the advantages mentioned above at the same time. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be needed to introduce the drawing briefly, and obviously, the drawing in the following description is only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can also be obtained according to these drawings without creating labor.
[0020] Figure 1 It is the overall structure schematic diagram of the utility model;
[0021] Figure 2 It is the overall structure schematic diagram of the utility model; Figure 1 It is the A place amplification of the utility model;
[0022] Figure 3 It is the installation block cross section view of the utility model;
[0023] Figure 4 It is the positioning block structure schematic view of the utility model;
[0024] Figure 5 It is the pushing block structure schematic view of the utility model;
[0025] Figure 6 It is the fixed seat structure schematic view of the utility model.
[0026] In the drawings, the component list represented by each sign is as follows:
[0027] 1, workbench;2, fixed block;3, mounting block;4, motor;5, fixed seat;6, positioning seat;7, wire harness body;8, threaded hole;9, sliding ring;10, inkjet printer body;11, inner cavity;12, limit groove;13, positioning block;14, connecting sliding rod;15, sliding block;16, rotating shaft;17, sliding groove;18, pushing block;19, first spring;20, second spring;21, mounting hole. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model protection.
[0029] In the description of the utility model, it is understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.
[0030] Please refer to Figures 1-6 The utility model discloses a kind of inkjet printers for automobile wire harness production, including workbench 1, the upper surface of workbench 1 is fixedly connected with two fixed blocks 2, the upper end of two fixed blocks 2 is fixedly connected with mounting block 3, two sets of limiting mechanisms are installed on workbench 1, wire harness body 7 is provided on the limiting mechanism, inkjet printer body 10 is provided on mounting block 3, code work is carried out to wire harness body 7 by inkjet printer body 10, the limiting mechanism is used to limit wire harness body 7, limiting mechanism can guarantee that the accuracy of inkjet printer body 10 can code wire harness body 7, reciprocating mechanism is provided on mounting block 3, reciprocating mechanism drives inkjet printer body 10 to reciprocate left and right and can code two wire harness bodies 7.
[0031] In use, the wire harness body 7 is slid through the limiting mechanism, the limiting mechanism can limit the wire harness body 7, so that the wire harness body 7 remains in a straight state to avoid tilting of the wire harness body 7, thereby ensuring the accuracy of the code jet body 10 on the wire harness body 7 code jet position, and the limiting mechanism can be replaced with different sizes to accommodate wire harness bodies 7 of different diameters. The initial position of the code jet body 10 can code the wire harness body 7 on the right side. When the reciprocating mechanism is started, the reciprocating mechanism drives the code jet body 10 to move to the left. When the reciprocating mechanism drives the code jet body 10 to move to the leftmost side, the position of the code jet body 10 is directly above the wire harness body 7 on the left side. At this time, the code jet body 10 can be used to code the wire harness body 7 on the left side. When the code jet body 10 on the left side finishes coding, the reset mechanism drives the code jet body 10 to return to the initial position to code the wire harness body 7 on the right side again. In this way, the code jet body 10 can move left and right to code two wire harness bodies 7.
[0032] In one embodiment, for the upper limiting mechanism, the limiting mechanism includes two fixed seats 5 fixedly connected to the upper surface of the workbench 1, and the upper side of the fixed seat 5 is provided with a positioning seat 6 having two mounting holes 21 extending out of the lower surface thereof.
[0033] The upper surface of the fixed seat 5 is provided with two threaded holes 8, the positioning seat 6 is fixed on the fixed seat 5 by bolts, the upper side of the positioning seat 6 is fixedly connected with a sliding ring 9, the sliding ring 9 is in the shape of a circular ring, and the wire harness body 7 slides through the corresponding front and rear sliding rings 9.
[0034] In this scheme, a plurality of sliding rings 9 with different inner diameters are provided, and the bolts are threadedly connected in the fixed seat 5 to fix the fixed seat 5 and the positioning seat 6. Because the fixed seat 5 and the positioning seat 6 are bolted, rotating the bolt can detach the positioning seat 6 from the fixed seat 5, thereby also completing the disassembly of the sliding ring 9. At this time, the positioning seat 6 with the sliding ring 9 of different inner diameters is installed on the corresponding fixed seat 5 by bolts, thereby completing the replacement of the sliding ring 9 of different diameters. Different sliding rings 9 can be replaced according to the different diameters of the processed automobile wire harness, thereby enabling the code jet machine for automobile wire harness production to code wire harness bodies 7 of different diameters, thereby increasing the practicality and flexibility of the code jet machine for automobile wire harness production, and improving the applicability of the code jet machine for automobile wire harness production.
[0035] In one embodiment, for the upper reciprocating mechanism, the reciprocating mechanism comprises a motor 4 fixedly connected to the upper surface of the mounting block 3, the mounting block 3 is provided with an inner cavity 11, and the lower surface of the mounting block 3 is provided with a limiting groove 12 communicating with the inner cavity 11.
[0036] The left and right inner walls of the limiting groove 12 are fixedly connected with a connecting slide rod 14, the outer surface of the connecting slide rod 14 is slidably sleeved with a positioning block 13, the positioning block 13 is slidably connected with the limiting groove 12, and the inkjet printer body 10 is fixedly installed on the lower surface of the positioning block 13.
[0037] The inner cavity 11 is slidably sleeved with a sliding block 15, the upper surface of the positioning block 13 extends into the inner cavity 11 through the limiting groove 12 and is fixedly connected with the lower surface of the sliding block 15, the rotating output shaft of the motor 4 is fixedly connected with a rotating shaft 16, the upper surface of the sliding block 15 is provided with a sliding groove 17, the lower end of the rotating shaft 16 is rotatably penetrated into the sliding groove 17, and the lower end of the rotating shaft 16 is fixedly connected with a pushing block 18.
[0038] The pushing block 18 is in the shape of an elliptical cylinder, the rotating shaft 16 and the pushing block 18 are eccentrically arranged, two first springs 19 are fixedly connected between the right surface of the sliding block 15 and the right inner wall of the inner cavity 11, two second springs 20 are fixedly connected between the left surface of the sliding block 15 and the left inner wall of the inner cavity 11, the outer surface of the pushing block 18 is in contact with the left inner wall of the sliding groove 17, and the outer surface of the pushing block 18 is slidably connected with the left inner wall of the sliding groove 17.
[0039] In addition, in specific application, the outer surface of the wire harness body 7 can be inkjet printed by starting the inkjet printer body 10. In the initial state, because the first spring 19 and the second spring 20 have strong elastic force, the first spring 19 and the second spring 20 support and position the sliding block 15, so that the initial position of the inkjet printer body 10 can perform inkjet printing on the wire harness body 7 located on the right side. At this time, the outer surface of the side of the pushing block 18 close to the rotating shaft 16 is in contact with the left inner wall of the sliding groove 17.
[0040] When the motor 4 is started, the motor 4 drives the rotating shaft 16 to rotate, the rotating shaft 16 drives the push block 18 to rotate around the rotating shaft 16 as the center, the outer surface of the push block 18 is in sliding connection with the left inner wall of the sliding groove 17 during the rotation of the push block 18, in this process, the push block 18 pushes the sliding block 15 through the sliding groove 17, so that the sliding block 15 moves to the left, and in turn synchronously drives the positioning block 13 and the ink-jet printer body 10 to move to the left, in this process, the second spring 20 is compressed to make the second spring 20 deform by compression, and the first spring 19 is stretched to make the first spring 19 deform by stretching, when the push block 18 rotates by one hundred and eighty degrees, at this time, the outer surface of the side of the push block 18 away from the rotating shaft 16 is in contact with the left inner wall of the sliding groove 17, at this time, the ink-jet printer body 10 moves to the right above the wire harness body 7, at this time, the motor 4 stops rotating, so that the ink-jet printer body 10 can be used to perform the ink-jet work on the wire harness body 7 located on the right, synchronously, during the ink-jet work on the wire harness body 7 located on the right, the wire harness body 7 located on the left can be adjusted to move forward to adjust the position of the wire harness, so as to adjust the ink-jet position next time, thereby reducing the time waste of the idle state of the ink-jet printer, and the production of the automobile wire harness is more efficient and flexible, thereby improving the efficiency of the ink-jet printer for automobile wire harness production and increasing the practicability of the ink-jet printer for automobile wire harness production.
[0041] In the scheme, the motor 4 is a medium-low speed motor.
[0042] In the scheme, the positioning block 13 is in sliding connection with the connecting slide rod 14 to support and position the positioning block 13, so that the positioning block 13 is prevented from shaking up and down, and the stability of the left and right movement of the positioning block 13 is ensured, thereby ensuring the stability and accuracy of the ink-jet work of the ink-jet printer body 10.
[0043] According to the above technical scheme of the utility model, through specific application, the outer surface of the wire harness body 7 can be ink-jet worked by starting the ink-jet printer body 10, in the initial state, because the first spring 19 and the second spring 20 have strong elasticity, the first spring 19 and the second spring 20 support and position the sliding block 15, so that the initial position of the ink-jet printer body 10 can perform the ink-jet work on the wire harness body 7 located on the right, at this time, the outer surface of the side of the push block 18 close to the rotating shaft 16 is in contact with the left inner wall of the sliding groove 17;
[0044] When the motor 4 is started, the motor 4 drives the rotating shaft 16 to rotate, the rotating shaft 16 drives the push block 18 to rotate around the rotating shaft 16, and the outer surface of the push block 18 is in sliding connection with the left inner wall of the sliding groove 17 during the rotation of the push block 18. During this process, the push block 18 pushes the sliding block 15 through the sliding groove 17, so that the sliding block 15 moves to the left, and in turn synchronously drives the positioning block 13 and the inkjet printer body 10 to move to the left. During this process, the second spring 20 is compressed to cause compression deformation of the second spring 20, and the first spring 19 is stretched to cause tensile deformation of the first spring 19. When the push block 18 rotates by one hundred and eighty degrees, the outer surface of the side of the push block 18 away from the rotating shaft 16 is in contact with the left inner wall of the sliding groove 17 at this time, and the inkjet printer body 10 moves to the right above the wire harness body 7 at this time. At this time, the motor 4 stops rotating, so that the inkjet printer body 10 can be used to perform inkjet work on the wire harness body 7 located on the right. Synchronously, during the inkjet work on the wire harness body 7 on the right, the wire harness body 7 on the left can be adjusted to move forward to adjust the position of the wire harness, so as to adjust the inkjet position next time, thereby reducing the idle time of the inkjet printer, reducing the waste of time, and being more efficient. According to the same principle, when the motor 4 is started again to drive the push block 18 to rotate, the first spring 19 and the second spring 20 drive the sliding block 15 to move to the right to drive the inkjet printer body 10 and the positioning block 13 to reset, and in turn the motor 4 can drive the inkjet printer body 10 to move back and forth, so that the inkjet printer body 10 can staggeringly perform inkjet work on the two wire harness bodies 7, thereby reducing the waste of time. In the present scheme, a plurality of sliding rings 9 with different inner diameters are provided, and the bolts are threadedly connected in the fixed seat 5 through the mounting holes 21 to fix the fixed seat 5 and the positioning seat 6. Because the fixed seat 5 and the positioning seat 6 are connected by bolts, the positioning seat 6 can be disassembled from the fixed seat 5 by rotating the bolt, thereby completing the disassembly of the sliding ring 9. At this time, the positioning seat 6 with the sliding ring 9 with different inner diameters is installed on the corresponding fixed seat 5 through the bolt, thereby completing the replacement of the sliding ring 9 with different diameters. The different sliding rings 9 can be replaced according to the different diameters of the processed automobile wire harness, so that the inkjet work can be performed on the wire harness bodies 7 with different diameters.
[0045] Through the above technical scheme, 1, the motor 4 can drive the inkjet printer body 10 to move back and forth, so that the inkjet printer body 10 can staggeringly perform inkjet work on the two wire harness bodies 7, thereby reducing the idle time of the inkjet printer, reducing the waste of time, and making the production of automobile wire harness more efficient and flexible, thereby improving the efficiency of the inkjet printer for automobile wire harness production and increasing the practicality of the inkjet printer for automobile wire harness production.
[0046] Different sliding rings 9 can be replaced according to the diameter of the automobile wire harness, and then the code spraying processing can be performed on the wire harness body 7 with different diameters, thereby increasing the practicability and flexibility of the code spraying machine for automobile wire harness production, and improving the applicability of the code spraying machine for automobile wire harness production.
[0047] The positioning block 13 is supported and positioned by the sliding connection of the positioning block 13 and the connecting slide rod 14, so as to avoid the up and down shaking of the positioning block 13, and ensure the stability of the left and right movement of the positioning block 13, thereby ensuring the stability and accuracy of the code spraying work of the code spraying machine body 10.
[0048] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0049] The above disclosed preferred embodiments of the utility model are only used to help explain the utility model. The preferred embodiments do not describe all the details, and the utility model is not limited to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the utility model, so that the skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.
Claims
1. A coding machine for automotive wiring harness production, comprising a workbench (1), characterized in that, Two fixing blocks (2) are fixedly connected to the upper surface of the workbench (1). Mounting blocks (3) are fixedly connected to the upper ends of the two fixing blocks (2). Two sets of limiting mechanisms are installed on the workbench (1). Each limiting mechanism is equipped with a wire harness body (7). The mounting block (3) is equipped with a coding machine body (10). The coding machine body (10) performs coding work on the wire harness body (7). The limiting mechanism is used to limit the wire harness body (7). The limiting mechanism can ensure that the coding machine body (10) can accurately code the wire harness body (7). The mounting block (3) is equipped with a reciprocating mechanism. The reciprocating mechanism drives the coding machine body (10) to move back and forth left and right to perform coding work on the two wire harness bodies (7).
2. The inkjet printer for automotive wiring harness production according to claim 1, characterized in that, The limiting mechanism includes two fixed seats (5), which are fixedly connected to the upper surface of the workbench (1). A positioning seat (6) is provided on the upper side of the fixed seat (5), and two mounting holes (21) extending out of its lower surface are provided on the positioning seat (6).
3. The inkjet printer for automotive wiring harness production according to claim 2, characterized in that, The upper surface of the fixed seat (5) has two threaded holes (8). The positioning seat (6) is fixed to the fixed seat (5) by bolts. A sliding ring (9) is fixedly connected to the upper side of the positioning seat (6). The sliding ring (9) is in the shape of a ring. The wire harness body (7) slides through the sliding ring (9) on the corresponding front and rear sides.
4. The inkjet printer for automotive wiring harness production according to claim 1, characterized in that, The reciprocating mechanism includes a motor (4), which is fixedly connected to the upper surface of the mounting block (3). The mounting block (3) has an inner cavity (11) and a limiting groove (12) on the lower surface of the mounting block (3). The limiting groove (12) communicates with the inside of the inner cavity (11).
5. The inkjet printer for automotive wiring harness production according to claim 4, characterized in that, A connecting slide rod (14) is fixedly connected between the inner walls of the left and right sides of the limiting groove (12). A positioning block (13) is slidably sleeved on the outer surface of the connecting slide rod (14). The positioning block (13) is slidably connected to the limiting groove (12). The inkjet printer body (10) is fixedly installed on the lower surface of the positioning block (13).
6. The inkjet printer for automotive wiring harness production according to claim 5, characterized in that, A sliding block (15) is slidably sleeved inside the inner cavity (11). The upper surface of the positioning block (13) extends into the inner cavity (11) through the limiting groove (12) and is fixedly connected to the lower surface of the sliding block (15). The rotation output shaft of the motor (4) is fixedly connected to a rotating shaft (16). A sliding groove (17) is opened on the upper surface of the sliding block (15). The lower end of the rotating shaft (16) rotates through the sliding groove (17). A push block (18) is fixedly connected to the lower end of the rotating shaft (16).
7. The inkjet printer for automotive wiring harness production according to claim 6, characterized in that, The push block (18) is elliptical cylindrical in shape. The rotating shaft (16) is eccentrically positioned with respect to the push block (18). Two first springs (19) are fixedly connected between the right side surface of the sliding block (15) and the right inner wall of the inner cavity (11). Two second springs (20) are fixedly connected between the left side surface of the sliding block (15) and the left inner wall of the inner cavity (11). The outer surface of the push block (18) contacts the left inner wall of the sliding groove (17). The outer surface of the push block (18) is slidably connected to the left inner wall of the sliding groove (17).