Dispensing needle cleaning device and dispensing device
By designing a dispensing needle cleaning device with a non-contact air blowing structure and automatic positioning function, the problem of difficulty in removing residual glue from the dispensing needle is solved, efficient cleaning and rapid replacement are achieved, and the dispensing effect and compatibility are improved.
Patent Information
- Application Number
- CN202422376784.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-09-27
AI Technical Summary
In the existing technology, it is difficult to effectively remove the glue remaining on the dispensing needle, resulting in poor dispensing effect and a high defective rate of the product to be dispensed. In addition, the traditional cleaning method easily causes the needle to tilt and move inaccurately, and is incompatible with special-shaped needles.
A dispensing needle cleaning device is designed. It adopts an air blowing structure to clean the needle through the gas channel and in a non-contact manner. It is combined with a positioning column to achieve automatic positioning. It is suitable for various special-shaped needles and integrates the automatic positioning function after cleaning and replacement.
It achieves contactless cleaning, avoids needle deflection, improves cleaning effect and compatibility, simplifies the needle replacement process, and improves dispensing efficiency.
Smart Images
Figure CN223405203U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of glue dispensing technology, and in particular to a glue dispensing needle cleaning device and a glue dispensing device. Background Art
[0002] With the development of the automotive industry, connectors in automotive electrical systems are increasingly required to have higher waterproof performance. Consequently, the automated production of connectors requires a dispensing process. After dispensing, the highly fluid glue tends to adhere to the dispensing needle. This buildup can cause the glue to adhere to the needle tip or the sidewall of the product being dispensed, resulting in poor dispensing results and a high defect rate for the product being dispensed. Utility Model Content
[0003] The purpose of this application is to provide a dispensing needle cleaning device and a dispensing device, which can solve the problem that after the product is dispensed, glue sticks to the dispensing needle, resulting in poor dispensing effect and high defective rate of the product to be dispensed.
[0004] In order to solve the above problems, the present application provides a dispensing needle cleaning device, which has a first direction, and the dispensing needle cleaning device includes an air blowing structure, which includes a base and a cover plate arranged on the base; the base is provided with a groove, a first needle inlet hole, an air inlet hole, an air outlet hole and an air blowing channel, the groove is arranged on the surface of the base facing the cover plate, and the cross-sectional area of the groove perpendicular to the first direction gradually decreases toward the cover plate, the first needle inlet hole is arranged at the bottom of the groove for the dispensing needle to extend into, and the air inlet hole is connected to the air source, The air outlet is arranged on the groove wall of the groove and is connected to the first needle inlet hole, and the blowing channel is connected between the air inlet hole and the air outlet hole; the cover plate includes a main body and a protruding portion, the protruding portion protrudes from the side of the main body close to the base and is correspondingly arranged in the groove, the cross-sectional area of the protruding portion in a direction perpendicular to the first direction gradually decreases toward the back of the main body, and there is a gap between the side wall of the protruding portion and the groove wall of the groove, and the cover plate is also provided with a second needle inlet hole that passes through the main body and the protruding portion, and the second needle inlet hole is connected to the first needle inlet hole for the dispensing needle to extend into.
[0005] In order to solve the above problems, the present application also provides a dispensing device, including the dispensing needle cleaning device and the dispensing mechanism of the present application, and the first connecting member of the dispensing needle cleaning device is detachably connected to the dispensing mechanism.
[0006] When the dispensing needle cleaning device of the present application is in use, the dispensing needle is inserted into the second needle inlet hole and the first needle inlet hole, the air inlet hole of the base is connected to the air source, and the air outlet hole is connected to the first needle inlet hole. Gas enters from the air inlet hole, passes through the blowing channel, and blows from the air outlet hole to the dispensing needle in the first needle inlet hole, thereby blowing off the residual glue on the dispensing needle and cleaning the dispensing needle. When the dispensing needle cleaning device of the present application cleans the dispensing needle, the dispensing needle cleaning device and the dispensing needle do not contact each other, avoiding contact with the dispensing needle, which may cause the dispensing needle to be skewed or moved inaccurately.
[0007] The dispensing needle cleaning device of the present application cleans the dispensing needle by blowing gas toward the dispensing needle, and can be applied to various special-shaped dispensing needles, thereby improving the compatibility and versatility of the dispensing needle cleaning device.
[0008] In this application, the cross-sectional area of the groove perpendicular to the first direction gradually decreases toward the cover plate, and the cross-sectional area of the protrusion perpendicular to the first direction gradually decreases toward the main body. After the gas pressure is discharged from the air outlet, it is enhanced in the gap between the groove and the protrusion, which is beneficial to improving the cleaning effect of the gas on the dispensing needle.
[0009] The dispensing needle cleaning device of this application has a positioning post installed on the cover plate. After the dispensing needle is replaced, the dispensing needle is initially positioned by the servo's teach pendant. The dispensing needle moves into the positioning hole of the positioning post, and the teach pendant saves the current origin. The internal program of the entire machine trajectory automatically updates the points, allowing the entire machine trajectory to be quickly edited after the dispensing needle is replaced. The dispensing needle cleaning device of this application integrates the cleaning function of the dispensing needle and the automatic positioning function after replacement. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0011] Figure 1 2. It is a structural schematic diagram of a dispensing needle inserted into a dispensing needle cleaning device according to an embodiment of the present application;
[0012] Figure 2 2. It is an exploded schematic diagram of a dispensing needle cleaning device according to an embodiment of the present application;
[0013] Figure 3 is a top view of a dispensing needle inserted into a dispensing needle cleaning device according to an embodiment of the present application;
[0014] Figure 4 of Figure 3 AA cross-sectional diagram;
[0015] Figure 5 yes Figure 4 An enlarged schematic diagram of circle C;
[0016] Figure 6 of Figure 3 BB cross-sectional diagram;
[0017] Figure 7 A schematic structural diagram of a cover plate according to an embodiment of the present application;
[0018] Figure 8 A schematic structural diagram of a base according to an embodiment of the present application;
[0019] Figure 9 Schematic diagram of the structure of the dispensing device of an embodiment of the present application;
[0020] Figure 10 It is a structural schematic diagram of the first connecting member of an embodiment of the present application.
[0021] Description of reference numerals:
[0022] 1000, dispensing device; 100, dispensing needle cleaning device; 200, dispensing needle; 300, dispensing mechanism;
[0023] 1. Blowing structure; 2. Positioning column; 3. Connecting structure; 4. Collecting structure;
[0024] 11. Base; 111. Groove; 112. First needle inlet hole; 113. Air inlet hole; 114. Air outlet hole; 115. Air blowing channel; 116. First fastening hole; 117. Second fastening hole; 118. Air inlet channel; 1111. Groove bottom; 1112. Groove wall; 1121. First gradient portion;
[0025] 12. Cover plate; 121. Main body; 122. Protruding portion; 123. Second needle inlet hole; 1231. Second gradient portion;
[0026] 21. Positioning hole;
[0027] 31, first connecting member; 311, first fastening member; 312, third fastening hole; 313, fourth fastening hole;
[0028] 32. Second connecting member; 321. Support plate; 322. Connecting plate; 323. Baffle;
[0029] 41. Collection cavity. DETAILED DESCRIPTION
[0030] The following describes in detail the preferred embodiments of the present application in conjunction with the accompanying drawings to fully introduce the technical content of the present application to those skilled in the art, to illustrate that the present application can be implemented, to make the technical content disclosed in the present application clearer, and to make it easier for those skilled in the art to understand how to implement the present application. However, the present application can be embodied in many different forms of embodiments, and the scope of protection of the present application is not limited to the embodiments mentioned herein. The description of the embodiments below is not intended to limit the scope of the present application.
[0031] The directional terms mentioned in this application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only directions in the drawings. The directional terms used in this article are used to explain and illustrate this application, and are not used to limit the scope of protection of this application.
[0032] In the drawings, components with the same structure are represented by the same numerical labels, and components with similar structures or functions are represented by similar numerical labels. In addition, for the sake of ease of understanding and description, the size and thickness of each component shown in the drawings are arbitrarily shown, and this application does not limit the size and thickness of each component.
[0033] Currently, the glue remaining on the tip of the dispensing needle can be removed by scraping the needle back and forth with a clamp, but in this method, the glue wiping mechanism needs to contact the needle, which can easily cause the needle to tilt and move inaccurately, and the foam used for wiping glue in this method needs to be replaced frequently, which increases the cost of spare parts. Currently, the dispensing needle can also be placed in a cleaning station, and then the clamping cylinder is used to control the closing of the clamping jaws, and the dispensing needle is moved up and down to remove the glue, but in this method, the clamping jaws need to contact the needle, which can easily cause the needle to tilt and move inaccurately, and the clamping jaws are not compatible with a variety of special-shaped needles. In the above two methods, the dispensing needle needs to be re-taught after replacement, which reduces the dispensing efficiency. In order to solve the above problems, the embodiments of the present application provide a dispensing needle cleaning device and a dispensing device.
[0034] Example 1
[0035] See also Figure 1 The dispensing needle cleaning device 100 of this embodiment has a first direction M, a second direction N, and a third direction P that intersect. In this embodiment, the first direction M, the second direction N, and the third direction P are perpendicular to each other. In other embodiments, the first direction M, the second direction N, and the third direction P may not be perpendicular to each other.
[0036] See also Figures 1-8 The dispensing needle cleaning device 100 includes an air blowing structure 1. The air blowing structure 1 includes a base 11 and a cover plate 12 disposed on the base 11.
[0037] The base 11 is provided with a groove 111 , a first needle inlet hole 112 , an air inlet hole 113 , an air outlet hole 114 and an air blowing channel 115 .
[0038] See also Figure 5 and Figure 8 The groove 111 is provided on the surface of the base 11 facing the cover plate 12. The cross-sectional area of the groove 111 perpendicular to the first direction M gradually decreases away from the cover plate 12. In other words, the cross-sectional area of the groove 111 perpendicular to the first direction M gradually decreases as it moves away from the cover plate 12. The cross-sectional area of the groove 111 perpendicular to the first direction M gradually decreases from the end of the groove 111 close to the cover plate 12 to the end of the groove 111 away from the cover plate 12. In this embodiment, the groove 111 is truncated cone-shaped. The groove 111 has a groove bottom 1111 and groove walls 1112.
[0039] See also Figure 4 、 Figure 5 、 Figure 6 and Figure 8 The first needle hole 112 is provided at the bottom 1111 of the groove 111 for the dispensing needle 200 to extend into. Specifically, the first needle hole 112 extends along the first direction M and passes through the base 11.
[0040] See also Figure 4 and Figure 5 The air inlet 113 is connected to the air source. In this embodiment, the air inlet 113 is connected to the air inlet channel 118, and the air source reaches the air inlet 113 through the air inlet channel 118.
[0041] See also Figure 4 and Figure 5 The air outlet holes 114 are disposed on the groove wall 1112 of the groove 111 and communicate with the first needle inlet hole 112. The number of air outlet holes 114 is an even number, and the air outlet holes 114 are symmetrically disposed in pairs on the groove wall 1112 of the groove 111. In this embodiment, there are two air outlet holes 114, and the air outlet holes 114 are symmetrically disposed on the groove wall 1112 of the groove 111. The air blowing channel 115 is connected between the air inlet hole 113 and the air outlet holes 114.
[0042] See also Figure 4 、 Figure 5 、 Figure 6 and Figure 7The cover plate 12 includes a main body 121 and a protruding portion 122. The protruding portion 122 protrudes from the side of the main body 121 close to the base 11 and is correspondingly arranged in the groove 111. The cross-sectional area of the protruding portion 122 in the direction perpendicular to the first direction M gradually decreases away from the main body 121. In other words, the cross-sectional area of the protruding portion 122 in the direction perpendicular to the first direction M gradually decreases along the direction away from the main body 121, and the cross-sectional area of the protruding portion 122 in the direction perpendicular to the first direction M gradually decreases from the end of the protruding portion 122 close to the main body 121 to the end of the protruding portion 122 away from the main body 121. In this embodiment, the protruding portion 122 is truncated cone-shaped.
[0043] See also Figure 5 A gap is defined between the sidewall of the protrusion 122 and the groove wall 1112 of the groove 111. The surface of the main body 121 near the base 11 is in contact with the surface of the base 11 near the cover 12. The cover 12 further defines a second needle entry hole 123 extending through the main body 121 and the protrusion 122. The second needle entry hole 123 communicates with the first needle entry hole 112 to allow the dispensing needle 200 to extend therethrough. In this embodiment, the central axis of the first needle entry hole 112 in the first direction M coincides with the central axis of the second needle entry hole 123 in the first direction M.
[0044] See also Figure 4 、 Figure 5 and Figure 6 When the dispensing needle cleaning device 100 of this embodiment is in use, the dispensing needle 200 is inserted into the second needle inlet hole 123 and the first needle inlet hole 112. The air inlet hole 113 of the base 11 is connected to the air source through the air inlet channel 118, and the air outlet hole 114 is connected to the first needle inlet hole 112. The gas enters from the air inlet hole 113, passes through the air blowing channel 115, and is blown from the air outlet hole 114 toward the dispensing needle 200 in the first needle inlet hole 112, thereby blowing off the residual glue on the dispensing needle 200 and cleaning the dispensing needle 200. When the dispensing needle cleaning device 100 of this embodiment cleans the dispensing needle 200, the dispensing needle cleaning device 100 and the dispensing needle 200 do not contact each other, avoiding contact with the dispensing needle 200 that may cause the dispensing needle 200 to be skewed or moved inaccurately. Moreover, the dispensing needle cleaning device 100 of the present application cleans the dispensing needle 200 by blowing gas, and can be applied to various special-shaped dispensing needles 200, thereby improving the compatibility and versatility of the dispensing needle cleaning device 100.
[0045] In this embodiment, the cross-sectional area of the groove 111 perpendicular to the first direction M gradually decreases toward the cover plate 12, and the cross-sectional area of the protrusion 122 perpendicular to the first direction M gradually decreases toward the main body 121. After the gas pressure is discharged from the air outlet 114, it is enhanced in the gap between the groove 111 and the protrusion 122, which is beneficial to improving the cleaning effect of the gas on the dispensing needle 200.
[0046] See also Figure 8 , the first needle hole 112 is away from the end of the second needle hole 123 ( Figure 8 The cross-sectional area perpendicular to the first direction M is larger than the end of the first needle hole 112 near the second needle hole 123 ( Figure 8 The cross-sectional area of the first gradual change portion 1121 at a point perpendicular to the first direction M is the upper end of the first gradual change portion 112. In this embodiment, the first needle inlet hole 112 has a first gradient portion 1121 at one end away from the second needle inlet hole 123. The cross-sectional area of the first gradual change portion 1121 at a point perpendicular to the first direction M gradually increases toward the cover plate 12. In other words, the cross-sectional area of the first gradual change portion 1121 at a point perpendicular to the first direction M gradually increases in the direction away from the cover plate 12, and the cross-sectional area of the first gradual change portion 1121 at a point perpendicular to the first direction M gradually increases from the end of the first gradual change portion 1121 close to the cover plate 12 to the end of the first gradual change portion 1121 away from the cover plate 12. In this way, the cross-sectional area of the end of the first needle inlet hole 112 away from the second needle inlet hole 123 at a point perpendicular to the first direction M can be expanded, which facilitates the rapid discharge of waste rubber and prevents the blown waste rubber from accumulating at the outlet.
[0047] See also Figure 7 The second needle hole 123 is close to one end of the first needle hole 112 ( Figure 7 The cross-sectional area of the second needle hole 123 in the vertical direction M is smaller than that of the end of the second needle hole 123 away from the first needle hole 112 ( Figure 7 The upper end of the second needle hole 123) has a cross-sectional area perpendicular to the first direction M. In this embodiment, the second needle hole 123 has a second gradient portion 1231 at one end away from the first needle hole 112. The cross-sectional area of the second gradient portion 1231 perpendicular to the first direction M gradually decreases toward the base 11. In other words, the cross-sectional area of the second gradient portion 1231 perpendicular to the first direction M gradually decreases along the direction toward the base 11, and the cross-sectional area of the second gradient portion 1231 perpendicular to the first direction M gradually decreases from the end of the first second gradient portion 1231 away from the base 11 to the end of the second gradient portion 1231 close to the base 11. In this way, the cross-sectional area of the end of the second needle hole 123 away from the first needle hole 112 perpendicular to the first direction M can be expanded, so that the deformed dispensing needle 200 can enter the second needle hole 123 and the first needle hole 112 for cleaning.
[0048] See also Figure 1 and Figure 3The dispensing needle cleaning device 100 also includes a positioning column 2. The positioning column 2 is provided on the surface of the main body 121 on the side away from the base 11, and the positioning column 2 has a positioning hole 21 for the dispensing needle 200 to extend into. Therefore, after the dispensing needle 200 is replaced, the dispensing needle 200 is positioned at the initial position through the servo teach pendant, and the dispensing needle 200 moves into the positioning hole 21 of the positioning column 2. The teach pendant saves the current origin, and the internal program of the whole machine trajectory automatically updates the point position, thereby quickly editing the whole machine trajectory after the dispensing needle 200 is replaced. The dispensing needle cleaning device 100 of this embodiment also realizes the integration of the cleaning function of the dispensing needle 200 and the automatic positioning function after replacement.
[0049] See also Figure 1 and Figure 2 The dispensing needle cleaning device 100 also includes a connecting structure 3. The connecting structure 3 includes a first connecting member 31, which is detachably connected to the base 11. In this embodiment, the base 11 is provided with a first fastening hole 116 and a second fastening hole 117, and the first connecting member 31 is provided with a first fastening member 311 and a third fastening hole 312. The connecting structure 3 also includes a second fastener (not shown). The first fastener 311 is inserted into the first fastening hole 116, and the second fastener (not shown) passes through the third fastening hole 312 and the second fastening hole 117 to fix the first connecting member 31 and the base 11. In some embodiments, the first fastener 311 can be a locating pin, and the second fastener can be a bolt.
[0050] See also Figures 1-4 and Figure 6 The dispensing needle cleaning device 100 also includes a collection structure 4. The collection structure 4 is disposed on a side of the base 11 away from the cover plate 12. The side of the collection structure 4 facing the base 11 includes a collection chamber 41. The collection chamber 41 of the collection structure 4 collects waste glue blown off the dispensing needle 200. The collection structure 4 of the present application does not wear out during use, does not need to be replaced during use of the dispensing needle cleaning device 100, and easily identifies whether cleaning is necessary.
[0051] See also Figures 1-4 and Figure 6 The connecting structure 3 further includes a second connecting member 32. The second connecting member 32 includes a supporting plate 321, a connecting plate 322 and a baffle 323.
[0052] The collecting structure 4 is disposed on a surface of the supporting plate 321 on a side close to the base 11. The collecting structure 4 can be disposed on the supporting plate 321 in a pull-out manner.
[0053] The connecting plate 322 is used to connect the supporting plate 321 and the first connecting member 31. In this embodiment, the connecting plate 322 is integrally formed with the supporting plate 321 and then fixed to the first connecting member 31 by bolts. In other embodiments, the connecting plate 322 can also be fixed to the supporting plate 321 by bolts, welding, or other processes.
[0054] The baffles 323 are disposed around the supporting plate 321. In this embodiment, the baffles 323 are disposed on three sides of the supporting plate 321. Specifically, the baffles 323 have a notch on one side of the supporting plate 321 to facilitate removal of the collection structure 4 from the supporting plate 321, pouring out the waste rubber in the collection chamber 41, and then placing it back on the supporting plate 321.
[0055] Example 2
[0056] See also Figure 9 This embodiment provides a dispensing device 1000. The dispensing device includes not only the dispensing needle cleaning device 100 of Example 1, but also a dispensing mechanism 300. The first connecting member 31 of the dispensing needle cleaning device 100 is detachably connected to the dispensing mechanism 300. In this embodiment, the dispensing needle cleaning device 100 is connected to the dispensing mechanism 300. In other embodiments, the dispensing needle cleaning device 100 can also be connected to equipment such as a robotic arm.
[0057] See also Figure 10 The first connecting member 31 is provided with a fourth fastening hole 313. A third fastening member (not shown) is passed through the fourth fastening hole 313 to connect to the dispensing mechanism 300. In this embodiment, the third fastening member is a bolt.
[0058] See also Figure 9 , the dispensing mechanism 300 is provided with a dispensing needle 200. After the dispensing mechanism 300 completes the dispensing, the dispensing needle 200 is moved into the second needle inlet hole 123 and the first needle inlet hole 112 through the motion module of the dispensing mechanism 300, the air inlet hole 113 of the base 11 is connected to the gas source through the air inlet channel 118, and the air outlet hole 114 is connected to the first needle inlet hole 112. The gas enters from the air inlet hole 113 and passes through the blowing channel 115 and blows from the air outlet hole 114 to the dispensing needle 200 in the first needle inlet hole 112, thereby blowing off the residual glue on the dispensing needle 200 and cleaning the dispensing needle 200. When the dispensing needle cleaning device 100 of this embodiment cleans the dispensing needle 200, the dispensing needle cleaning device 100 and the dispensing needle 200 have no contact, avoiding contact with the dispensing needle 200 to cause the dispensing needle 200 to be skewed and inaccurately positioned. Moreover, the dispensing needle cleaning device 100 of the present application cleans the dispensing needle 200 by blowing gas, and can be applied to various special-shaped dispensing needles 200, thereby improving the compatibility and versatility of the dispensing needle cleaning device 100.
[0059] In this embodiment, the cross-sectional area of the groove 111 perpendicular to the first direction M gradually decreases toward the cover plate 12, and the cross-sectional area of the protrusion 122 perpendicular to the first direction M gradually decreases toward the main body 121. After the gas pressure is discharged from the air outlet 114, it is enhanced in the gap between the groove 111 and the protrusion 122, which is beneficial to improving the cleaning effect of the gas on the dispensing needle 200.
[0060] The above is a detailed introduction to a dispensing needle cleaning device and a dispensing device provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the core idea of the present application. At the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A dispensing needle cleaning device, characterized in that: Having a first direction (M), the dispensing needle cleaning device comprises an air blowing structure (1), and the air blowing structure (1) comprises a base (11) and a cover plate (12) arranged on the base (11); The base (11) is provided with a groove (111), a first needle inlet hole (112), an air inlet hole (113), an air outlet hole (114) and an air blowing channel (115); the groove (111) is provided on a surface of the base (11) facing the cover plate (12); the cross-sectional area of the groove (111) perpendicular to the first direction (M) gradually decreases away from the cover plate (12); the first needle inlet hole (112) is provided at the bottom (1111) of the groove (111) for the dispensing needle (200) to extend therein; the air inlet hole (113) is connected to an air source; the air outlet hole (114) is provided on the groove wall (1112) of the groove (111) and communicates with the first needle inlet hole (112); and the air blowing channel (115) is connected between the air inlet hole (113) and the air outlet hole (114); The cover plate (12) includes a main body (121) and a protruding portion (122), wherein the protruding portion (122) protrudes from a side of the main body (121) close to the base (11) and is correspondingly arranged in the groove (111), and the cross-sectional area of the protruding portion (122) in a direction perpendicular to the first direction (M) gradually decreases toward the back of the main body (121), and there is a gap between the side wall of the protruding portion (122) and the groove wall (1112) of the groove (111), and the cover plate (12) is further provided with a second needle hole (123) passing through the main body (121) and the protruding portion (122), and the second needle hole (123) is connected to the first needle hole (112) for the dispensing needle (200) to extend therein.
2. The dispensing needle cleaning device according to claim 1, characterized in that: The cross-sectional area of the end of the first needle entry hole (112) away from the second needle entry hole (123) perpendicular to the first direction (M) is greater than the cross-sectional area of the end of the first needle entry hole (112) close to the second needle entry hole (123) perpendicular to the first direction (M).
3. The dispensing needle cleaning device according to claim 2, characterized in that: The first needle entry hole (112) has a first gradient portion (1121) at one end away from the second needle entry hole (123), and the cross-sectional area of the first gradient portion (1121) perpendicular to the first direction (M) gradually increases toward the cover plate (12).
4. The dispensing needle cleaning device according to claim 1, characterized in that: The cross-sectional area of the end of the second needle entry hole (123) close to the first needle entry hole (112) perpendicular to the first direction (M) is smaller than the cross-sectional area of the end of the second needle entry hole (123) away from the first needle entry hole (112) perpendicular to the first direction (M).
5. The dispensing needle cleaning device according to claim 4, characterized in that: The second needle entry hole (123) has a second gradient portion (1231) at one end away from the first needle entry hole (112), and the cross-sectional area of the second gradient portion (1231) perpendicular to the first direction (M) gradually decreases toward the base (11).
6. The dispensing needle cleaning device according to claim 1, characterized in that: The number of the air outlet holes (114) is an even number, and the air outlet holes (114) are symmetrically arranged in pairs on the groove wall (1112) of the groove (111).
7. The dispensing needle cleaning device according to claim 1, characterized in that: The dispensing needle cleaning device further comprises a positioning column (2), wherein the positioning column (2) is arranged on a surface of the main body (121) on a side away from the base (11), and the positioning column (2) has a positioning hole (21) for the dispensing needle (200) to extend into.
8. The dispensing needle cleaning device according to claim 1, characterized in that: The dispensing needle cleaning device further comprises a connecting structure (3), wherein the connecting structure (3) comprises a first connecting member (31), and the first connecting member (31) is detachably connected to the base (11).
9. The dispensing needle cleaning device according to claim 8, characterized in that: The base (11) is provided with a first fastening hole (116) and a second fastening hole (117), the first connecting member (31) is provided with a first fastening member and a third fastening hole (312), and the connecting structure (3) further comprises a second fastening member, the first fastening member is inserted into the first fastening hole (116), and the second fastening member passes through the third fastening hole (312) and the second fastening hole (117) to fix the first connecting member (31) and the base (11).
10. The dispensing needle cleaning device according to claim 8, characterized in that: The dispensing needle cleaning device further comprises a collecting structure (4), wherein the collecting structure (4) is arranged on a side of the base (11) away from the cover plate (12), and the collecting structure (4) has a collecting cavity (41) on a side facing the base (11).
11. The dispensing needle cleaning device according to claim 10, characterized in that: The connecting structure (3) further includes a second connecting member (32), the second connecting member (32) including a supporting plate (321), a connecting plate (322) and a baffle (323), the collecting structure (4) is arranged on the surface of the supporting plate (321) on a side close to the base (11), the connecting plate (322) is used to connect the supporting plate (321) and the first connecting member (31), and the baffle (323) is arranged on the peripheral side of the supporting plate (321).
12. A dispensing device, characterized in that: The invention comprises a dispensing needle cleaning device and a dispensing mechanism according to any one of claims 1 to 11, wherein the first connecting member (31) of the dispensing needle cleaning device is detachably connected to the dispensing mechanism.