A novel cushioning mechanism and methods of assembling and using the same

Abstract

This invention discloses a novel buffer mechanism and its assembly and usage method, comprising a guide rail, a slider, a connecting rod, a top cover, and a bottom cover. The guide rail and connecting rod are fixedly connected, and the top cover and bottom cover form a housing. The rear end of the slider and the front end of the bottom cover are fixedly connected by bolts. The top cover has an upper inlet hole and a lower inlet hole. A stop screw enters the cavity of the housing through the lower inlet hole. The guide rail and connecting rod enter the cavity of the housing through the upper inlet hole. The slider is sleeved on the outside of the guide rail in the vertical direction. The upper and lower ends of the spring abut against the inner wall of the receiving cavity at the lower end of the connecting rod and the lower inlet hole. The stop screw is screwed into the threaded hole of the receiving cavity through a threaded connection. The housing is fixedly connected to the nozzle. This invention uses a linear guide rail instead of a linear bearing, solving the problems of low precision, weak load-bearing capacity, easy jamming due to uneven load, and complex structure of existing buffer mechanisms, achieving miniaturization of the mechanism and reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing and coding technology, specifically to a novel buffer mechanism and its assembly and usage methods. Background Technology

[0002] During operation, the printhead of an inkjet printing and coding equipment is prone to collision with the products being printed on the production line. Therefore, a buffer mechanism needs to be installed at the printhead to prevent damage to the printhead due to collision.

[0003] Currently, the buffer mechanisms used in inkjet printing and coding equipment on the market mainly adopt linear bearing solutions, which are divided into two types: one is to use two linear bearings side by side to prevent the mechanism from rotating while enabling the mechanism to move; the other is to use one linear bearing in conjunction with a guide column to achieve the effect of movement and anti-rotation.

[0004] The existing linear bearing-type buffer mechanism has the following drawbacks: The structure is complex, and the connecting rod that mates with the bearing requires high machining accuracy and surface smoothness, resulting in high machining costs. The load-bearing capacity is low. Under the same specifications, the load of linear bearings is much smaller than that of linear guides. For example, the load-bearing capacity of LB15 linear bearings is much lower than that of LG15 linear guides. Large clearances, such as those between the linear bearing and other components, can cause irregular wobbling between the printhead and the fixed bracket, resulting in poor precision and directly affecting printing quality. The large size of the structure requires two similar components to ensure reliable movement, resulting in an oversized buffer mechanism. Unable to withstand off-center loads, when the load center deviates from the center of the linear bearing, the bearing is subjected to force on one side, which can easily cause ball wear and mechanism jamming, thus limiting its application scenarios. There is no precise positioning structure between the buffer mechanism and the nozzle; the two are fastened together by the tightening force of screws. There is a large assembly error between the two, and this error cannot be corrected manually. Summary of the Invention

[0005] This invention proposes a novel buffer mechanism and its assembly and usage method. It uses linear guide rails instead of linear bearings, which solves the problems of low precision, weak load-bearing capacity, easy jamming due to uneven load, and complex structure of existing buffer mechanisms. It also achieves miniaturization of the mechanism and reduces production costs.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A novel buffer mechanism includes a linear guide rail assembly, a buffer support assembly, a spring, and a locking screw. The linear guide rail assembly includes a guide rail and a slider. The buffer support assembly includes a connecting rod and a housing consisting of a top cover and a bottom cover. The housing and the front panel of the nozzle are pre-positioned by a pin and pin hole. The housing and the front panel of the nozzle are fixedly connected by bolts. The lower end of the guide rail and the connecting rod are fixedly connected. The rear end of the slider and the front end of the bottom cover are fixedly connected by bolts. The upper and lower ends of the top cover are respectively provided with an upper inlet hole and a lower inlet hole. The locking screw enters the cavity of the housing through the lower inlet hole. The spring, guide rail, and connecting rod enter the cavity of the housing through the upper inlet hole. The spring is sleeved on the locking screw. The upper and lower ends of the spring abut against the receiving cavity at the lower end of the connecting rod and the inner wall of the lower part of the top cover, respectively. The slider is slidably connected and sleeved on the outside of the guide rail in the vertical direction. The upper end of the receiving cavity is provided with a threaded hole. The locking screw is screwed into the threaded hole through a threaded connection. When an external force impacts the guide plate at the bottom of the nozzle, the slider moves upward along the guide rail and compresses the spring. When the external force is removed, the spring resets and drives the slider to move downward in a straight line, causing the nozzle to return to its original position.

[0007] Furthermore, the rear end of the top cover is provided with a top cover positioning post and a top cover positioning hole, and the front end of the bottom cover is provided with a bottom cover positioning post and a bottom cover positioning hole. The top cover positioning post and the bottom cover positioning hole are engaged and inserted, and the bottom cover positioning post and the top cover positioning hole are engaged and inserted, so that the top cover and the bottom cover are pre-positioned.

[0008] Furthermore, the top cover has threaded holes on the left and right sides of its rear end, and the bottom cover has through holes on the left and right sides. The positions of the threaded holes and the through holes correspond to each other, and the top cover and the bottom cover are fixedly connected by screwing connecting screws into the through holes and the threaded holes.

[0009] Furthermore, the slider contains steel balls, and the guide rail and the slider are limited by the sliding engagement of the steel balls.

[0010] Furthermore, the bottom cover has a positioning groove in the middle, and the slider is pre-positioned by embedding itself in the positioning groove.

[0011] Furthermore, the bottom cover has a bottom cover pin hole extending through it from front to back, the pin extends through the bottom cover pin hole from front to back, and the tail of the pin is inserted into the nozzle pin hole of the nozzle front panel.

[0012] Furthermore, the lower part of the connecting rod is provided with a guide rail mounting surface along the tangential direction, the guide rail mounting surface is provided with screw holes, the guide rail is provided with guide rail through holes, and the guide rail and the guide rail mounting surface are fixedly connected by screwing in fixing screws radially into the guide rail through holes and screw holes.

[0013] Furthermore, the guide rail mounting surface is provided with a guide rail limiting protrusion along the axial direction, and the bottom surface of the guide rail is provided with a groove that cooperates with the guide rail limiting protrusion. The guide rail and the guide rail limiting protrusion are pre-positioned by the cooperation of the concave and convex structure.

[0014] The assembly method of the novel buffer mechanism includes the following steps: 1) Securely connect the guide rail to the connecting rod; 2) Embed the slider into the bottom cover, fasten the bottom cover and the slider together to achieve the positioning of the slider, and then insert the pin into the bottom cover pin hole of the bottom cover. 3) Assemble the top cover and bottom cover. First, pre-position the top cover and bottom cover by using a hole-shaft fit, and then fix them together with bolts to complete the shell assembly; 4) The plug screw enters the housing through the lower inlet hole, and the spring enters the housing through the upper inlet hole and is fitted onto the plug screw. The assembled guide rail and connecting rod are inserted into the designated position along the opening of the slider. The plug screw is tightened so that the threaded part of the plug screw is tightly fitted with the connecting rod. 5) Insert the tail of the pin into the nozzle pin hole on the front panel of the nozzle to achieve pre-positioning between the housing and the nozzle. The pin can be press-fitted with the pin hole of the bottom cover and the pin hole of the nozzle, and the pin is pressed into the three pin holes by external equipment. 6) Insert the fastening bolts into the through holes at the four corners of the top cover and bottom cover, and screw the fastening bolts into the threaded holes of the printhead front panel of the inkjet printer to securely connect the housing and the printhead front panel.

[0015] The method of using the novel buffer mechanism includes the following steps: 1) The upper end of the connecting rod is clamped and fixed by an external bracket, and the substrate moves along the specified direction on the production line; 2) When the height of the substrate is higher than the lowest position of the guide plate at the lower end of the nozzle, the substrate presses the guide plate upward, causing the nozzle and housing to move upward in a straight line, and the slider moves upward in a straight line along the guide rail to compress the spring. 3) After the substrate passes through the nozzle, the external force is removed, the spring is released, and the nozzle and housing return to their initial state.

[0016] Compared with the prior art, the present invention has the following advantages: When an external force impacts the printhead, the guide rail moves linearly along the slider and compresses the spring. The impact load is offset by the buffering effect of the spring, preventing the printhead from being damaged by direct collision. After the external force is eliminated, the spring automatically resets and drives the printhead back to its position, ensuring the normal operation of the inkjet printing and coding equipment. The movement and anti-rotation effects can be achieved by using a single set of standard linear guide rail components, eliminating the need for multiple similar parts, simplifying the structure and enabling the miniaturization of the buffer mechanism; The load-bearing capacity of linear guide rail assemblies is much higher than that of linear bearings of the same specifications, which can meet the load requirements of inkjet printing and coding equipment and effectively extend the service life of the buffer mechanism.

[0017] The linear guide assembly has the characteristic of equal load in four directions and can bear a certain off-center load moment. The part of the connecting rod inserted into the top cover provides additional stable support for off-center load conditions, overcoming the limitation of traditional linear bearing buffer mechanism that cannot withstand off-center load. The buffer mechanism and the printhead are positioned by pins, which improves the accuracy between the two, thereby reducing the error of the finished equipment and improving the printing quality. This invention can be applied to both non-handheld inkjet printing equipment and handheld inkjet printing equipment, making it applicable to a wide range of scenarios. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the overall structure of the present invention; Figure 2 This is a diagram of the overall assembly structure of the present invention; Figure 3 This is a structural diagram of the top cover of the present invention; Figure 4 This is a structural diagram of the bottom cover of the present invention; Figure 5 This is a structural diagram of the connecting rod of the present invention; Figure 6 This is a disassembled structural diagram of the guide rail and slider of the present invention; Figure 7 This is a structural diagram of the combined guide rail and slider of the present invention; Figure 8 This is a structural diagram of the plug screw of the present invention; Figure 9 This is a disassembled structural diagram of the slider and bottom cover of the present invention; Figure 10 This is a structural diagram of the combined slider and bottom cover of the present invention; Figure 11 This is a disassembled structural diagram of the top cover and bottom cover of the present invention; Figure 12 This is a disassembled structural diagram of the present invention; Figure 13 This is a disassembled structural diagram of the guide rail and connecting rod of the present invention; Figure 14 This is a schematic diagram of the assembly of the guide rail and slider of the present invention; Figure 15 This is a schematic diagram of the assembly of the invention and the nozzle; Figure 16 This is a schematic diagram illustrating an application scenario of the present invention; Figure 17 This is a schematic diagram of the initial state of the present invention; Figure 18This is a schematic diagram of the state of the spring during compression according to the present invention.

[0019] Figure Labels 1. Guide rail, 2. Slider, 3. Connecting rod, 4. Top cover, 5. Bottom cover, 6. Spring 7. Plug screw, 8. Connecting screw, 9. Fixing screw, 10. Fastening bolt. 11. Nozzle, 12. Guide plate, 13. Substrate, 14. Pin, 15. Nozzle pin hole 101 guide rail through hole, 201 steel ball, 301 Receiving cavity, 302 Threaded hole, 303 Guide rail mounting surface, 304 Screw hole. 305 guide rail limiting convex strip, 401 Lower inlet hole, 402 Upper inlet hole, 403 Top cover positioning post, 404 Top cover positioning hole, 405 Top cover threaded hole, 406 Top cover pin hole, 501 Positioning groove, 502 Bottom cover positioning post, 503 Bottom cover positioning hole 504 bottom cover through hole, 505 bottom cover pin hole. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This embodiment proposes a novel buffer mechanism, such as... Figure 1 and Figure 2 As shown, it includes a linear guide rail assembly, a buffer support assembly, a spring 6 and a stop screw 7. The buffer support assembly includes a connecting rod 3 and a housing consisting of a top cover 4 and a bottom cover 5.

[0022] like Figure 3 and Figure 4 As shown, the rear end of the top cover 4 is provided with a top cover positioning post 403 and a top cover positioning hole 404, and the front end of the bottom cover 5 is provided with a bottom cover positioning post 502 and a bottom cover positioning hole 503. The top cover positioning post 403 and the bottom cover positioning hole 503 are inserted together, and the bottom cover positioning post 502 and the top cover positioning hole 404 are inserted together, so that the top cover 4 and the bottom cover 5 are pre-positioned.

[0023] The top cover 4 has threaded holes 405 on both the left and right sides at its lower end, and the bottom cover 5 has through holes 504 on both the left and right sides. The positions of the threaded holes 405 and the through holes 504 correspond to each other. Figure 11 As shown, the top cover 4 and the bottom cover 5 are fixedly connected by screwing in the connecting screws 8 into the bottom cover through hole 504 and the top cover threaded hole 405.

[0024] The lower end of the top cover 4 is provided with a top cover pin hole 406, which is used to avoid the head of the pin 14. The bottom cover 5 is provided with a bottom cover pin hole 505 through the front and rear. The pin hole 15 passes through the bottom cover pin hole 505 through the front and rear. The tail of the pin 14 is inserted into the nozzle pin hole 15 on the front panel of the nozzle 11.

[0025] like Figure 5 As shown, the front end of the connecting rod 3 is provided with a guide rail mounting surface 303 along the tangential direction, and the guide rail mounting surface 303 is provided with a guide rail limiting protrusion 305 along the axial direction. The bottom surface of the guide rail 1 is provided with a groove that cooperates with the guide rail limiting protrusion 305. The guide rail 1 and the guide rail limiting protrusion 305 are pre-positioned by the cooperation of the concave and convex structure.

[0026] The guide rail mounting surface 303 is provided with screw holes 304, and the guide rail 1 is provided with guide rail through holes 101. The guide rail 1 and the guide rail mounting surface 303 are fixedly connected by radially screwing in fixing screws 9 into the guide rail through holes 101 and screw holes 304.

[0027] like Figure 9 and Figure 10 As shown, the linear guide assembly includes a guide rail 1 and a slider 2. The bottom cover 5 has a positioning groove 501 in the middle. The slider 2 is embedded in the positioning groove 501 for pre-positioning. The rear end of the slider 2 and the front end of the bottom cover 5 are fixedly connected by bolts. The slider 2 is slidably connected and sleeved on the outside of the guide rail 1 in the up and down direction.

[0028] like Figure 6 and Figure 7 As shown, the slider 2 is equipped with a steel ball 201. The guide rail 1 and the slider 2 are limited by the sliding engagement of the steel ball 201. The guide rail 1 can only move in a straight line up and down along the slider 2, and there is no shaking in the engagement.

[0029] like Figure 3 As shown, the top cover 4 has an upper inlet hole 402 and a lower inlet hole 401 at its upper and lower ends, respectively. The plug screw 7 enters the cavity of the housing through the lower inlet hole 401, and the spring 6 enters the cavity of the housing through the upper inlet hole 402 and is fitted onto the plug screw 7.

[0030] See the structure of screw 7. Figure 8 The upper and lower ends of the spring 6 abut against the inner wall of the receiving cavity 301 at the lower end of the connecting rod 3 and the lower part of the top cover 4, respectively. The upper end of the receiving cavity 301 extends to provide a threaded hole 302. The plug screw 7 is screwed into the threaded hole 302 through the threaded connection.

[0031] The assembly of guide rail 1 and connecting rod 3 enters the cavity of the housing through the upper inlet hole 402, such as... Figure 1As shown, the lower section of the connecting rod 3 is inserted into the top cover 4 to form an auxiliary support section X1, which provides stable support for the buffer mechanism to bear the off-center load. The maximum movable distance of the guide rail 1 along the slider 2 is X2, which is the maximum buffer stroke of the buffer mechanism. The maximum movable distance X2 can be adjusted in actual use, and the length of the top cover 4 and the bottom cover 5 in the vertical direction can also be changed according to the needs. The upper end of the spring 6 abuts against the M region of the receiving cavity 301, and the lower end of the spring 6 abuts against the N region of the top cover 4. In the initial state, the spring 6 is in a slightly compressed state.

[0032] like Figures 11-15 As shown, the assembly method in this embodiment is as follows: 1) Secure the guide rail 1 to the guide rail mounting surface 303 of the connecting rod 3 with the fixing screw 9 to ensure a firm and secure connection.

[0033] 2) Insert the slider 2 into the positioning groove 501 of the bottom cover 5, and fasten the bottom cover 5 and the slider 2 together with bolts to achieve the positioning of the slider 2. Then, insert the pin 14 into the bottom cover pin hole 505 of the bottom cover 5. (See below) Figure 11 and Figure 12 .

[0034] 3) Assemble the top cover 4 and the bottom cover 5. Align the top cover positioning hole 404 with the bottom cover positioning post 502 and the top cover positioning post 403 with the bottom cover positioning hole 503 to complete the pre-positioning of the top cover 4 and the bottom cover 5. Finally, fasten the top cover 4 and the bottom cover 5 together with the connecting screws 8 to complete the shell assembly.

[0035] 4) The plug screw 7 enters the housing through the lower inlet hole 401, and the spring 6 enters the housing through the upper inlet hole 402 and is fitted onto the plug screw 7. The assembled guide rail 1 and connecting rod 3 are inserted into the designated position along the opening of the slider 2. The plug screw 7 is tightened so that the threaded part of the plug screw 7 is tightly fitted with the connecting rod 3. At this time, the upper end of the spring 6 abuts against the M region of the cavity 301 on the connecting rod 3, and the lower end of the spring 6 abuts against the N region of the top cover 4. The spring 6 is in a slightly compressed initial state. A portion of the lower section of the connecting rod 3 is inserted into the top cover by a distance X1, forming an auxiliary support section. The maximum movable distance of the guide rail 1 along the slider 2 is X2.

[0036] 5) Insert the tail of the pin 14 into the nozzle pin hole 15 on the front panel of the nozzle 11 to achieve pre-positioning between the housing and the nozzle 11. In one embodiment, the pin 14 is interference-fitted with the bottom cover pin hole 505 and the nozzle pin hole 15 respectively. The head and tail of the pin 14 are pressed into the three pin holes by an external device. The pin 14 can also be inserted into the three pin holes by other means.

[0037] 6) Insert the fastening bolts 10 into the through holes at the four corners of the top cover 4 and the bottom cover 5, and screw the fastening bolts 10 into the threaded holes on the front panel of the printhead 11 of the inkjet printer, so that the housing and the front panel of the printhead 11 are firmly connected, ensuring that the housing and the printhead 11 can move up and down synchronously.

[0038] like Figure 16 As shown, the buffer mechanism of this embodiment is applied to the production line work scenario of inkjet printing and coding equipment. The upper end of the connecting rod 3 is clamped and fixed by the external bracket. The substrate 13 to be printed moves along the specified direction on the production line. When the height of the substrate 13 to be printed is higher than the lowest position of the guide plate 12 at the lower end of the print head 11, the substrate 13 will press the guide plate 12 upward. At this time, the housing fixedly connected to the nozzle 11 begins to function. The impact force of the substrate 13 causing the nozzle 11 and the housing to move upward together. At this time, the slider 2 inside the bottom cover 5 moves upward in a straight line along the guide rail 1 at the lower end of the connecting rod 3. The spring 6 is compressed, and the lower end of the plug screw 7 protrudes. (See below) Figure 17 and Figure 18 ; After the substrate 13 passes through the nozzle 11, the external force is removed, the spring 6 is released, and the nozzle 11 and the housing return to their initial state.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel buffer mechanism, characterized in that, The device includes a linear guide rail assembly, a buffer support assembly, a spring (6), and a stop screw (7). The linear guide rail assembly includes a guide rail (1) and a slider (2). The buffer support assembly includes a connecting rod (3) and a housing consisting of a top cover (4) and a bottom cover (5). The housing and the front panel of the nozzle (11) are pre-positioned by a pin (14) and a pin hole (15). The housing and the front panel of the nozzle (11) are fixedly connected by bolts. The lower end of the guide rail (1) and the connecting rod (3) are fixedly connected. The rear end of the slider (2) and the front end of the bottom cover (5) are fixedly connected by bolts. The upper and lower ends of the top cover (4) are respectively provided with upper inlet holes (402). The lower inlet hole (401) and the plug screw (7) enter the cavity of the housing through the lower inlet hole (401). The spring (6), the guide rail (1) and the connecting rod (3) enter the cavity of the housing through the upper inlet hole (402). The spring (6) is sleeved on the plug screw (7). The upper and lower ends of the spring (6) abut against the receiving cavity (301) at the lower end of the connecting rod (3) and the inner wall of the lower part of the top cover (4), respectively. The slider (2) is slidably connected and sleeved on the outside of the guide rail (1) in the up and down direction. The upper end of the receiving cavity (301) is provided with a threaded hole (302). The plug screw (7) is screwed into the threaded hole (302) through the threaded connection. When an external force strikes the guide plate (12) at the bottom of the nozzle (11), the slider (2) moves upward along the guide rail (1) and compresses the spring (6). When the external force is eliminated, the spring (6) resets and drives the slider (2) to move downward in a straight line so that the nozzle (11) returns to its original position.

2. The novel buffer mechanism according to claim 1, characterized in that, The rear end of the top cover (4) is provided with a top cover positioning post (403) and a top cover positioning hole (404), and the front end of the bottom cover (5) is provided with a bottom cover positioning post (502) and a bottom cover positioning hole (503). The top cover positioning post (403) and the bottom cover positioning hole (503) are connected in a fitting manner, and the bottom cover positioning post (502) and the top cover positioning hole (404) are connected in a fitting manner, so that the top cover (4) and the bottom cover (5) are pre-positioned.

3. The novel buffer mechanism according to claim 2, characterized in that, The top cover (4) has threaded holes (405) on the left and right sides of the rear end, and the bottom cover (5) has through holes (504) on the left and right sides. The top cover threaded holes (405) and the bottom cover through holes (504) are in corresponding positions. The top cover (4) and the bottom cover (5) are fixedly connected by screwing connecting screws (8) into the bottom cover through holes (504) and the top cover threaded holes (405).

4. The novel buffer mechanism according to claim 1, characterized in that, The slider (2) is provided with a steel ball (201), and the guide rail (1) and the slider (2) are limited by the sliding cooperation of the steel ball (201).

5. The novel buffer mechanism according to claim 1, characterized in that, The bottom cover (5) has a positioning groove (501) in the middle, and the slider (2) is pre-positioned by embedding in the positioning groove (501).

6. The novel buffer mechanism according to claim 1, characterized in that, The bottom cover (5) has a bottom cover pin hole (505) through it from front to back. The pin (14) passes through the bottom cover pin hole (505) from front to back. The tail of the pin (14) is inserted into the nozzle pin hole (15) on the front panel of the nozzle (11).

7. The novel buffer mechanism according to claim 1, characterized in that, The lower part of the connecting rod (3) is provided with a guide rail mounting surface (303) along the tangential direction. The guide rail mounting surface (303) is provided with a screw hole (304). The guide rail (1) is provided with a guide rail through hole (101). The guide rail (1) and the guide rail mounting surface (303) are fixedly connected by screwing a fixing screw (9) radially into the guide rail through hole (101) and the screw hole (304).

8. The novel buffer mechanism according to claim 7, characterized in that, The guide rail mounting surface (303) is provided with a guide rail limiting protrusion (305) along the axial direction. The bottom surface of the guide rail (1) is provided with a groove that cooperates with the guide rail limiting protrusion (305). The guide rail (1) and the guide rail limiting protrusion (305) are pre-positioned by the cooperation of the concave and convex structure.

9. The assembly method of the novel buffer mechanism according to claim 1, characterized in that, Includes the following steps: 1) Fix the guide rail (1) to the connecting rod (3); 2) Insert the slider (2) into the bottom cover (5), and fasten the bottom cover (5) and the slider (2) to achieve the positioning of the slider (2). Then insert the pin (14) into the bottom cover pin hole (505) of the bottom cover (5). 3) Assemble the top cover (4) and bottom cover (5). The top cover (4) and bottom cover (5) are pre-positioned by hole-shaft fitting and then fixed by bolts to complete the shell assembly; 4) The plug screw (7) enters the housing through the lower inlet hole (401), and the spring (6) enters the housing through the upper inlet hole (402) and is fitted onto the plug screw (7). The assembled guide rail (1) and connecting rod (3) are inserted into the designated position along the opening of the slider (2). The plug screw (7) is tightened so that the threaded part of the plug screw (7) is tightly fitted with the connecting rod (3). 5) Insert the tail of the pin (14) into the nozzle pin hole (15) on the front panel of the nozzle (11) to achieve pre-positioning between the housing and the nozzle (11); The pin (14) can be press-fitted with the bottom cover pin hole (505) and the nozzle pin hole (15) respectively. The pin (14) is pressed into the three pin holes by external equipment. 6) Insert the fastening bolts (10) into the through holes at the four corners of the top cover (4) and bottom cover (5), and screw the fastening bolts (10) into the threaded holes of the front panel of the nozzle (11) to make the housing and the front panel of the nozzle (11) securely connected.

10. A method of using the novel buffer mechanism as described in claim 1, characterized in that, Includes the following steps: 1) The upper end of the fixed connecting rod (3) is held by an external bracket, and the substrate (13) moves along the specified direction on the production line; 2) When the height of the substrate (13) is higher than the lowest position of the guide plate (12) at the lower end of the nozzle (11), the substrate (13) presses the guide plate (12) upward, causing the nozzle (11) and the housing to move upward in a straight line, and the slider (2) moves upward in a straight line along the guide rail (1) to compress the spring (6). 3) When the substrate (13) passes through the nozzle (11), the external force is removed, the spring (6) is released, and the nozzle (11) and the housing are reset to their initial state.

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