Environment management equipment for software development and testing
By setting the first and second harness mechanisms in the environment management equipment for software development and testing, the problem of loose connection ports after long-term insertion and removal of data lines is solved, and the stability and anti-falling effect of data lines are achieved.
Patent Information
- Application Number
- CN202510343392.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2025-07-22
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing software development and testing devices, the data cable between the computer and the management device may easily cause the connection port to be loose after a long period of plugging and unplugging, affecting the stability of the data cable connection.
An environmental management device for software development and testing is designed, including a first harness mechanism and a second harness mechanism. The first harness mechanism is used to fix the head end of the data line, and the second harness mechanism drives the negative pressure mechanism to bond the data line connection end to prevent falling off.
Effectively prevent the data line connection end from falling off, improve the stability and reliability of the data line connection, and ensure the smooth progress of the test process.
Smart Images

Figure CN120353304A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field related to software development testing, and specifically to an environmental management device for software development testing. Background Art
[0002] Software testing is to use testing tools to conduct functional and performance tests on products according to the test plan and process. Even different testing tools are written as needed, the test system is designed and maintained, and the possible problems of the test plan are analyzed and evaluated. In this process, an environmental management device is needed for auxiliary operations.
[0003] During the use of existing software testing devices, the device needs to be connected to a computer through different types of data cables for testing. However, after the computer is connected to the testing device by wire, these data cables are usually directly exposed. When someone passes by, these data cables are often accidentally touched, resulting in the failure of the wired connection and affecting the testing of computer software. To solve the above defects, reference can be made to a testing device with a firm connection for computer software development disclosed in the prior art (Chinese Patent with Application No. CN201911180195.1 and Publication Date of March 24, 2020). This testing device facilitates the placement of the computer through a support mechanism and makes the connection part between the computer and the host in a closed protection environment to avoid being disturbed and affecting software testing. Moreover, through the testing mechanism, the wired data connection between the computer and the host can be facilitated to avoid the phenomenon of falling off; reference can also be made to a software development trial testing device disclosed in the prior art (Chinese Patent with Application No. CN202021051568.3 and Publication Date of December 22, 2020). This testing device fixes the distance between the ribbed hole plate and the first rod through the buckle of the positioning post and the Y-shaped block, and uses a transmission structure to make the fan blow to cool the testing machine. This device allows the distance between the ribbed hole plate and the first rod to be adjusted arbitrarily, so that the testing machine can change different working heights during operation, and thus it is also convenient to store the data cables; at the same time, reference can also be made to a testing device for computer software development disclosed in the prior art (Chinese Patent with Application No. CN202221541031.4 and Publication Date of November 29, 2022). This testing device is provided with a bracket on the shielding baffle, a rotating handle and a cam on the bracket, and a side connection buckle block on the machine body. When the shielding baffle is buckled into the groove, the cam is rotated by the rotating handle, so that the head of the cam tightly fits against the end face of the side connection buckle block. By the cam pressing the bracket in the reverse direction, the shielding baffle is tightly pressed against the sealing rubber pad inward, so as to achieve the purpose of improving the sealing performance of the shielding baffle for the interface groove.
[0004] Although the above device also solves the processing of data cables, there are still certain deficiencies in use. When connecting the data cable between the computer and the management device, after long-term plugging and unplugging, the connection port may become loose, and the connection stability of the data cable may deteriorate.
[0005] Therefore, we propose an environment management device for software development testing to solve the problems raised above. Summary of the Invention
[0006] The purpose of the present invention is to provide an environment management device for software development testing to solve the problem that when connecting the data cable between the computer and the management device in the current market, after long-term plugging and unplugging, the connection port may become loose, and the connection stability of the data cable may deteriorate, as proposed in the above background technology.
[0007] To achieve the above purpose, the present invention provides the following technical solution: An environment management device for software development testing, including a moving base placed on the ground. A top position of the moving base is fixedly installed with an environment management box body, and a display component is connected to a top position of the environment management box body. A connection port is opened on one side of the environment management box body, and the connection port is connected to a connection end of a computer through a data cable. A placement board is movably arranged on a surface of the moving base. A computer is placed inside one side of the placement board. A rear side position of the placement board is rotatably arranged at a back position of the moving base. A first wire bundling mechanism is arranged at a rear side of the placement board, and the first wire bundling mechanism acts on a head end position of the data cable. An operation of the first wire bundling mechanism drives a second wire bundling mechanism to operate, and the second wire bundling mechanism acts on a tail end position of the data cable. A negative pressure mechanism can also be arranged on one side of the second wire bundling mechanism to cause the connection end of the data cable inserted inside the connection port to fall off.
[0008] Preferably, a second chute is opened at a bottom position of the placement board. A telescopic support rod is arranged below the placement board. First chutes are opened at both side positions on a surface of the moving base. A plurality of groups of locking grooves are opened inside the second chute.
[0009] Preferably, a rotation angle of the placement board is from 0 to 120 degrees. Sliders are rotatably connected to upper and lower ends of the telescopic support rod. The upper and lower two groups of sliders are respectively slidably arranged inside the second chute and the first chute. Additionally, the upper slider is locked inside the locking groove through a locking bolt.
[0010] Preferably, a rotating block is rotatably arranged at one side position of the placing plate. One end of the rotating block is fixed to the end of a bidirectional threaded rod. The bidirectional threaded rod is rotatably arranged at the inner wall position of the placing plate. The outer side of the bidirectional threaded rod is arranged in a limiting groove opened inside the placing plate. The outer sides of both ends of the bidirectional threaded rod are threadedly connected to the outside of a limiting block. One end of the bidirectional threaded rod far from the rotating block is connected to another group of bidirectional threaded rods through a transmission component.
[0011] Preferably, the first wire bundling mechanism includes a limiting member arranged at one side of the placing plate. The limiting member is composed of a fixed block and a moving block. One end of the fixed block is fixed inside the placing plate. One side of the moving block is slidably arranged inside the placing plate. A piston block is fixed to the end of the moving block. The piston block is connected to a groove inside the placing plate through a return spring. The groove opened inside the placing plate is connected to the second wire bundling mechanism through an air delivery hose.
[0012] Preferably, the outer wall of the piston block fits against the inner wall of the groove inside the placing plate. The moving block and the groove inside the placing plate form an elastic sliding structure through the return spring.
[0013] Preferably, the second wire bundling mechanism includes a wire bundling groove opened at a position below the connection port of the environmental management box body. A moving wire bundle is slidably arranged at one side position of the wire bundling groove. A fixed wire bundle is fixed at the other side position of the wire bundling groove. A piston rod is also fixed to one end of the moving wire bundle. A connecting spring is fixed to the outer side of the piston rod. The outer side of the connecting spring is fixed to the inner wall of the environmental management box body. An air delivery hose is communicated with one side of the environmental management box body.
[0014] Preferably, the air delivery hose is on one side of the piston rod. The piston rod forms a sliding structure with the inside of the environmental management box body through the gas conveyed by the air delivery hose. The moving wire bundle forms a sliding structure with the wire bundling groove through the piston rod.
[0015] Preferably, the negative pressure mechanism includes a connecting rod fixed to one side position of the piston rod. The outer side of the connecting rod is fixed to the inner side of a moving piston disc. One side of the moving piston disc is slidably arranged inside a sealing groove. The sealing groove is opened inside the environmental management box body. One end of the moving piston disc is connected to one side of an air delivery pipe. One end of the air delivery pipe is connected to a negative pressure disc. The outer side of the negative pressure disc fits against the outside of the data line connection end.
[0016] Preferably, the negative pressure disc is arranged at the four corners around the connection port. The outer side of the moving piston disc fits against the inner wall of the sealing groove. The moving piston disc forms a negative pressure structure with the negative pressure disc through the sealing groove.
[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The software development test environment management device is provided with a first wire bundling mechanism and a second wire bundling mechanism. By operating the first wire bundling mechanism, the head position of the data cable can be fixed, and the operation of the first wire bundling mechanism can drive the second wire bundling mechanism to operate. The second wire bundling mechanism can constrain the data cable, and in addition, the second wire bundling mechanism can drive the negative pressure mechanism to fit the connection end of the data cable to prevent it from falling off. The specific content is as follows;
[0018] 1. A placement plate is provided. Through the rotating block provided on one side of the placement plate, the limiting block threadedly connected to the outer side of the bidirectional threaded rod can slide inside the limiting groove, and the outer edge of the computer can be limited by the limiting block, so as to facilitate subsequent testing. In addition, through the setting of the telescopic support rod, the angle of the placement plate can be adjusted through the cooperation of the telescopic support rod, the locking groove and the locking bolt.
[0019] 2. A limiting member is provided. Through the setting of the limiting member, the movement of the moving block and the piston block can be realized, and the cooperation of the piston block and the moving block can be realized, so as to limit the head end of the data cable. In addition, one side of the piston block can convey gas, and the gas can be conveyed to one side of the piston rod, so that the piston rod can drive the moving wire bundle to move. At this time, the cooperation between the moving wire bundle and the fixed wire bundle can limit the tail end of the data cable.
[0020] 3. A piston rod is provided. One side of the piston rod can drive the connecting rod to move, so that the connecting rod can drive the moving piston disk to slide inside the sealing groove. Through the setting of the air pipe inside the sealing groove, the air pipe and the negative pressure disk act on the connection end of the data cable, so as to prevent the connection end of the data cable from falling off. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is the front view structure schematic diagram of the present invention;
[0022] Figure 2 is the side view structure schematic diagram of the present invention;
[0023] Figure 3 is the bottom view structure schematic diagram of the placement plate of the present invention;
[0024] Figure 4 is the present invention Figure 2 The enlarged structure schematic diagram of part A in;
[0025] Figure 5 is the partial structure schematic diagram of the placement plate of the present invention;
[0026] Figure 6 is the front view structure schematic diagram of the limiting member of the present invention;
[0027] Figure 7 This is the front view structural schematic diagram of the moving beam line of the present invention;
[0028] Figure 8 For the present invention Figure 7 The enlarged structural schematic diagram at position B in it;
[0029] Figure 9 This is the side view structural schematic diagram of the connection port of the present invention.
[0030] In the figure: 1. Moving seat; 2. Environmental management box body; 3. Display component; 4. Connection port; 5. Placing plate; 6. Telescopic support rod; 7. First chute; 8. Second chute; 9. Locking groove; 10. Locking bolt; 11. Rotating block; 12. Bidirectional threaded rod; 121. Transmission component; 13. Limiting groove; 14. Limiting block; 15. Limiting piece; 151. Fixed block; 152. Moving block; 153. Piston block; 154. Return spring; 16. Air delivery hose; 17. Piston rod; 18. Moving beam line; 181. Fixed beam line; 19. Connection spring; 20. Beam line groove; 21. Connecting rod; 22. Moving piston disc; 23. Sealing groove; 24. Air delivery pipe; 25. Negative pressure disc. Specific embodiments
[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0032] Please refer to Figures 1 - 9 , the present invention provides the following technical solutions:
[0033] Embodiment 1
[0034] In order to facilitate the placement of the computer and facilitate the subsequent test processing, reference can be made to the attached Figure 1 - attached Figure 4, including a moving base 1 placed on the ground. At the top position of the moving base 1, an environmental management box 2 is fixedly installed, and a display component 3 is connected to the top position of the environmental management box 2. On one side of the environmental management box 2, a connection port 4 is provided, and the connection port 4 is connected to the connection end of a computer through a data cable; on the surface of the moving base 1, a placement board 5 is movably arranged. Inside one side of the placement board 5, a computer is placed. At the rear side position of the placement board 5, it is rotatably arranged at the back position of the moving base 1. At the bottom position of the placement board 5, a second chute 8 is provided. Below the placement board 5, a telescopic support rod 6 is arranged. On both sides of the surface of the moving base 1, first chutes 7 are provided. Inside the second chute 8, a number of locking grooves 9 are provided; the rotation angle of the placement board 5 is from 0 to 120 degrees. At the upper and lower ends of the telescopic support rod 6, sliders are rotatably connected respectively. The upper and lower groups of sliders are respectively slidably arranged inside the second chute 8 and the first chute 7. Additionally, the upper slider is locked inside the locking groove 9 through a locking bolt 10; at one side position of the placement board 5, a rotating block 11 is rotatably arranged. At one end position of the rotating block 11, it is fixed to the end of a bidirectional threaded rod 12. The bidirectional threaded rod 12 is rotatably arranged inside the inner wall of the placement board 5. The outside of the bidirectional threaded rod 12 is arranged inside a limiting groove 13 opened inside the placement board 5. The outer sides of both ends of the bidirectional threaded rod 12 are threadedly connected to the outside of a limiting block 14. At the position of the end of the bidirectional threaded rod 12 away from the rotating block 11, it is connected to another bidirectional threaded rod 12 through a transmission component 121.
[0035] First, the computer needs to be placed. Place the computer on the top of the placement board 5. Subsequently, by rotating the rotating block 11, the end of the rotating block 11 can drive the bidirectional threaded rod 12 to rotate inside the limiting groove 13. At this time, during the rotation of the bidirectional threaded rod 12, it will also drive another bidirectional threaded rod 12 to rotate inside the limiting groove 13 through the transmission component 121. During the rotation of the bidirectional threaded rod 12, it can drive the threadedly connected limiting block 14 to move, so that the outside of the limiting block 14 will be limited to the outside of the computer, thereby achieving the limiting treatment of the computer. Additionally, by loosening the locking bolt 10, the outer end of the locking bolt 10 will disengage from the inside of the locking groove 9. Subsequently, by lifting the placement board 5, the placement board 5 will rotate at an angle on one side of the moving base 1. At this time, the telescopic support rod 6 arranged at the bottom of the placement board 5 will move. The sliders arranged at the upper and lower ends of the telescopic support rod 6 will slide inside the first chute 7 and the second chute 8. At this time, with the cooperation of the telescopic support rod 6, the angle of the placement board 5 can be stably adjusted. Subsequently, the locking groove 9 is locked through the locking bolt 10, which is convenient for the staff to conduct test processing.
[0036] Embodiment 2
[0037] To prevent the staff from accidentally touching the data cable, reference can be made to Attachment Figure 1 、AttachmentFigure 2 and attached Figure 5 -Attached Figure 7 , a first wire harness mechanism is arranged on the rear side of the placement plate 5, the first wire harness mechanism acts on the head end position of the data line, the operation of the first wire harness mechanism drives the second wire harness mechanism to operate, and the second wire harness mechanism acts on the tail end position of the data line; the first wire harness mechanism includes a limiter 15 arranged on one side of the placement plate 5, the limiter 15 is composed of a fixed block 151 and a moving block 152, one end of the fixed block 151 is fixed inside the placement plate 5, one side of the moving block 152 is slidably arranged inside the placement plate 5, a piston block 153 is fixed at the end position of the moving block 152, the piston block 153 is connected to the groove inside the placement plate 5 through a return spring 154, and the groove opened inside the placement plate 5 is connected to the second wire harness mechanism through a gas hose 16; the outer wall of the piston block 153 is attached to the inner wall of the groove inside the placement plate 5, and the moving block 152 ... An elastic sliding structure is formed between the over-reset spring 154 and the groove inside the placement plate 5; the second wiring harness mechanism includes a wiring harness groove 20 opened at a position below the connection port 4 of the environmental management box 2, and a movable wiring harness line 18 is slidably arranged on one side of the wiring harness groove 20, and a fixed wiring harness line 181 is fixed on the other side of the wiring harness groove 20, and a piston rod 17 is also fixed at one end of the movable wiring harness line 18, and a connecting spring 19 is fixed to the outside of the piston rod 17, and the outside of the connecting spring 19 is fixed to the inner wall of the environmental management box 2, and a gas hose 16 is connected to one side of the environmental management box 2; the gas hose 16 is on one side of the piston rod 17, and a sliding structure is formed between the gas transported by the piston rod 17 through the gas hose 16 and the inside of the environmental management box 2, and the movable wiring harness line 18 forms a sliding structure between the piston rod 17 and the wiring harness groove 20.
[0038] In addition, after the computer is connected to the connection port 4 through the data cable, the redundant data cable is constrained. Through human intervention, the tail end of the data cable can be embedded in the cable slit 20, and the head end of the data cable is set on one side of the placement plate 5. At this time, by toggling the moving block 152 of the limiter 15, the moving block 152 will slide in the groove inside the placement plate 5, and the head end of the data cable is placed on the inner side of the moving block 152 and the fixed block 151, so that the head end of the data cable can be bundled. When the moving block 152 moves, The moving block 152 slides through the piston block 153 and the inner part of the return spring 154, so that the gas inside the placement plate 5 is transported through the gas hose 16. At this time, the other end of the gas hose 16 is connected to one side of the piston rod 17. At this time, the piston rod 17 will move through the gas. At this time, the piston rod 17 will drive the moving beam line 18 to move, so that the setting of the moving beam line 18 and the fixed beam line 181 can limit the tail end of the data line, and the setting of the first beam mechanism and the second beam mechanism can realize the constraint processing of the data line.
[0039] Embodiment III
[0040] In order to solve the problem that when connecting the data cable between a computer and a management device in the current market, after long-term plugging and unplugging, the connection port will become loose, and there may be a problem that the connection stability of the data cable becomes poor. Reference can be made to Appendix Figure 1 , Appendix Figure 2 , and Appendix Figure 7 - Appendix Figure 9 . On one side of the second cable bundle mechanism, the phenomenon that the data cable connection end inserted inside the connection port 4 falls off can also be realized through a negative pressure mechanism; the negative pressure mechanism includes a connecting rod 21 fixed at one side position of the piston rod 17. The outside of the connecting rod 21 is fixed inside the moving piston disk 22. One side of the moving piston disk 22 is slidably arranged inside the sealing groove 23. The sealing groove 23 is opened inside the environmental management box body 2. One end position of the moving piston disk 22 is connected to one side of the air delivery pipe 24. One end of the air delivery pipe 24 is connected to the negative pressure disk 25. The outside of the negative pressure disk 25 is attached to the outside of the data cable connection end; the negative pressure disk 25 is arranged at the four corners around the connection port 4, and the outside of the moving piston disk 22 is attached to the inner wall of the sealing groove 23. The moving piston disk 22 and the negative pressure disk 25 form a negative pressure structure through the sealing groove 23.
[0041] When the second cable bundle mechanism is operating, at this time, when the piston rod 17 moves, it will also drive the connecting rod 21 to move. At this time, the connecting rod 21 will drive the moving piston disk 22 to slide. Since the outside of the moving piston disk 22 is slidably attached inside the sealing groove 23, at this time, through the arrangement of the sealing groove 23 and the air delivery pipe 24 of the moving piston disk 22, the air delivery pipe 24 can perform negative pressure adsorption treatment on the negative pressure disk 25, so that the negative pressure disk 25 can perform adsorption and fixation treatment on one side of the connection end of the data cable. At this time, the purpose of preventing detachment can be achieved.
[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. An environmental management device for software development testing, including a mobile base (1) placed on the ground. At the top position of the mobile base (1), an environmental management box body (2) is fixedly installed, and at the top position of the environmental management box body (2), a display component (3) is connected. At one side position of the environmental management box body (2), a connection port (4) is opened, and the connection port (4) is connected to the connection end of a computer through a data cable. It is characterized in that: On the surface position of the mobile base (1), a placement board (5) is movably arranged. Inside one side of the placement board (5), a computer is placed. At the rear side position of the placement board (5), it is rotatably arranged at the back position of the mobile base (1). At the rear side of the placement board (5), a first wire bundling mechanism is arranged, and the first wire bundling mechanism acts on the head end position of the data cable. The operation of the first wire bundling mechanism drives the second wire bundling mechanism to operate, and the second wire bundling mechanism acts on the tail end position of the data cable. On one side of the second wire bundling mechanism, it can also cause the connection end of the data cable inserted inside the connection port (4) to fall off through a negative pressure mechanism.
2. The software development test environment management device according to claim 1, characterized in that: At the bottom position of the placement board (5), a second chute (8) is opened. Below the placement board (5), a telescopic support rod (6) is arranged. On both side positions of the surface of the mobile base (1), first chutes (7) are opened. Inside the second chute (8), a number of locking grooves (9) are opened.
3. The software development test environment management device according to claim 2, characterized in that: The rotation angle of the placement board (5) is from 0 to 120 degrees. At the upper and lower end positions of the telescopic support rod (6), sliders are rotatably connected respectively. The upper and lower two groups of sliders are respectively slidably arranged inside the second chute (8) and the first chute (7). In addition, the upper end slider is locked inside the locking groove (9) through a locking bolt (10).
4. An environment management device for software development testing according to claim 1, characterized in that: At one side position of the placement board (5), a rotating block (11) is rotatably arranged. At one end position of the rotating block (11), it is fixed to the end of a bidirectional threaded rod (12). The bidirectional threaded rod (12) is rotatably arranged inside the inner wall of the placement board (5). The outer side of the bidirectional threaded rod (12) is arranged inside a limit groove (13) opened inside the placement board (5). The two ends of the outer side of the bidirectional threaded rod (12) are threadedly connected to the outer side of a limit block (14). At the position of the end of the bidirectional threaded rod (12) far from the rotating block (11), it is connected to another bidirectional threaded rod (12) through a transmission component (121).
5. An environment management device for software development testing according to claim 1, characterized in that: The first wire bundling mechanism includes a limiting member (15) arranged on one side of the placement board (5). The limiting member (15) is composed of a fixed block (151) and a moving block (152). At one end position of the fixed block (151), it is fixed inside the placement board (5). On one side of the moving block (152), it is slidably arranged inside the placement board (5). At the end position of the moving block (152), a piston block (153) is fixed. The piston block (153) is connected to the groove inside the placement board (5) through a return spring (154). The groove opened inside the placement board (5) is connected to the second wire bundling mechanism through an air delivery hose (16).
6. The software development test environment management device according to claim 5, characterized in that: The outer wall of the piston block (153) fits against the inner wall of the inner groove of the placement plate (5), and an elastic sliding structure is formed between the moving block (152) and the inner groove of the placement plate (5) through a return spring (154).
7. An environment management device for software development testing according to claim 1, characterized in that: The second wire bundling mechanism includes a wire bundling groove (20) opened at a position below the connection port (4) of the environmental management box body (2). A moving wire bundle strip (18) is slidably arranged at one side position of the wire bundling groove (20), and a fixed wire bundle strip (181) is fixed at the other side position of the wire bundling groove (20). A piston rod (17) is also fixed at one end position of the moving wire bundle strip (18). A connecting spring (19) is fixed on the outer side of the piston rod (17), and the outer side of the connecting spring (19) is fixed on the inner wall of the environmental management box body (2). An air delivery hose (16) is communicated with one side position of the environmental management box body (2).
8. An environment management device for software development testing according to claim 7, characterized in that: The air delivery hose (16) is located at one side of the piston rod (17), and a sliding structure is formed between the gas conveyed by the piston rod (17) through the air delivery hose (16) and the interior of the environmental management box body (2). A sliding structure is formed between the moving wire bundle strip (18) and the wire bundling groove (20) through the piston rod (17).
9. An environment management device for software development testing according to claim 1, characterized in that: The negative pressure mechanism includes a connecting rod (21) fixed at one side position of the piston rod (17). The outer side of the connecting rod (21) is fixed inside the moving piston disc (22). One side of the moving piston disc (22) is slidably arranged inside a sealing groove (23). The sealing groove (23) is opened inside the environmental management box body (2). One end position of the moving piston disc (22) is connected to one side of an air delivery pipe (24). One end of the air delivery pipe (24) is connected to a negative pressure disc (25). The outer side of the negative pressure disc (25) fits against the outside of the data line connection end.
10. The software development test environment management device according to claim 9, characterized in that: The negative pressure disc (25) is arranged at the four corners around the connection port (4), and the outer side of the moving piston disc (22) fits against the inner wall of the sealing groove (23). A negative pressure structure is formed between the moving piston disc (22) and the negative pressure disc (25) through the sealing groove (23).
Citation Information
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