Glue dispensing needle head assembly and glue supply device

Abstract

The utility model provides a dispensing needle head assembly and a glue supply device. The dispensing needle head assembly comprises a dispensing seat, a mounting seat and a needle tube, the mounting seat is detachably connected with the dispensing seat, a first mounting hole is formed in the dispensing seat, the dispensing seat comprises a supporting seat, a connecting seat and a limiting clamp, one end of the connecting seat is fixedly connected with the supporting seat, the other end of the connecting seat is fixedly connected with the limiting clamp, and the first mounting hole penetrates through the supporting seat, the connecting seat and the limiting clamp; the limiting clamp is located on the side, close to the mounting base, of the connecting base, a second mounting hole is formed in the mounting base, the first mounting hole and the second mounting hole are coaxially formed, the needle tube penetrates through the first mounting hole and then extends out of the second mounting hole, the connecting base and the limiting clamp are arranged in the second mounting hole, and the inner wall of the second mounting hole abuts against the limiting clamp to lock the needle tube. The needle tube replacing method has the beneficial effects that the needle tube replacing step can be simplified, and the situation that whether the replaced needle tube is stable or not does not need to be manually checked is avoided.

Description

Technical Field

[0001] The present application relates to the field of glue dispensing technology, and in particular to a glue dispensing needle assembly and a glue supply device. Background Art

[0002] The glue dispensing machine is a common injection molding equipment, which mainly controls the fluid and drips the glue, paint and other liquids in the product process to the required position of each product by dotting, injecting and coating. For example, the glue dispensing valve on the glue dispensing machine can be used to drip and apply the fluid on the surface or inside of the product, and the glue flow rate can be changed mainly by changing the specifications of the glue dispensing needle on the glue dispensing valve.

[0003] Due to the diversity of dispensing products, dispensing needles of different specifications need to be replaced frequently. Manual calibration is required after each replacement of the dispensing needle. The calibration time is long, the manual calibration requirements are high, and improper manual operation may cause deformation of the dispensing needle and damage the dispensing needle. Utility Model Content

[0004] The utility model provides a glue dispensing needle assembly and a glue supply device to solve the problems of the existing glue dispensing machine, such as long calibration time, high manual calibration requirements, and irregular manual operation that may cause deformation of the glue dispensing needle and damage the glue dispensing needle.

[0005] The embodiment of the utility model is achieved as follows:

[0006] A dispensing needle assembly comprises a dispensing seat, a mounting seat and a needle tube, wherein the mounting seat is detachably connected to the dispensing seat, the dispensing seat is provided with a first mounting hole, and the dispensing seat comprises a supporting seat, a connecting seat and a limiting clamp which are arranged in sequence, the first mounting hole passes through the supporting seat, the connecting seat and the limiting clamp, the limiting clamp is located on the side of the connecting seat close to the mounting seat, the mounting seat is provided with a second mounting hole, the first mounting hole and the second mounting hole are coaxially arranged, the needle tube passes through the first mounting hole and then extends out through the second mounting hole, the connecting seat and the limiting clamp are placed in the second mounting hole, and the inner wall of the second mounting hole abuts against the limiting clamp to lock the needle tube.

[0007] The dispensing needle assembly of the present application first passes one end of the needle tube through the first mounting hole of the dispensing seat, and then passes the needle tube through the second mounting hole of the mounting seat. Afterwards, move the mounting seat so that the mounting seat is connected to the dispensing seat. At this time, the connecting seat and the limit clamp are both accommodated in the second mounting hole, and because the inner wall of the second mounting hole presses against the limit clamp, the limit clamp locks the needle tube placed in the first mounting hole and the second mounting hole. In this way, the needle tube is tightly fixed to the dispensing seat and the mounting seat, avoiding the needle tube from being offset due to the loose fixation of the needle tube, which requires manual correction. However, manual correction has the problems of long calibration time, high requirements for manual calibration, and irregular manual operation, which may also cause deformation of the dispensing needle and damage the dispensing needle.

[0008] In a possible embodiment, the limit clamp opens a limit space, and the limit clamp includes a plurality of limit members, and the plurality of limit members are distributed along the circumference of the needle tube. The limit space is formed between the plurality of limit members, and the plurality of limit members are fixedly connected to the connecting seat. The limit space connects the first mounting hole and the second mounting hole, and the limit space is used for the needle tube to pass through. When the inner wall of the second mounting hole abuts against the limit clamp, the plurality of limit members move toward the circumferential center to lock the needle tube.

[0009] In a possible embodiment, the limiting member includes a connecting portion, a supporting portion and a limiting portion, one end of the connecting portion is fixedly connected to the supporting portion, and the other end is fixedly connected to the limiting portion, one end of the supporting portion away from the connecting portion is fixedly connected to the connecting seat, and the limiting portion extends obliquely from one end of the connecting portion toward the circumferential center.

[0010] In a possible implementation manner, a side of the limiting portion away from the limiting space has an inclined first abutting surface, and the first abutting surface abuts against an inner wall of the second mounting hole.

[0011] In a possible implementation manner, the limiting portion has a second abutting surface on a side facing the adjacent limiting member, and the second abutting surface abuts against an outer surface of the needle tube.

[0012] In a possible implementation manner, the radial width of the connecting portion is greater than the radial width of the supporting portion.

[0013] In a possible embodiment, the mounting seat is provided with a first opening and a second opening, the first opening and the second opening are connected to the second mounting hole, the first opening is located at one end of the mounting seat close to the dispensing seat, the diameter of the first opening is larger than the diameter of the second opening and the diameter of the connecting seat, and the diameter of the second opening is smaller than the diameter of the limiting portion.

[0014] In a possible implementation manner, a diameter of the second mounting hole decreases from large to small in a direction from the first opening to the second opening.

[0015] In a possible implementation manner, an outer wall of the connecting seat is provided with an external thread, an inner wall of the second mounting hole is provided with an internal thread, and the connecting seat is threadedly connected to the mounting seat.

[0016] An embodiment of the present application also provides a glue supply device, including the glue dispensing needle assembly and the glue supply assembly as described above, the glue dispensing seat also includes a glue dispensing connector, the glue dispensing connector is connected to the glue supply assembly, a glue valve is provided in the glue supply assembly, and the glue is output from the glue valve, the glue supply assembly and the needle tube to the outside of the glue supply device in sequence.

[0017] The needle tube is passed through the first mounting hole and then extends out of the mounting seat through the second mounting hole. The mounting seat is rotated to connect the mounting seat to the dispensing seat. At the same time, in the process of connecting the mounting seat to the dispensing seat, part of the needle tube extends out of the mounting seat, and when the limit clamp is pressed by the inner wall of the second mounting hole, the multiple limit parts move toward the circumferential center to lock the needle tube. The user only needs to connect the mounting seat to the dispensing seat by rotating the mounting seat, thereby locking the needle tube placed in the first mounting hole and the second mounting hole into the dispensing seat and the mounting seat. This avoids the existing dispensing machines that require manual correction of whether the needle tube is locked, long manual calibration time, high manual calibration requirements, and irregular manual operation, which may also cause the dispensing needle to deform and damage the dispensing needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of an exploded view of a dispensing needle assembly according to an embodiment of the utility model.

[0020] Figure 2 Shows Figure 1 Schematic diagram of the disassembled needle tube and dispensing seat.

[0021] Figure 3 Shows Figure 1 Schematic diagram of the partial structure of the limit clamp.

[0022] Figure 4 Shows Figure 1 Schematic diagram of the cross-section of the dispensing needle assembly along the IV-IV direction.

[0023] Figure 5 This is a schematic structural diagram of a dispensing needle assembly according to an embodiment of the utility model.

[0024] Figure 6 It is a structural schematic diagram of a glue supply device according to an embodiment of the utility model.

[0025] Description of main component symbols:

[0026] Dispensing needle assembly 100

[0027] Dispensing seat 10

[0028] First mounting hole 11

[0029] Support seat 12

[0030] Connecting seat 13

[0031] Limit clip 14

[0032] Limited Space 141

[0033] Limiting piece 142

[0034] Connection part 143

[0035] Supporting portion 144

[0036] Limiting part 145

[0037] The first abutting surface 146

[0038] The second abutting surface 147

[0039] First surface 15

[0040] Glue connection parts 16

[0041] Mounting Block 20

[0042] Second mounting hole 21

[0043] First opening 22

[0044] Second opening 23

[0045] Needle 30

[0046] Needle cap 31

[0047] Raised portion 311

[0048] Needle seat 32

[0049] Needle 33

[0050] Glue supply device 200

[0051] Glue supply component 210 DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a centered element. When an element is considered to be "set on" another element, it may be directly set on the other element or there may also be a centered element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0055] Some embodiments of the present invention are described in detail. In the absence of conflict, the following embodiments and features of the embodiments can be combined with each other.

[0056] Example

[0057] See also Figures 1 to 5 This embodiment provides a glue dispensing needle assembly 100, which is used in a glue supply device. The glue supply device mainly controls the fluid, and drips glue, paint and other liquids to the required position of each product by dotting, injecting, coating and the like.

[0058] See also Figures 1 to 3The dispensing needle assembly 100 includes a dispensing seat 10, a mounting seat 20 and a needle tube 30. The dispensing seat 10 and the mounting seat 20 are arranged opposite to each other, and the mounting seat 20 is detachably connected to the dispensing seat 10. The dispensing seat 10 is provided with a first mounting hole 11, and the dispensing seat 10 includes a support seat 12, a connecting seat 13 and a limiting clamp 14. One end of the connecting seat 13 is fixedly connected to the support seat 12, and the other end is fixedly connected to the limiting clamp 14. The first mounting hole 11 passes through the support seat 12, the connecting seat 13 and the limiting clamp 14, and the limiting clamp 14 is located on the side of the connecting seat 13 close to the mounting seat 20. The mounting seat 20 is provided with a second mounting hole 21, and the first mounting hole 11 and the second mounting hole 21 are coaxially arranged. The needle tube 30 passes through the first mounting hole 11 and then extends out through the second mounting hole 21. The connecting seat 13 and the limiting clamp 14 are placed in the second mounting hole 21, and the inner wall of the second mounting hole 21 abuts against the limiting clamp 14 to lock the needle tube 30. In this embodiment, the outer wall of the connecting seat 13 is provided with an external thread, the inner wall of the second mounting hole 21 is provided with an internal thread, and the connecting seat 13 is threadedly connected to the mounting seat 20. In other embodiments, the connecting seat 13 can also be connected to the mounting seat 20 by snapping, and the present application does not limit the connection method between the connecting seat 13 and the mounting seat 20, as long as the connection between the connecting seat 13 and the mounting seat 20 is ensured to be detachable.

[0059] In the dispensing needle assembly 100, when the needle tube 30 needs to be installed to the dispensing seat 10 and the mounting seat 20, first, the user passes one end of the needle tube 30 through the first mounting hole 11, and then passes through the second mounting hole 21 to extend out of the dispensing needle assembly 100. At this time, the needle tube 30 is partially placed in the dispensing seat 10 and the mounting seat 20. The user then rotates the mounting seat 20 in the direction close to the dispensing seat 10 to connect the mounting seat 20 to the dispensing seat 10. At the same time, in the process of rotating the mounting seat 20 in the direction close to the dispensing seat 10, the limit clamp 14 is pressed by the inner wall of the second mounting hole 21 to lock the needle tube 30 placed in the dispensing seat 10 and the mounting seat 20. In this way, the needle tube 30 is firmly placed in the dispensing seat 10 and the mounting seat 20. Conversely, when the needle tube 30 in the dispensing seat 10 and the mounting seat 20 needs to be taken out, the user rotates the mounting seat 20 to separate the mounting seat 20 and the dispensing seat 10. During the separation of the mounting seat 20 and the dispensing seat 10, the inner wall of the second mounting hole 21 is separated from the limiting clip 14 to unlock the needle tube 30. In this way, the needle tube 30 can be taken out from the first mounting hole 11 and the second mounting hole 21.

[0060] The whole process only requires the user to pass the needle tube 30 through the first mounting hole 11 and the second mounting hole 21, and then rotate the mounting seat 20 in the direction close to the dispensing seat 10 to connect the mounting seat 20 to the dispensing seat 10. At the same time, the limit clip 14 is pressed by the inner wall of the second mounting hole 21 to automatically lock the needle tube 30. In this way, the whole process of replacing the needle 33 is simple and fast, and there is no need to manually check whether the needle tube 30 is installed tightly.

[0061] In some embodiments, please combine Figure 3 , the limiting clamp 14 opens a limited space 141, and the limiting clamp 14 includes a plurality of limiting members 142. The plurality of limiting members 142 are distributed along the circumference of the needle tube 30, and the limiting space 141 is formed between the plurality of limiting members 142. The connecting seat 13 is fixedly connected with the plurality of limiting members 142, and the limiting space 141 is connected to the first mounting hole 11 and the second mounting hole 21. The limiting space 141 is used for the needle tube 30 to pass through, and when the inner wall of the second mounting hole 21 presses against the limiting clamp 14, the plurality of limiting members 142 move toward the circumferential center to lock the needle tube 30. In this embodiment, the limiting clamp 14 has elastic force, and the number of the limiting members 142 is four, and the four limiting members 142 are circumferentially and spaced apart and distributed to the end of the connecting seat 13 away from the support seat 12. The four limiting members 142 jointly define a cross-shaped limiting space 141. When the user rotates the mounting seat 20 toward the direction close to the dispensing seat 10 so that the connecting seat 13 is connected to the mounting seat 20, the four limiting members 142 are all subjected to the upward resistance pressure of the inner wall of the second mounting hole 21. Since the limiting clamp 14 has elastic force, the four limiting members 142 move together toward the direction close to the circumferential center to lock the needle tube 30 placed in the first mounting hole 11 and the second mounting hole 21.

[0062] On the contrary, when it is necessary to take out the needle tube 30 in the dispensing seat 10 and the mounting seat 20, the user rotates the mounting seat 20 to separate the dispensing seat 10. During the separation of the mounting seat 20 and the dispensing seat 10, the inner wall of the second mounting hole 21 separates from the limit clamp 14 to unlock the needle tube 30. Due to the elastic restoring force of the limit clamp 14, the four limit members 142 all move away from the circumferential center to unlock the needle tube 30 placed in the first mounting hole 11 and the second mounting hole 21. In this way, the needle tube 30 can be taken out from the first mounting hole 11 and the second mounting hole 21.

[0063] It should be noted that the number of the limit members 142 can be six or eight. The present application does not limit the specific number of the limit members 142. It is sufficient to ensure that when the multiple limit members 142 are subjected to the upward pressure of the inner wall of the second mounting hole 21, the multiple limit members 142 can move together in the direction close to the circumferential center to lock the needle tube 30 placed in the first mounting hole 11 and the second mounting hole 21.

[0064] Furthermore, the limiting member 142 includes a connecting portion 143, a supporting portion 144 and a limiting portion 145, one end of the connecting portion 143 is fixedly connected to the supporting portion 144, and the other end is fixedly connected to the limiting portion 145. The radial width of the connecting portion 143 is greater than the radial width of the supporting portion 144. When the limiting clamp 14 is subjected to the upward pressure of the inner wall of the second mounting hole 21, the supporting portion 144 with a smaller radial width can better lock the needle tube 30. The connecting seat 13 is fixedly connected to one end of the supporting portion 144 away from the connecting portion 143, and the limiting portion 145 extends obliquely from one end of the connecting portion 143 toward the circumferential center. When the limiting clamp 14 is subjected to the upward pressure of the inner wall of the second mounting hole 21, the plurality of limiting portions 145 extending obliquely toward the circumferential center jointly lock the needle tube 30.

[0065] It is understandable that the radial width of the connection portion 143 in the present application is greater than the radial width of the support portion 144, and does not limit the specific shapes of the connection portion 143 and the support portion 144. In addition, although the "diameter" is used for explanation, the "diameter" should be understood in a broad sense. The "diameter" only refers to the direction of the cross section of the connection portion 143 and the cross section of the support portion 144, and does not limit the shape of their cross sections. For example, in the present embodiment, the cross section of the connection portion 143 and the cross section of the support portion 144 are both circular. In other embodiments, the cross section of the connection portion 143 and the cross section of the support portion 144 can be elliptical, semicircular, triangular, square, etc.

[0066] Specifically, the limiting portion 145 has an inclined first abutting surface 146 and a second abutting surface 147, and the second abutting surface 147 is located on the side of the limiting portion 145 close to the circumferential center. The first abutting surface 146 is used to fit the inner wall of the second mounting hole 21 when the inner wall of the second mounting hole 21 presses against the limiting clip 14. The second abutting surface 147 is used to fit the outer surface of the needle tube 30 when the inner wall of the second mounting hole 21 presses against the limiting clip 14.

[0067] In some embodiments, the needle tube 30 includes a needle cap 31, a needle seat 32 and a needle 33, one end of the needle seat 32 is fixedly connected to the needle 33, and the other end is fixedly connected to the needle cap 31. After the needle tube 30 passes through the first mounting hole 11 and the second mounting hole 21, the needle cap 31 abuts against the end of the support seat 12 away from the connecting seat 13, the needle seat 32 is placed in the first mounting hole 11, and the needle 33 is partially placed in the first mounting hole 11 and then extends out of the dispensing needle assembly 100 through the second mounting hole 21.

[0068] For details, please refer to Figure 4The side of the connecting seat 13 close to the supporting seat 12 has a first surface 131 inclined toward the first mounting hole 11. In this embodiment, the first mounting hole 11 decreases from large to small in the direction from the supporting seat 12 to the connecting seat 13. One end of the needle seat 32 is placed in the first mounting hole 11 in the supporting seat 12, and the other end is placed in the first mounting hole 11 in the connecting seat 13, and the outer surface of the needle seat 32 is in contact with the first surface 131.

[0069] In some embodiments, the needle cap 31 includes a protrusion 311, which is used to abut against the inner wall of the first mounting hole 11 in the support seat 12 after the needle tube 30 is placed in the first mounting hole 11 and the second mounting hole 21 to prevent the needle tube 30 from sliding.

[0070] In some embodiments, the mounting seat 20 is provided with a first opening 22 and a second opening 23, the first opening 22 and the second opening 23 are connected to the second mounting hole 21, the first opening 22 is located at one end of the mounting seat 20 close to the dispensing seat 10, and the diameter of the first opening 22 is larger than the diameter of the second opening 23 and the diameter of the connecting seat 13. In this embodiment, the diameter of the second opening 23 is smaller than the diameter of the limiting portion 145. The diameter of the second mounting hole 21 decreases from large to small in the direction from the first opening 22 to the second opening 23. In this way, the connecting seat 13 and the limiting clip 14 pass through the first opening 22 to be placed in the second mounting hole 21. Moreover, since the diameter of the second opening 23 is smaller than the diameter of the limiting portion 145, when the user rotates the mounting base 20 to connect the mounting base 20 to the dispensing base 10, the limiting clamp 14 is located on the side of the second opening 23 close to the second mounting hole 21. When the limiting clamp 14 is subjected to the upward pressure of the inner wall of the second mounting hole 21, the multiple limiting portions 145 will move toward the circumferential center to lock the needle tube 30.

[0071] In other embodiments, since the limiting portion 145 extends obliquely from one end of the connecting portion 143 toward the circumferential center, the limiting portion 145 has an inclined first abutting surface 146. Therefore, the diameter of the second opening 23 can also be larger than the diameter of the end of the limiting portion 145 away from the connecting portion 143 and the diameter of the second opening 23 is smaller than the diameter of the connection between the limiting portion 145 and the connecting portion 143. At this time, when the limiting clip 14 is subjected to the abutting force of the inner wall of the second mounting hole 21 moving upward, the plurality of limiting portions 145 extending obliquely toward the circumferential center can also lock the needle tube 30 together.

[0072] Figures 1 to 5The dispensing needle assembly 100 shown, first, the needle tube 30 is passed through the first mounting hole 11, the protrusion 311 of the needle cap 31 abuts against the inner wall of the first mounting hole 11 in the support seat 12, and the outer surface of the needle seat 32 fits the inclined first surface 131 to prevent the needle tube 30 from sliding downward. Then, the needle tube 30 extending out of the dispensing seat 10 is passed through the second mounting hole 21. The mounting seat 20 is rotated to connect the mounting seat 20 to the dispensing seat 10. At the same time, during the process of the mounting seat 20 connecting the dispensing seat 10, part of the needle 33 extends out of the mounting seat 20, and when the limiting clip 14 is subjected to the upward pressure of the inner wall of the second mounting hole 21, the multiple limiting parts 145 move toward the circumferential center to lock the needle tube 30. The user can connect the mounting seat 20 to the dispensing seat 10 by rotating the mounting seat 20, so as to lock the needle tube 30 placed in the first mounting hole 11 and the second mounting hole 21 into the dispensing seat 10 and the mounting seat 20. The problem that the existing glue dispensing machine needs to manually calibrate whether the needle tube 30 is locked is avoided.

[0073] like Figure 5 and Figure 6 As shown, this embodiment also provides a glue supply device 200. Figure 1 and Figure 3 The glue supply device 200 includes a glue dispensing needle assembly 100 and a glue supply assembly 210. The glue dispensing seat 10 also includes a glue dispensing connector 16. One end of the glue dispensing connector 16 is fixedly connected to the glue dispensing seat 10, and the other end is connected to the glue supply assembly 210. A glue valve (not shown) is arranged in the glue supply assembly 210, and the glue is sequentially output from the glue valve, the glue supply assembly 210 and the needle tube 30 to the outside of the glue supply device 200.

[0074] The above implementation modes are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above preferred implementation modes, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A dispensing needle assembly, characterized in that: It includes a dispensing seat, a mounting seat and a needle tube, the mounting seat is detachably connected to the dispensing seat, the dispensing seat is provided with a first mounting hole, the dispensing seat includes a supporting seat, a connecting seat and a limiting clamp which are arranged in sequence, the first mounting hole passes through the supporting seat, the connecting seat and the limiting clamp, the limiting clamp is located on the side of the connecting seat close to the mounting seat, the mounting seat is provided with a second mounting hole, the first mounting hole and the second mounting hole are coaxially arranged, the needle tube passes through the first mounting hole and then extends out through the second mounting hole, the connecting seat and the limiting clamp are placed in the second mounting hole, and the inner wall of the second mounting hole abuts against the limiting clamp to lock the needle tube.

2. The dispensing needle assembly according to claim 1, characterized in that: The limit clamp defines a limit space, and the limit clamp includes a plurality of limit members, and the plurality of limit members are distributed along the circumference of the needle tube. The limit space is formed between the plurality of limit members, and the plurality of limit members are fixedly connected to the connecting seat. The limit space connects the first mounting hole and the second mounting hole, and the limit space is used for the needle tube to pass through. When the inner wall of the second mounting hole abuts against the limit clamp, the plurality of limit members move toward the circumferential center to lock the needle tube.

3. The dispensing needle assembly according to claim 2, characterized in that: The limiting member includes a connecting portion, a supporting portion and a limiting portion, wherein one end of the connecting portion is fixedly connected to the supporting portion, and the other end is fixedly connected to the limiting portion, an end of the supporting portion away from the connecting portion is fixedly connected to the connecting seat, and the limiting portion extends obliquely from one end of the connecting portion toward the circumferential center.

4. The dispensing needle assembly according to claim 3, characterized in that: The limiting portion has an inclined first abutting surface on one side away from the limiting space, and the first abutting surface abuts against an inner wall of the second mounting hole.

5. The dispensing needle assembly according to claim 3, characterized in that: The limiting portion has a second abutting surface facing the side of the adjacent limiting member, and the second abutting surface abuts against the outer surface of the needle tube.

6. The dispensing needle assembly according to claim 3, characterized in that: The radial width of the connecting portion is greater than the radial width of the supporting portion.

7. The dispensing needle assembly according to claim 3, characterized in that: The mounting seat is provided with a first opening and a second opening, the first opening and the second opening are connected to the second mounting hole, the first opening is located at one end of the mounting seat close to the dispensing seat, the diameter of the first opening is larger than the diameter of the second opening and the diameter of the connecting seat, and the diameter of the second opening is smaller than the diameter of the limiting portion.

8. The dispensing needle assembly according to claim 7, characterized in that: The diameter of the second mounting hole decreases from the first opening to the second opening.

9. The dispensing needle assembly according to claim 1, characterized in that: The outer wall of the connecting seat is provided with an external thread, the inner wall of the second mounting hole is provided with an internal thread, and the connecting seat is threadedly connected to the mounting seat.

10. A glue supply device, characterized in that: It includes a glue dispensing needle assembly and a glue supply assembly as described in any one of claims 1 to 9, the glue dispensing seat also includes a glue dispensing connector, the glue dispensing connector is connected to the glue supply assembly, a glue valve is provided in the glue supply assembly, and the glue is output from the glue valve, the glue supply assembly and the needle tube to the outside of the glue supply device in sequence.

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