CN117339844A

CN117339844A - Precise dispensing gun

Info

Publication number: CN117339844A
Application number: CN202311365974.5A
Authority: CN
Inventors: 薛万浩; 俞威
Original assignee: Shanghai Ligetai Medical Equipment Co ltd
Current assignee: Shanghai Ligetai Medical Equipment Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-01-05

Abstract

The invention discloses a precise dispensing gun, which comprises a gun body, a dispensing part, a driving assembly and a driving buffer assembly, wherein the dispensing part is configured to move in the gun body to realize dispensing; the driving assembly is in driving connection with the glue outlet piece and is configured to move relative to the gun body so as to drive the glue outlet piece to move; the driving buffer assembly is arranged between the driving assembly and the gun body, the driving buffer assembly comprises an elastic buffer piece, the fixed end of the elastic buffer piece is connected to one of the driving assembly and the gun body, and the other end of the elastic buffer piece is a buffer end and is abutted to the other one of the driving assembly and the gun body through elastic force; the driving assembly moves relative to the gun body so that the elastic buffer piece moves relative to the driving assembly or the gun body, and the buffer end of the elastic buffer piece generates friction force with the driving assembly or the gun body to prevent the driving assembly from moving relative to the gun body. The damping buffer effect can be obtained by moving the driving assembly, the moving stroke of the driving assembly can be better controlled, and the quantity of the glue extruded each time can be more conveniently controlled.

Description

Precise dispensing gun

Technical Field

The invention belongs to the technical field of dispensing guns, and particularly relates to a precise dispensing gun.

Background

In the rapid development of the modern production and manufacturing industry, the productivity and development innovation are continuously improved, and the types of products designed and produced are also more and more precise and complex. With the current development of production, more and more glues are also widely used in the manufacturing industry, such as epoxy glue, quick-drying glue, UV glue, silicone gel, hydrogel, etc., which are harmless to human body.

In automobile production, each loudspeaker and interior instrument all need the rubber coating installation to the outward appearance requirement is high, so need accurate trace point gum machine to mend the glue. Dispensing processes are also used in mobile phones, headphones, and some chips, and the dosage of glue is extremely strictly controlled. In medical instruments, surgical electrodes, radio frequency surgical knives, plasma cutting surgical instruments and the like are all required to be assembled by glue, but in parts such as headphones, surgical electrodes, chips, automobile interior instruments and the like, the operation space is limited, the shape is irregular, mechanical automation glue dispensing is difficult to realize, and a craftsman is required to repair manually.

However, in the prior art, accurate micro dispensing is difficult to realize, and workers need to frequently wipe the overflowed glue amount during operation, so that the quality of products is influenced, and the working efficiency is influenced.

Disclosure of Invention

In view of the problems in the background art, an object of the present invention is to provide a precision dispensing gun, including a gun body, a dispensing member configured to move within the gun body to achieve dispensing, a driving assembly and a driving buffer assembly; the driving assembly is in driving connection with the glue outlet piece and is configured to move relative to the gun body so as to drive the glue outlet piece to move;

the driving buffer assembly is arranged between the driving assembly and the gun body, the driving buffer assembly comprises an elastic buffer piece with elastic force, the fixed end of the elastic buffer piece is connected to one of the driving assembly and the gun body, the opposite other end is a buffer end, and the elastic buffer piece is abutted to the other one of the driving assembly and the gun body through the elastic force;

the driving assembly moves relative to the gun body so that the elastic buffer piece moves relative to the driving assembly or the gun body, and when the elastic buffer piece moves relatively, the buffer end of the elastic buffer piece and the driving assembly or the gun body generate friction force so as to prevent the driving assembly from moving relative to the gun body.

Preferably, the driving buffer assembly comprises a blocking buffer part, the blocking buffer part is arranged on one of the driving assembly and the gun body, which is abutted to the buffer end of the elastic buffer member, the blocking buffer part is positioned on the moving path of the buffer end of the elastic buffer member and is interfered with the movement of the blocking buffer part, and the elastic buffer member elastically contracts towards the fixed end of the elastic buffer member when the buffer end of the elastic buffer member and the blocking buffer part interfere with each other.

Preferably, the blocking buffer parts are provided with a plurality of blocking buffer parts, and the blocking buffer parts are sequentially arranged at intervals along the moving path of the buffer end of the elastic buffer part; the width dimension of the buffer end of the elastic buffer piece is larger than the minimum interval between the adjacent blocking buffer parts;

the buffer end of the elastic buffer piece is abutted with the blocking buffer part, and the buffer end of the elastic buffer piece can move between the blocking buffer parts adjacent to each other and abutted with the adjacent side of the blocking buffer part adjacent to each other.

Preferably, the blocking buffer part is a convex buffer hill.

Preferably, the elastic buffer member comprises a first elastic member and a first sliding member, wherein the fixed end of the first sliding member is slidably connected with the driving assembly or the gun body, and the first elastic member gives the elastic force for the first sliding member to slide towards the buffer end of the first sliding member.

Preferably, the fixed end of the first sliding part is slidably connected to the gun body, the first elastic part is arranged between the inner wall of the gun body and the first sliding part, and the buffer end of the first sliding part is abutted to the driving assembly.

Preferably, the gun body comprises a mounting shell and a glue storage cylinder which are connected with each other, the mounting shell is sleeved and mounted on the glue storage cylinder, and the first elastic piece and the first sliding piece are both arranged in the mounting shell;

the glue outlet piece is arranged in the glue storage barrel, and a piston is arranged at one end of the glue outlet piece, which is arranged in the glue storage barrel.

Preferably, the outer wall surface of the glue storage cylinder is provided with a convex scale mark.

Preferably, the gun comprises a linkage piece, wherein the linkage piece is arranged on one side of the gun body and is connected with the glue outlet piece, and the linkage piece is arranged in an extending manner along the moving direction of the glue outlet piece;

the driving assembly is in driving connection with the linkage piece, and drives the linkage piece and the glue outlet piece to move when the driving assembly moves relative to the gun body.

Preferably, the driving assembly is provided with a manual part, and the driving assembly is manually driven to move through the manual part.

Preferably, when the manual part is used for manually driving the driving assembly to move, the gun body is held by a hand and the manual part is driven by a thumb to drive the driving assembly to move.

Preferably, the glue outlet piece is defined to move so that the glue outlet direction of the gun body is a first direction, and the opposite direction is a second direction;

the linkage piece is provided with a driving groove extending along the first direction, a plurality of locking teeth are sequentially arranged on the groove wall of the first side of the driving groove at intervals along the first direction, a locking groove is formed between every two adjacent locking teeth, and a movable channel is formed on the second side of the driving groove;

the driving assembly comprises a second sliding piece and a locking piece, wherein the second sliding piece is connected with the linkage piece in a sliding way, one end of the locking piece is rotatably connected with the second sliding piece, the opposite other end is a locking end and is arranged in the driving groove, and the locking piece is configured to enable the locking end of the locking piece to be switched between the locking groove and the movable channel through rotating relative to the second sliding piece;

when the locking end is positioned in the locking groove and the second sliding piece moves towards the first direction, the locking end is matched with the locking groove to drive the linkage piece to move; the locking end is movable along the movable channel when positioned in the movable channel.

Preferably, the groove surface of the locking groove at one end facing the first direction is a locking surface recessed toward the first direction, the groove surface at one end facing the second direction is a guiding surface, and the guiding surface extends obliquely toward the second direction and the movable channel;

when the locking end is positioned in the locking groove and the second sliding piece moves towards the first direction, the locking end is matched with the locking surface to drive the linkage piece to move;

when the locking end is positioned in the locking groove and the second sliding piece moves towards the second direction, the locking end rotates into the movable channel through the guiding of the guiding surface, so that the locking end can move towards the second direction.

Preferably, the driving assembly includes a second elastic member connecting the second sliding member and the locking member, and the second elastic member gives an elastic force to the locking member to rotate a locking end thereof toward the locking groove.

Preferably, the locking piece comprises a connecting rod and a locking rod, one end of the connecting rod is rotatably connected with the second sliding piece, the opposite other end is the locking end and is provided with the locking rod, and the locking rod is arranged in the driving groove;

one end of the connecting rod, which is rotationally connected with the second sliding piece, is positioned at one side of the first side of the driving groove, and one end of the second elastic piece is connected with the lock rod.

By adopting the technical scheme, the invention has the following advantages and positive effects compared with the prior art:

1. according to the invention, the driving buffer assembly is arranged, so that the elastic buffer member moves relative to the driving assembly or the gun body, and friction force is generated between the buffer end of the elastic buffer member and the driving assembly or the gun body during relative movement so as to prevent the driving assembly from moving relative to the gun body, so that the damping buffer effect can be obtained when the driving assembly moves, the moving stroke of the driving assembly can be better controlled, and the quantity of glue extruded each time can be more conveniently controlled. Meanwhile, the problem that the driving assembly accidentally moves due to natural reasons such as gravity or misoperation and the like can be prevented through the damping buffering effect, if the driving assembly accidentally moves towards the glue outlet direction of the glue outlet piece, the glue overflow problem can be caused, and the problem that the use effect is affected due to rebound of the glue outlet piece can be caused due to reverse movement, and the glue overflow and rebound problems are effectively prevented through the damping buffering effect.

2. The driving buffer assembly comprises the blocking buffer part, the blocking buffer part is positioned on the moving path of the buffer end of the elastic buffer part and interferes with the movement of the blocking buffer part, the elastic buffer part elastically contracts towards the fixed end of the elastic buffer part when the buffer end of the elastic buffer part interferes with the blocking buffer part, on one hand, a better damping buffer effect can be obtained through the movement interference of the elastic buffer part and the blocking buffer part, on the other hand, the braking effect on the driving assembly can be enhanced, and the problem of overlarge instantaneous speed of the driving assembly caused by shaking hands and the like is prevented.

3. The width dimension of the buffer end of the elastic buffer piece is larger than the minimum distance between the adjacent blocking buffer parts, so that the buffer end of the elastic buffer piece can move between the adjacent blocking buffer parts and is abutted against the adjacent sides of the adjacent blocking buffer parts, namely, the two sides of the buffer end are tightly attached to the adjacent blocking buffer parts, so that the buffer end can be blocked and positioned by the adjacent blocking buffer parts, and the problem that the driving assembly overcomes the unexpected movement of friction force can be prevented. If the width dimension of the buffer end of the elastic buffer member is set to be equal to the minimum distance between the adjacent blocking buffer parts, so that the buffer end is abutted with the driving assembly, the requirement that two sides of the buffer end are tightly attached to the adjacent blocking buffer parts can be met, but the requirement on manufacturing precision is too high.

4. According to the invention, the manual driving assembly can be manually driven to move by arranging the manual part, single-hand operation can be realized, a worker can hold the precise dispensing gun of the invention by one hand, and the other hand holds the workpiece to perform dispensing operation, so that the operation is more stable.

5. When the locking end is positioned in the locking groove and the second sliding piece moves towards the first direction, the locking end is matched with the locking groove to drive the linkage piece to move, and the locking end can move along the locking end when positioned in the movable channel, namely the locking end can move towards the second direction in the movable channel, so that after the second sliding piece moves towards the first direction for a certain distance along with the locking end, the locking end can be rotated into the movable channel, then the second sliding piece moves towards the second direction for a certain distance along with the locking end, and then the locking end is rotated into the other locking groove to realize gear shifting operation, the locking end can be repeatedly moved back and forth to realize continuous movement of the glue outlet piece, the driving stroke is increased, and the device is more suitable for single-hand operation because the movable range of fingers is limited.

6. The groove surface of one end of the locking groove facing the first direction is a locking surface concave towards the first direction, the groove surface of one end facing the second direction is a guiding surface, and when the locking end is positioned in the locking groove and the second sliding piece moves towards the second direction, the locking end rotates into the movable channel through the guiding of the guiding surface, so that the locking end can move towards the second direction, and the locking end can be automatically driven to rotate into the movable channel by moving the second sliding piece during gear shifting. Meanwhile, the driving assembly further comprises a second elastic piece, the second elastic piece gives the locking piece an elastic force enabling the locking end of the locking piece to rotate towards the locking groove, when the gear is shifted, the locking end can automatically enter the locking groove through the elastic force of the second elastic piece after moving towards the second direction for a certain distance, gear shifting of the locking end can be automatically achieved through moving the second sliding piece, the locking end does not need to be broken by the other hand to rotate and shift, and one-hand gear shifting is achieved.

Drawings

The invention is described in further detail below with reference to the attached drawing figures, wherein:

FIG. 1 is an overall isometric view of the present invention;

FIG. 2 is a partial cross-sectional elevation view of the present invention;

FIG. 3 is a cross-sectional view of a drive buffer assembly of the present invention;

FIG. 4 is a side view of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 in accordance with the present invention;

FIG. 6 is a partial isometric view of the present invention;

FIG. 7 is a schematic view of the cooperation of the sliding sleeve, the locking rod, the tension spring and the connecting rod according to the present invention.

Reference numerals illustrate:

11. a glue storage cylinder; 111. a glue outlet; 112. a scale mark; 12. a mounting shell; 13. a needle; 14. a protective cap; 21. a spring; 22. a first slider; 221. a slide plate; 222. a buffer plate; 23. a buffer mound; 3. a push rod; 31. a piston; 4. a linkage member; 41. a driving groove; 42. a chute; 411. locking teeth; 412. a locking groove; 4121. a locking surface; 4122. a guide surface; 413. a movable channel; 5. a sliding sleeve; 51. a collar; 52. a slide rail rib; 53. a mounting ear; 6. a tension spring; 7. a connecting sheet; 8. a lock rod.

Detailed Description

The invention is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present invention will become more apparent from the following description. It is noted that the drawings are in a very simplified form and utilize non-precise ratios, and are intended to facilitate a convenient, clear, description of the embodiments of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Referring to fig. 1 to 7, the core of the present invention is to provide a precise dispensing gun for precise micro manual dispensing, although the fluid type automatic dispensing machine is widely used in the production of mass products, for example: pneumatic type point gum machine, motor type point gum machine etc. can be to some local quick point gum, but automatic point gum machine can not satisfy arbitrary position and all can realize automatic point gum, because the limitation in certain position can't realize automatic point gum production completely, there are some technology parts to need the production workman to do special manual operation accuracy point gum.

The precise dispensing gun comprises a gun body, a dispensing part, a driving assembly and a driving buffer assembly, wherein the dispensing part is configured to move in the gun body to realize dispensing; the driving assembly is in driving connection with the glue outlet piece, the driving assembly is used for driving the glue outlet piece to move, and the driving assembly is configured to move relative to the gun body so as to drive the glue outlet piece to move; the driving buffer component is arranged between the driving component and the gun body and is used for realizing damping buffer effect when the driving component moves relative to the gun body.

The driving buffer assembly comprises an elastic buffer member with elastic force, wherein the fixed end of the elastic buffer member is connected to one of the driving assembly and the gun body, and the opposite other end of the elastic buffer member is a buffer end and is abutted to the other one of the driving assembly and the gun body through the elastic force. The driving assembly moves relative to the gun body so that the elastic buffer piece moves relative to the driving assembly or the gun body, and when the elastic buffer piece moves relatively, the buffer end of the elastic buffer piece and the driving assembly or the gun body generate friction force to prevent the driving assembly from moving relative to the gun body, so that a damping buffer effect is realized.

The moving stroke of the driving assembly can be better controlled through the damping buffer effect, and the quantity of the glue extruded each time is more convenient to control. Meanwhile, the problem that the driving assembly accidentally moves due to natural reasons such as gravity or misoperation and the like can be prevented through the damping buffering effect, if the driving assembly accidentally moves towards the glue outlet direction of the glue outlet piece, the glue overflow problem can be caused, and the problem that the use effect is affected due to rebound of the glue outlet piece can be caused due to reverse movement, and the glue overflow and rebound problems are effectively prevented through the damping buffering effect.

The gun body comprises an installation shell 12 and a glue storage barrel 11 which are connected with each other, glue is stored in the glue storage barrel 11, a glue outlet 111 is formed in one end of the glue storage barrel 11, an installation shell 12 is arranged at the opposite end of the glue storage barrel 11, and the installation shell 12 is sleeved and installed on the glue storage barrel 11. In this embodiment, the glue outlet member is a push rod 3, one end of the push rod 3 is provided with a piston 31 and is in sliding and sealing connection with the glue storage barrel 11, and the other end extends out of the glue storage barrel 11. The glue outlet 111 is also provided with a needle 13, and the needle 13 is detachably connected with the glue outlet 111 through luer threads, so that the replacement of the existing market luer needle is more convenient and more widely applicable. When the push rod 3 moves, the piston 31 presses the glue in the glue storage cylinder 11, and the glue is discharged from the needle 13 through the glue outlet 111.

The needle 13 is also provided with a protective cap 14 for protecting the needle 13 from damage or adhesion of glue. The outer wall surface of the glue storage barrel 11 is provided with a convex scale mark 112, and the convex scale mark 112 can reflect the using amount of glue on one hand and play a role in skid resistance on the other hand.

In this embodiment, the fixed end of the elastic buffer member is connected to the mounting shell 12 of the gun body, and the buffer end abuts against the driving assembly, which may be opposite in other embodiments, which is not limited herein.

The drive buffer assembly of the present invention is further described below:

the elastic buffer member is not particularly limited in this embodiment, but preferably, the elastic buffer member includes a first elastic member and a first sliding member 22, the fixed end and the buffer end are respectively disposed at two ends of the first sliding member 22, the fixed end of the first sliding member 22 is slidably connected in the mounting shell 12, the first elastic member is disposed between the inner wall of the mounting shell 12 and the first sliding member 22, the buffer end of the first sliding member 22 abuts against the driving component, and the first elastic member gives the first sliding member 22 an elastic force towards the driving component.

The first elastic member is a spring 21 in this embodiment, but it is needless to say that other types of elastic members are also possible in other embodiments, and the present invention is not limited thereto.

In other embodiments, the elastic buffer member may be a rubber elastic pad, an air cushion, or the like with elasticity, or may be an elastic plate with bending elasticity, the length of the elastic plate is greater than the distance between the gun body and the driving assembly, and the elastic plate is bent and arranged and has one end abutted to the driving assembly by the elastic force generated by bending.

Preferably, the driving buffer assembly further includes a blocking buffer portion disposed on the driving assembly, the blocking buffer portion being located on a moving path of the buffer end of the first slider 22 and interfering with the movement thereof, and when the buffer end of the first slider 22 interferes with the blocking buffer portion, the first slider 22 slides toward the mounting case 12 against the elastic force of the spring 21.

The interference between the first slider 22 and the blocking buffer portion on the one hand enables better damping buffer effect, on the other hand can enhance the braking effect on the driving assembly, and the problem of excessive instantaneous speed of the driving assembly due to hand shake and the like is prevented.

The number of the blocking buffers is not particularly limited in this embodiment, but it is preferable that the blocking buffers are provided in plurality, and are sequentially spaced apart along the moving path of the buffer end of the first slider 22. The width dimension of the buffer end of the first slider 22 is greater than the minimum distance between the adjacent blocking buffer parts, the buffer end of the first slider 22 is abutted against the blocking buffer parts, and the buffer end of the first slider 22 can move between the adjacent blocking buffer parts and is abutted against the adjacent sides of the adjacent blocking buffer parts, that is to say, the two sides of the buffer end are tightly attached to the adjacent blocking buffer parts, so that the buffer end can be blocked and positioned by the adjacent blocking buffer parts, and the problem that the driving assembly overcomes the unexpected movement of friction force can be prevented. If the width dimension of the buffer end of the elastic buffer member is set to be equal to the minimum distance between the adjacent blocking buffer parts, so that the buffer end is abutted with the driving assembly, the requirement that two sides of the buffer end are tightly attached to the adjacent blocking buffer parts can be met, but the requirement on manufacturing precision is too high.

Further, the first sliding member 22 includes a sliding plate 221 and two buffer plates 222, the sliding plate 221 is slidably connected in the installation shell 12, the two buffer plates 222 are arranged on one surface of the sliding plate 221 facing the driving component at intervals, the other end of the buffer plate 222 is a buffer end and is abutted against the blocking buffer portion, that is to say, the first sliding member 22 is provided with two buffer ends, so that a better damping buffer effect can be obtained.

In this embodiment, the blocking buffer portion is specifically a protruding buffer bump 23, and the top of the buffer bump 23 and the buffer end of the first slider 22 have radians, so that when the first slider 22 interferes with the buffer bump 23, the two can smoothly slide relatively, and when the first slider 22 slides relatively, on one hand, the elastic force of the spring 21 is abutted against the buffer bump 23 to generate friction force so as to obtain a damping buffer effect, and on the other hand, the interference with the buffer bump 23 is used to obtain a damping buffer effect, that is, an effect similar to that of an automobile passing through a deceleration strip can be obtained.

The drive assembly of the present invention is further described below:

for convenience of description, the movement of the push rod 3 is defined such that the direction of the gun body for dispensing is a first direction, and the opposite direction is a second direction.

The gun also comprises a linkage piece 4 which is arranged on one side of the gun body and is connected with the push rod 3, and the linkage piece 4 is arranged in an extending way along the first direction. In this embodiment, the linkage member 4 and the push rod 3 are integrally formed, and the linkage member 4 and the push rod 3 are integrally formed into a U shape, however, in other embodiments, the linkage member 4 and the push rod 3 may be separately provided, which is not limited herein.

The driving component is in driving connection with the linkage piece 4, and drives the linkage piece 4 and the push rod 3 to move when the driving component moves relative to the gun body. The driving component is also provided with a manual part, and the driving component is manually driven to move through the manual part.

When the manual driving assembly is manually driven to move by the manual part, the glue storage cylinder 11 is held by a hand and the manual part is driven by the thumb to drive the driving assembly to move. The manual part in this embodiment is a collar 51, and in use the thumb penetrates into the collar 51.

By arranging the lantern ring 51, the manual driving assembly can be driven to move, one-hand operation can be realized, a worker can hold the precise dispensing gun of the invention by one hand, and the other hand holds a workpiece to perform dispensing operation, so that the operation is more stable.

The linkage 4 is provided with a driving groove 41 extending along a first direction, a plurality of locking teeth 411 are sequentially arranged on the groove wall of the first side of the driving groove 41 at intervals along the first direction, locking grooves 412 are formed between adjacent locking teeth 411, and a movable channel 413 is formed on the second side of the driving groove 41.

The driving assembly specifically includes a second sliding member and a locking member, the second sliding member is slidably connected to the linkage member 4, where the second sliding member is not specifically limited in this embodiment, but preferably, the second sliding member is a sliding sleeve 5, the sliding sleeve 5 is sleeved and slidably connected to the linkage member 4, the buffer bump 23 is disposed on a surface of the sliding sleeve 5 facing the first sliding member 22, and the collar 51 is disposed on a surface of the sliding sleeve 5 remote from the first sliding member 22. Specifically, two opposite outer walls of the linkage member 4 are respectively provided with a sliding groove 42 along a first direction, two opposite inner walls of the sliding sleeve 5 are respectively provided with a sliding rail rib 52 along the first direction, and the sliding rail ribs 52 are slidably connected in the sliding grooves 42. When in installation, the sliding sleeve 5 is sleeved into the linkage piece 4 from the open end of the linkage piece 4.

One end of the locking piece is rotatably connected to the sliding sleeve 5, the opposite end is a locking end and is arranged in the driving groove 41, and the locking piece is configured to enable the locking end of the locking piece to be switched between the locking groove 412 and the movable channel 413 by rotating relative to the sliding sleeve 5;

when the locking end is positioned in the locking groove 412 and the sliding sleeve 5 moves towards the first direction, the locking end is matched with the locking groove 412 to drive the linkage piece 4 to move; the locking end can move along the movable channel 413 when being positioned in the movable channel 413, that is to say, the locking end can move towards the second direction in the movable channel 413, so that after the second sliding piece moves towards the first direction by a certain distance along the locking end, the locking end can be rotated into the movable channel 413, then the second sliding piece moves towards the second direction by a certain distance along the locking end, and then the locking end is rotated into the other locking groove 412, so that gear shifting operation is realized, the locking end can be repeatedly moved back and forth to realize continuous movement of the glue outlet piece, the driving stroke is increased, and the one-hand operation is more suitable because the movement range of fingers is limited.

Further, the locking groove 412 has a groove surface facing one end in the first direction as a locking surface 4121 recessed in the first direction, and a groove surface facing one end in the second direction as a guide surface 4122, and the guide surface 4122 extends obliquely toward the second direction and the movable passage 413.

When the locking end is positioned in the locking groove 412 and the sliding sleeve 5 moves towards the first direction, the locking end cooperates with the locking surface 4121 to drive the linkage 4 to move; when the locking end is located in the locking groove 412 and the sliding sleeve 5 moves towards the second direction, the locking end rotates into the movable channel 413 through the guiding of the guiding surface 4122, so that the locking end can move towards the second direction.

Still further, the driving assembly further includes a second elastic member connecting the sliding sleeve 5 and the locking member, the second elastic member giving an elastic force to the locking member to rotate its locking end toward the locking groove 412.

When the locking end is located in the locking groove 412 and the second sliding member moves towards the second direction, the locking end rotates into the movable channel 413 through the guiding of the guiding surface 4122, so that the locking end can move towards the second direction, and the locking end can be automatically driven to rotate into the movable channel 413 through moving the second sliding member during gear shifting. Meanwhile, the driving assembly further comprises a second elastic piece, the second elastic piece gives the locking piece an elastic force for enabling the locking end of the locking piece to rotate towards the locking groove 412, so that the locking end can automatically enter the locking groove 412 through the elastic force of the second elastic piece after moving towards the second direction for a certain distance during gear shifting, gear shifting of the locking end can be automatically achieved through moving the second sliding piece, the locking end does not need to be manually broken by another hand to rotate for gear shifting, and one-hand gear shifting is achieved.

The locking member and the second elastic member are not particularly limited in this embodiment, but preferably, the locking member includes a connecting rod and a locking rod 8, one end of the connecting rod is rotatably connected to the sliding sleeve 5, the opposite end is a locking end and is rotatably connected to the locking rod 8, the locking rod 8 is disposed in the driving slot 41, the driving slot 41 is a through slot, and the locking rod 8 is disposed in the driving slot 41 in a penetrating manner. One end of the connecting rod, which is rotationally connected with the sliding sleeve 5, is located at one side of the first side of the driving groove 41, the second elastic piece is a tension spring 6, one end of the tension spring 6 is connected with the lock rod 8, and the other end of the tension spring is connected with one side, far away from the movable channel 413, of the sliding sleeve 5, that is, the tension spring 6 is obliquely arranged to pull the lock rod 8 to the lock groove 412.

The connecting rod specifically comprises two connecting pieces 7 which are arranged in parallel, a mounting lug 53 is arranged on the sliding sleeve 5 in a protruding mode, the mounting lug 53 is arranged between the two connecting pieces 7, the two connecting pieces 7 and the mounting lug 53 are connected through a rotating shaft, and the lock rod 8 penetrates through the other ends of the two connecting pieces 7.

The working process of the invention is further described below:

when the glue is needed to be applied, the glue storage cylinder 11 is held by four fingers, the thumb penetrates into the sleeve ring 51, then the thumb moves downwards to drive the sliding sleeve 5 to move downwards, and the matching sliding sleeve 5 of the locking surface 4121 at the lower end of the locking rod 8 and the locking groove 412 drives the linkage rod and the push rod 3 to move downwards, so that the push rod 3 extrudes the glue in the glue storage cylinder 11 through the piston 31, and the glue is discharged from the needle head 13 through the glue outlet 111.

When the sliding sleeve 5 moves downwards, the first sliding piece 22 is abutted against the buffer hills 23 through the elastic force of the spring 21 to generate friction force, and simultaneously interferes with the buffer hills 23, and the first sliding piece 22 slides away from the buffer hills 23 against the elastic force of the spring 21, that is to say, the first sliding piece 22 continuously slides in a fluctuating manner so as to enable the sliding sleeve 5 to obtain a damping and buffering effect.

When the thumb moves downwards to exceed the joint movement range, the thumb moves upwards to drive the sliding sleeve 5 to move upwards for gear shifting. When the sliding sleeve 5 moves upwards, the sliding sleeve 5 drives the lock rod 8 to move upwards, the lock rod 8 is firstly contacted with the guide surface 4122 at the upper end of the lock groove 412, the lock rod 8 slides into the movable channel 413 relative to the sliding sleeve 5 through the guide of the guide surface 4122, and when the lock rod 8 moves upwards to the position of the lock groove 412 above in the movable channel 413, the tension spring 6 drives the lock rod 8 to rotate into the lock groove 412, so that gear shifting is realized. Then the sliding sleeve 5 moves downwards again, during the downward movement, the sliding sleeve 5 firstly drives the connecting rod and the lock rod 8 to rotate relative to the connecting rod, after a certain stroke of downward movement, the lock rod 8 can rotate into the movable channel 413 again due to the triangle principle, the lock rod 8 is pulled back into the lock groove 412 by the tension spring 6 again after the downward movement, and finally the lock rod 8 is matched with the locking surface 4121 at the lower end of the lock groove 412 again to drive the linkage rod to move downwards. Repeatedly drives the sliding sleeve 5 to slide up and down, and can drive the push rod 3 to continuously move out glue.

When the glue is used up, the glue bottle to be used is opened when the glue needs to be refilled in the glue storage barrel 11, the large-diameter needle head 13 is replaced and stretches into the glue bottle, the push rod 3 is pulled upwards to supplement and extract the glue, and the needle head 13 for dispensing is replaced again after the supplement is finished.

According to the invention, the driving mode is optimized, the air cylinder is not arranged, the problem that glue automatically overflows when the air cylinder drives no operation is solved, and meanwhile, the volume is small and the use cost is lower. The whole adopts a semi-automatic dispensing mode to improve the existing production process, and is convenient for production operation of staff.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is within the scope of the appended claims and their equivalents to fall within the scope of the invention.

Claims

1. The precise dispensing gun is characterized by comprising a gun body, a dispensing piece, a driving assembly and a driving buffer assembly, wherein the dispensing piece is configured to move in the gun body to realize dispensing; the driving assembly is in driving connection with the glue outlet piece and is configured to move relative to the gun body so as to drive the glue outlet piece to move;

2. The precision dispensing gun of claim 1, wherein the drive buffer assembly comprises a blocking buffer portion disposed on one of the drive assembly and the gun body in abutment with the buffer end of the elastic buffer member, the blocking buffer portion being disposed on the path of movement of the buffer end of the elastic buffer member and interfering therewith, the elastic buffer member elastically contracting toward its fixed end when the buffer end of the elastic buffer member interferes with the blocking buffer portion.

3. The precise dispensing gun according to claim 2, wherein a plurality of blocking buffer parts are provided, and are sequentially arranged at intervals along the moving path of the buffer end of the elastic buffer part; the width dimension of the buffer end of the elastic buffer piece is larger than the minimum interval between the adjacent blocking buffer parts;

4. The precision dispensing gun of claim 2, wherein the blocking buffer is a raised buffer dome.

5. The precision dispensing gun of claim 1, wherein the elastic buffer comprises a first elastic member and a first sliding member, the fixed end of the first sliding member is slidably connected to the driving assembly or the gun body, and the first elastic member gives the first sliding member an elastic force sliding toward the buffer end thereof.

6. The precision dispensing gun of claim 5, wherein the fixed end of the first slider is slidably connected to the gun body, the first elastic member is disposed between the inner wall of the gun body and the first slider, and the buffer end of the first slider abuts against the driving assembly.

7. The precise dispensing gun according to claim 6, wherein the gun body comprises a mounting shell and a glue storage barrel which are connected with each other, the mounting shell is sleeved on the glue storage barrel, and the first elastic piece and the first sliding piece are both arranged in the mounting shell;

8. The precise dispensing gun of claim 7, wherein the outer wall surface of the glue storage barrel is provided with convex scale marks.

9. The precise dispensing gun according to claim 1, comprising a linkage member arranged on one side of the gun body and connected with the dispensing member, wherein the linkage member extends along the movement direction of the dispensing member;

10. The precision dispensing gun of claim 9, wherein the drive assembly is provided with a manual portion by which the drive assembly is manually driven to move.

11. The precision dispensing gun of claim 10, wherein the manual portion is manually moved by the manual portion to hold the gun body by hand and the manual portion is manually moved by thumb to drive the driving assembly.

12. The precision dispensing gun of claim 9, wherein the dispensing member is defined to move such that the gun body is dispensing in a first direction and the opposite direction is in a second direction;

13. The precision dispensing gun of claim 12, wherein the slot surface of the locking slot at one end facing the first direction is a locking surface recessed toward the first direction, and the slot surface at one end facing the second direction is a guiding surface extending obliquely toward the second direction and the movable channel;

14. The precision dispensing gun of claim 13, wherein the drive assembly includes a second resilient member connecting the second slide member and the locking member, the second resilient member imparting a resilient force to the locking member that rotates its locking end toward the locking slot.

15. The precise dispensing gun according to claim 14, wherein the locking member comprises a connecting rod and a locking rod, one end of the connecting rod is rotatably connected to the second sliding member, the opposite end is the locking end and is provided with the locking rod, and the locking rod is arranged in the driving groove;