Glue dispenser

Abstract

The utility model discloses a glue dispenser which comprises a glue barrel, a needle head and a flow limiting assembly. The glue barrel comprises a barrel body used for containing glue. The needle head is arranged at one end of the cylinder body and is used for outputting glue for dispensing; the flow limiting assembly is arranged in the barrel and located at the end, close to the needle head, of the barrel, the flow limiting assembly comprises a first flow limiting piece, a second flow limiting piece and a filter screen which are arranged in the axial direction of the barrel, the first flow limiting piece and the second flow limiting piece are provided with a first flow limiting hole and a second flow limiting hole respectively, and the second flow limiting piece can rotate relative to the first flow limiting piece; the second flow limiting piece is matched with the first flow limiting piece to adjust the flow speed of the glue passing through the flow limiting assembly. According to the glue dispenser, the second flow limiting piece is arranged to be matched with the first flow limiting piece during rotation to adjust the flow speed of glue passing through the flow limiting assembly, the function of accurately controlling the flow speed of the glue is achieved, and therefore the phenomenon that the glue is accumulated on a product due to the uneven flow speed when output from a needle head can be effectively avoided; and therefore, the dispensing quality is improved, and glue waste is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of glue dispensing mechanisms, and in particular to a glue dispenser. Background Art

[0002] At present, when dispensing glue on products, a needle tube is usually used for dispensing. However, it is difficult to control the flow rate of glue when dispensing glue with a needle tube, so that glue is easily accumulated on the product, affecting the dispensing quality and easily causing glue waste. Utility Model Content

[0003] In view of the above, it is necessary to propose a glue dispenser to improve the glue dispensing quality and reduce glue waste.

[0004] An embodiment of the present application provides a glue dispenser, including a glue cartridge, a needle and a current limiting assembly; the glue cartridge includes a cylinder for storing glue; the needle is arranged at one end of the cylinder, for outputting the glue for dispensing; the current limiting assembly is arranged in the cylinder and is located at one end of the cylinder close to the needle, the current limiting assembly includes a first current limiting member, a second current limiting member and a filter screen arranged along the axial direction of the cylinder, the first current limiting member and the second current limiting member are respectively provided with a first current limiting hole and a second current limiting hole, the second current limiting member can rotate relative to the first current limiting member, and the second current limiting member is used to cooperate with the first current limiting member to adjust the flow rate of the glue through the current limiting assembly.

[0005] The above-mentioned glue dispenser realizes the function of accurately controlling the flow rate of glue by providing the first flow limiting hole and the second flow limiting hole for glue to pass through on the first flow limiting member and the second flow limiting member, and arranging the second flow limiting member to cooperate with the first flow limiting member to adjust the flow rate of glue passing through the flow limiting component when rotating, thereby effectively avoiding the accumulation of glue on the product due to uneven flow rate when the glue is output from the needle, which is beneficial to improving the quality of glue dispensing and reducing glue waste. In addition, by arranging a filter screen, the uniformity of glue passing through the flow limiting component can be further improved, and the filter screen can also filter impurities in the glue, reducing the probability of needle clogging, which is further beneficial to improving the quality of glue dispensing.

[0006] In some embodiments, a side wall of the cylinder at one end close to the needle tip is provided with a limiting hole extending along the circumference of the cylinder, the second flow limiting member includes a flow limiting plate and a driving protrusion protruding from the periphery of the flow limiting plate, the second flow limiting hole is provided in the flow limiting plate, the driving protrusion passes through the limiting hole and extends to the outside of the cylinder, and the driving protrusion is used to drive the flow limiting plate to rotate relative to the first flow limiting member under the action of external force.

[0007] In some embodiments, a rotation scale is provided on the outer side wall of the cylinder, and the rotation scale is located on one side of the limiting hole and directly opposite to the dialing protrusion.

[0008] In some embodiments, there are multiple first flow limiting holes and multiple second flow limiting holes, and the multiple first flow limiting holes and the second flow limiting holes are respectively arranged at circumferential intervals along the first flow limiting member and the flow limiting plate, and the second flow limiting member cooperates with the first flow limiting member to adjust the flow rate of the glue passing through the flow limiting component to a minimum of zero.

[0009] In some embodiments, the flow limiting assembly also includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are spaced apart on the inner side of one end of the cylinder close to the needle, and the first sealing ring abuts against the side of the first flow limiting member facing away from the flow limiting plate, and the second sealing ring abuts against the side of the flow limiting plate facing away from the first flow limiting member.

[0010] In some embodiments, the rubber cylinder also includes a first covering piece and a second covering piece; the first covering piece is covered on one end of the cylinder body, and the needle is arranged on the first covering piece; the second covering piece is covered on the other end of the cylinder body, and the first covering piece and the second covering piece are used to close the two ends of the cylinder body.

[0011] In some embodiments, an air inlet hole is opened on the side wall of the cylinder at one end close to the second cover part, and the dispenser also includes an air valve assembly, a piston assembly and an arc-shaped pressure rod; the air valve assembly is connected to the air inlet hole for opening or closing the air inlet hole; the piston assembly is slidably disposed in the cylinder and extends out of the second cover part; the arc-shaped pressure rod is rotatably disposed at one end of the cylinder close to the second cover part, and the arc-shaped pressure rod is respectively abutted against the air valve assembly and the piston assembly, and the arc-shaped pressure rod is used to drive the air valve assembly to open the air inlet hole, and to drive the piston assembly to move toward the first cover part.

[0012] In some embodiments, the air valve assembly includes a closing member and a closing elastic member; the closing member includes a sliding portion and a closing member, the sliding portion slides through the air inlet and extends into the cylinder, the closing member is arranged at one end of the sliding portion located in the cylinder, the closing member and the sliding portion are coaxially arranged and the size of the cross-section of the closing member is larger than the size of the cross-section of the sliding member, and the end of the sliding portion away from the closing member abuts against the arc-shaped pressure rod; the closing elastic member is sleeved on the sliding portion, and the two ends of the closing elastic member are respectively connected to the air inlet and the end of the sliding portion away from the closing member, the closing elastic member is used to drive the closing member to close the air inlet through the sliding portion, and the sliding portion is used to drive the closing member to open the air inlet under the drive of the arc-shaped pressure rod.

[0013] In some embodiments, the piston assembly includes a piston head and a push rod; the piston head is slidably disposed in the cylinder and is located at one end of the cylinder close to the second covering member; the push rod passes through the second covering member and is connected to the piston head, and the end of the push rod away from the piston head abuts against the arc pressure rod, and the push rod is used to drive the piston head to move toward the first covering member under the drive of the arc pressure rod.

[0014] In some embodiments, the dispenser also includes a reset elastic member, which is sleeved on the push rod, and the two ends of the reset elastic member are respectively connected to the second covering member and the end of the push rod away from the piston head, and the reset elastic member is used to drive the push rod and the piston head to reset when the arc pressure rod is disengaged from the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the glue dispenser provided in an embodiment of the present application.

[0016] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the dispenser shown.

[0017] Figure 3 yes Figure 1 The shown dispensing device is a cross-sectional view along the III-III direction.

[0018] Figure 4 yes Figure 3 A partial enlarged view of area A.

[0019] Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the barrel in the dispenser is shown.

[0020] Main component symbols

[0021] Dispenser 100

[0022] Rubber cartridge 10

[0023] Cylinder 11

[0024] Limit hole 111

[0025] Air Inlet 112

[0026] Abutting protruding ring 113

[0027] Rotate scale 114

[0028] Mounting ring groove 1131

[0029] The first cover member 12

[0030] Mounting hole 121

[0031] The second cover 13

[0032] Needle 20

[0033] Current limiting component 30

[0034] The first flow limiting element 31

[0035] The first flow restriction hole 311

[0036] The second flow limiting element 32

[0037] Current limiting chip 321

[0038] The second flow limiting hole 3211

[0039] Toggle protrusion 322

[0040] Filter 33

[0041] First sealing ring 34

[0042] Second sealing ring 35

[0043] Air valve assembly 40

[0044] Closure 41

[0045] Sliding portion 411

[0046] Closure section 412

[0047] Closing elastic member 42

[0048] The first contact pin 43

[0049] Piston assembly 50

[0050] Piston head 51

[0051] Putter 52

[0052] Reset elastic member 60

[0053] The second contact pin 70

[0054] Arc pressure rod 80

[0055] Pressing protrusion 81 DETAILED DESCRIPTION

[0056] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0057] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0058] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Some embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0059] See also Figure 1 and Figure 2 An embodiment of the present application provides a glue dispenser 100 , including a glue cartridge 10 , a needle 20 and a current limiting assembly 30 .

[0060] The glue cartridge 10 includes a cylinder body 11 for storing glue; a needle head 20 is disposed at one end of the cylinder body 11, and the needle head 20 is used to output glue for dispensing.

[0061] The flow limiting assembly 30 is arranged in the cylinder 11 and is located at one end of the cylinder 11 close to the needle 20. The flow limiting assembly 30 includes a first flow limiting member 31, a second flow limiting member 32 and a filter screen 33 arranged along the axial direction of the cylinder 11. The first flow limiting member 31 and the second flow limiting member 32 are respectively provided with a first flow limiting hole 311 and a second flow limiting hole 3211 for allowing glue to pass through. The second flow limiting member 32 can rotate relative to the first flow limiting member 31. The second flow limiting member 32 is used to cooperate with the first flow limiting member 31 to adjust the flow rate of the glue passing through the flow limiting assembly 30. The second flow limiting member 32 is stacked with the first flow limiting member 31 and is rotatably connected to the first flow limiting member 31. The second flow limiting member 32 closes at least part of the first flow limiting hole 311 when rotating to limit the flow rate of the glue passing through the first flow limiting hole 311. The filter 33 is arranged on the first flow limiting member 31 and shields the first flow limiting hole 311. The filter 33 limits the flow rate of the glue passing through the first flow limiting hole 311 and filters impurities in the glue. The filter 33 can be selected according to the viscosity of the glue and the size of the impurities. When the viscosity of the glue is high and the size of the impurities is large, a filter 33 with a smaller density can be selected. When the viscosity of the glue is low and the size of the impurities is small, a filter 33 with a larger density can be selected.

[0062] During the glue dispensing process of the glue dispenser 100 of the embodiment of the present application, the glue flows toward the needle 20 through the second flow limiting hole 3211 and the first flow limiting hole 311. The filter 33 can limit the flow rate of the glue through the first flow limiting hole 311 and filter the impurities in the glue, which is beneficial to improve the uniformity of the glue output from the needle 20 and reduce the probability of impurities in the glue clogging the needle 20. In addition, when there are bubbles in the glue, the bubbles will be divided into tiny bubbles by the filter 33, which is convenient for discharging the bubbles to avoid affecting the glue dispensing quality. When it is necessary to adjust the flow rate of the glue through the flow limiting component 30, the area of ​​the first flow limiting hole 311 closed by the second flow limiting component 32 can be adjusted by rotating the second flow limiting member 32 to adjust the flow rate of the glue through the first flow limiting hole 311. When the glue dispensing is completed, the second flow limiting member 32 can be rotated to completely close the first flow limiting hole 311 to prevent the glue from flowing toward the needle 20 through the first flow limiting hole 311.

[0063] In this embodiment, the second flow limiting member 32 is arranged on the side of the first flow limiting member 31 away from the needle 20. Of course, in some other embodiments, the second flow limiting member 32 can also be arranged on the side of the first flow limiting member 31 facing the needle 20, and can also close at least a part of the first flow limiting hole 311 when rotating, so as to achieve the purpose of adjusting the flow rate of the glue through the flow limiting component 30. The embodiment of the present application does not make specific limitations on this.

[0064] In this embodiment, the filter 33 is arranged on the side of the first flow limiting member 31 facing the second flow limiting member 32. In some other embodiments, the filter 33 can also be arranged on the side of the first flow limiting member 31 away from the second flow limiting member 32, or the filter 33 can also be arranged only in the first flow limiting hole 311. As long as the filter 33 can cover the first flow limiting hole 311, the embodiment of the present application does not make any specific limitation on this.

[0065] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, the rubber cylinder 10 further includes a first cover 12 and a second cover 13. The first cover 12 is covered at one end of the cylinder 11, and the needle 20 is disposed on the first cover 12 and is disposed at one end of the cylinder 11 through the first cover 12; the second cover 13 is covered at the other end of the cylinder 11, and the first cover 12 and the second cover 13 are used to seal the two ends of the cylinder 11, thereby preventing the glue from overflowing from the cylinder 11 and reducing the probability of the glue solidifying due to the continuous entry of external air into the cylinder 11.

[0066] In this embodiment, the first cover 12 and the second cover 13 are respectively threadedly connected to the two ends of the barrel 11, so that the first cover 12 and the second cover 13 can be easily disassembled. In this embodiment, the first cover 12 is conical, and a mounting hole 121 is provided at one end of the first cover 12 away from the barrel 11, and the needle 20 is connected to the mounting hole 121, so that the glue can quickly converge to the needle 20 through the first cover 12, and it is convenient to replace needles 20 of different specifications when dispensing glue.

[0067] In some other embodiments, the needle 20 may also be an integral structure with the first covering member 12, thereby reducing the probability of glue overflowing from the connection between the needle 20 and the first covering member 12. When the needle 20 is replaced, the first covering member 12 is also replaced at the same time. This embodiment of the present application does not specifically limit this.

[0068] In this embodiment, a limiting hole 111 extending along the circumference of the cylinder 11 is formed on the side wall of one end of the rubber cylinder 10 close to the needle 20. The second flow limiting member 32 includes a flow limiting plate 321 and a toggle protrusion 322 protruding from the periphery of the flow limiting plate 321. The flow limiting plate 321 is arranged in the cylinder 11 and is rotatably connected to the first flow limiting member 31. The second flow limiting hole 3211 is formed in the flow limiting plate 321. The toggle protrusion 322 extends through the limiting hole 111 to the outside of the cylinder 11. The toggle protrusion 322 is used to drive the flow limiting plate 321 to rotate relative to the first flow limiting member 31 under the action of external force, so that the flow limiting plate 321 closes at least a portion of the first flow limiting hole 311. In this way, it is convenient to apply force to the toggle protrusion 322 to adjust the flow rate of the glue through the first flow limiting hole 311.

[0069] In some other embodiments, when the size of the first cover member 12 permits, the limiting hole 111 can also be opened on the side wall of the first cover member 12 of the rubber cylinder 10. Correspondingly, the first flow limiting member 31 and the flow limiting sheet 321 are both arranged on the inner side of the first cover member 12. The embodiments of the present application do not make specific limitations on this.

[0070] In this embodiment, the outer wall of the cylinder 11 is provided with a rotation scale 114, and the rotation scale 114 is located on one side of the limiting hole 111 and directly opposite to the toggle protrusion 322. The rotation scale 114 is used to indicate the different gears of the toggle protrusion 322 driving the limiting plate 321 to adjust the flow rate of the glue through the first limiting hole 311. For example, the rotation scale 114 can include 7 gears, namely, C gear, 1 gear, 2 gear, 3 gear, 4 gear, 5 gear and 6 gear. The C gear indicates that the first limiting hole 311 is completely closed, and the 1 gear, 2 gear, 3 gear, 4 gear, 5 gear and 6 gear indicate that the flow rate of the glue through the first limiting hole 311 increases in sequence. In this way, it is convenient to quickly and accurately adjust the flow rate of the glue through the first limiting hole 311 quantitatively, wherein the lowest flow rate can be adjusted to zero.

[0071] In this embodiment, the number of the toggle protrusions 322 and the limiting holes 111 can be multiple, and the multiple limiting holes 111 are arranged at intervals along the circumference of the cylinder 11. The multiple toggle protrusions 322 are arranged at intervals on the periphery of the current limiting plate 321 and correspond one by one to the multiple limiting holes 111 respectively. The multiple toggle protrusions 322 respectively pass through the corresponding limiting holes 111 and extend to the outside of the cylinder 11, thereby supporting the current limiting plate 321.

[0072] In some other embodiments, when there is only one driving protrusion 322, a supporting groove (not shown) may be provided on the inner wall of the cylinder 11 to support the current limiting plate 321, and this embodiment of the present application does not specifically limit this.

[0073] In this embodiment, the first flow limiting member 31 and the flow limiting plate 321 are both circular, the first flow limiting member 31 has a plurality of first flow limiting holes 311, the flow limiting plate 321 has a plurality of second flow limiting holes 3211, the plurality of first flow limiting holes 311 are arranged at intervals along the circumference of the first flow limiting member 31, the plurality of second flow limiting holes 3211 are arranged at intervals along the circumference of the flow limiting plate 321, and the plurality of second flow limiting holes 3211 correspond to the plurality of first flow limiting holes 311 one by one, so as to facilitate The glue flows toward the needle 20 through the multiple first flow limiting holes 311 and the multiple second flow limiting holes 3211. When the flow limiting plate 321 closes at least part of the multiple first flow limiting holes 311, the multiple second flow limiting holes 3211 are offset from the multiple first flow limiting holes 311, thereby facilitating simultaneous adjustment of the flow rate of the glue through the multiple first flow limiting holes 311, and enabling the second flow limiting member 32 to cooperate with the first flow limiting member 31 to adjust the flow rate of the glue through the flow limiting assembly 30 to a minimum of zero.

[0074] In this embodiment, the current limiting component 30 further includes a first sealing ring 34 and a second sealing ring 35, which are arranged at intervals on the inner side of the end of the barrel 11 close to the needle 20, and the first sealing ring 34 abuts against the side of the first current limiting member 31 away from the current limiting plate 321, and the second sealing ring 35 abuts against the side of the current limiting plate 321 away from the first current limiting member 31. By providing the first sealing ring 34 and the second sealing ring 35, the probability of glue passing through the peripheral side of the first current limiting member 31 and the current limiting plate 321 can be reduced, thereby facilitating the improvement of the accuracy of the first current limiting member 31 and the current limiting plate 321 in cooperating to limit the flow rate of the glue. In addition, the second sealing ring 35 can also seal the side where the toggle protrusion 322 is connected to the corresponding limiting hole 111, thereby facilitating the reduction of the probability of glue overflowing from the limiting hole 111.

[0075] In some other embodiments, a third sealing ring (not shown) may also be provided between the first flow limiting member 31 and the flow limiting plate 321, so as to seal the other side where the pushing protrusion 322 is connected to the corresponding limiting hole 111, thereby facilitating further reducing the probability of glue overflowing from the limiting hole 111. The embodiments of the present application do not make specific limitations on this.

[0076] See also Figure 3 , Figure 4 and Figure 5 In this embodiment, the inner wall of the cylinder 11 is provided with an abutting protruding ring 113 extending radially toward the middle of the cylinder 11, and the abutting protruding ring 113 is located on the side of the flow limiting piece 321 away from the first flow limiting member 31, and the abutting protruding ring 113 is provided with an installation ring groove 1131 on the side facing the flow limiting piece 321, and the second sealing ring 35 is provided in the installation ring groove 1131, and the installation ring groove 1131 can limit the second sealing ring 35 from being separated from the flow limiting piece 321. In this way, by providing the abutting protruding ring 113 and providing the installation ring groove 1131 on the abutting protruding ring 113, it is convenient to install the second sealing ring 35 and it is beneficial to improve the sealing effect of the second sealing ring 35.

[0077] In this embodiment, the first cover part 12 extends into the cylinder body 11 and is threadedly connected to the cylinder body 11, and the first cover part 12 abuts against the first sealing ring 34. The first cover part 12 presses the first sealing ring 34 on the side of the first flow limiting part 31 away from the flow limiting plate 321, thereby facilitating the installation of the first sealing ring 34, and the first sealing ring 34 can also seal the connection between the first cover part 12 and the cylinder body 11, which is beneficial to reduce the probability of glue overflowing from the connection between the first cover part 12 and the cylinder body 11.

[0078] Please refer again Figure 1 , Figure 2 and Figure 3In this embodiment, an air inlet hole 112 is formed on the side wall of the cylinder 11 at one end close to the second cover 13, and the glue dispenser 100 further includes an air valve assembly 40, a piston assembly 50 and an arc-shaped pressure rod 80. The air valve assembly 40 is connected to the air inlet hole 112, and the air valve assembly 40 is used to open or close the air inlet hole 112; the piston assembly 50 is slidably disposed in the cylinder 11 and extends out of the second cover 13; the arc-shaped pressure rod 80 is rotatably disposed at one end of the cylinder 11 close to the second cover 13, and the arc-shaped pressure rod 80 is respectively in contact with the air valve assembly 40 and the piston assembly 50, and the arc-shaped pressure rod 80 is used to drive the air valve assembly 40 to open the air inlet hole 112, and to drive the piston assembly 50 to move toward the first cover 12.

[0079] Since the first cover 12 and the second cover 13 seal the two ends of the cylinder 11, the rubber cylinder 10 is in a sealed state, and the glue moves toward the needle 20, which reduces the air pressure inside the cylinder 11, so that the glue will not be discharged through the needle 20. When the air inlet 112 is opened, the air pressure inside the cylinder 11 is kept consistent with the external air pressure, and the glue can be discharged through the needle 20 under its own gravity. In addition, before dispensing, the bubbles in the glue will affect the quality of dispensing. Therefore, the glue removal operation needs to be performed before dispensing. When there are fewer bubbles in the glue discharged by the needle 20, the dispensing operation can be performed. By setting an arc pressure rod 80 to abut and drive the air valve assembly 40 and the piston assembly 50, when a glue removal operation is required, the arc pressure rod 80 is pushed so that the arc pressure rod 80 squeezes the piston assembly 50 and moves toward the first cover member 12. At this time, the arc pressure rod 80 is disengaged from the air valve assembly 40, the air valve assembly 40 closes the air inlet hole 112, and the piston assembly 50 increases the air pressure in the cylinder 11, thereby facilitating the glue removal operation. When a glue dispensing operation is required, the arc pressure rod 80 is pressed to drive the air valve assembly 40 to open the air inlet hole 112. At this time, the arc pressure rod 80 is disengaged from the piston assembly 50, and the air pressure inside and outside the cylinder 11 is kept consistent, thereby facilitating the glue dispensing operation.

[0080] In this embodiment, the air valve assembly 40 includes a sealing member 41 and a sealing elastic member 42. The sealing member 41 includes a sliding portion 411 and a sealing portion 412. The sliding portion 411 slides through the air inlet 112 and extends into the cylinder 11. The sealing portion 412 is arranged at one end of the sliding portion 411 located in the cylinder 11. The sealing portion 412 is coaxially arranged with the sliding portion 411 and the size of the cross section of the sealing portion 412 is larger than the size of the cross section of the sliding portion 411. The end of the sliding portion 411 away from the sealing portion 412 abuts against the arc-shaped pressure rod 80. The sealing elastic member 42 is sleeved on the sliding portion 411, and the two ends of the sealing elastic member 42 are respectively connected to the air inlet 112 and the end of the sliding portion 411 away from the sealing portion 412. The sealing elastic member 42 is used to drive the sealing portion 412 to close the air inlet 112 through the sliding portion 411, and the sliding portion 411 is used to drive the sealing portion 412 to open the air inlet 112 under the drive of the arc-shaped pressure rod 80. Among them, the sliding part 411 is cylindrical, the closing part 412 is circular, and the closing elastic member 42 can be a spring. Under normal conditions, the closing elastic member 42 drives the closing part 412 through the sliding part 411 to abut against one end of the air inlet 112 located in the cylinder 11, and the closing part 412 closes the air inlet 112 to limit the gas from entering the cylinder 11. When the arc-shaped pressure rod 80 squeezes the sliding part 411 under the action of external force, the closing part 412 moves away from the air inlet 112 under the drive of the sliding part 411, and the closing part 412 opens the air inlet 112 and the gas can enter the cylinder 11 through the air inlet 112. In this way, by setting the air valve assembly 40 to include the closing member 41 and the closing elastic member 42, the structure is simple and it is conducive to improving the accuracy of closing and opening the air inlet 112.

[0081] In this embodiment, the air valve assembly 40 also includes a first abutment pin 43, the air inlet hole 112 is a stepped hole, the first abutment pin 43 is vertically inserted at the end of the sliding portion 411 away from the closing portion 412, and the two ends of the closing elastic member 42 are respectively abutted against the inner wall of the air inlet hole 112 and the first abutment pin 43, so that the closing elastic member 42 is easy to disassemble and assemble.

[0082] In this embodiment, the piston assembly 50 includes a piston head 51 and a push rod 52. The piston head 51 is slidably disposed in the cylinder 11 and is located at one end of the cylinder 11 close to the second cover 13. The push rod 52 passes through the second cover 13 and is connected to the piston head 51. The end of the push rod 52 away from the piston head 51 abuts against the arc pressure rod 80. The push rod 52 is used to drive the piston head 51 to move toward the first cover 12 under the drive of the arc pressure rod 80. By arranging the push rod 52 to drive the piston head 51 to move toward the first cover 12 under the drive of the arc pressure rod 80, the air pressure in the rubber cylinder 10 can be increased and the bubbles in the glue can be quickly moved toward the needle 20, which is conducive to improving the efficiency of discharging bubbles from the glue.

[0083] In this embodiment, the glue dispenser 100 also includes a reset elastic member 60, which can be a spring. The reset elastic member 60 is sleeved on the push rod 52, and the two ends of the reset elastic member 60 are respectively connected to the second cover member 13 and the end of the push rod 52 away from the piston head 51. The reset elastic member 60 is used to drive the push rod 52 and the piston head 51 to reset when the arc pressure rod 80 is separated from the push rod 52. When the glue discharge operation is completed, the arc pressure rod 80 can be forced to drive the air valve assembly 40 to open the air inlet 112. At this time, the reset elastic member 60 drives the push rod 52 and the piston head 51 to reset, and the glue is output from the needle 20 under the action of its own gravity to perform the glue dispensing operation. In this way, by setting the reset elastic member 60, it is helpful to improve the convenience of resetting the push rod 52 and the piston head 51.

[0084] In this embodiment, the glue dispenser 100 also includes a second abutment pin 70, which is vertically inserted into the end of the push rod 52 away from the piston head 51. The two ends of the reset elastic member 60 are respectively abutted against the second cover member 13 and the second abutment pin 70, so that the reset elastic member 60 can be easily disassembled and assembled.

[0085] In this embodiment, one end of the arc-shaped pressure rod 80 away from the push rod 52 extends toward the first covering member 12, thereby increasing the length of the force arm of the arc-shaped pressure rod 80, thereby facilitating single-handed operation of the arc-shaped pressure rod 80 for glue dispensing.

[0086] In this embodiment, pressing protrusions 81 are protruding from opposite sides of one end of the arc-shaped pressure rod 80 close to the first cover member 12. The pressing protrusions 81 can increase the operating area of ​​the arc-shaped pressure rod 80 and have a certain anti-slip effect, thereby facilitating the operation of the arc-shaped pressure rod 80.

[0087] In summary, the glue dispenser 100 of the embodiment of the present application realizes the function of accurately controlling the flow rate of glue by providing the first flow limiting hole 311 and the second flow limiting hole 3211 for the glue to pass through on the first flow limiting member 31 and the second flow limiting member 32, and setting the second flow limiting member 32 to cooperate with the first flow limiting member 31 to adjust the flow rate of glue passing through the flow limiting component 30 when rotating, thereby effectively avoiding the accumulation of glue on the product due to uneven flow rate when the glue is output from the needle 20, which is beneficial to improve the quality of glue dispensing and reduce glue waste. In addition, by setting the filter 33, the uniformity of glue passing through the flow limiting component 30 can be further improved, and the filter 33 can also filter impurities in the glue, reducing the probability of needle 20 being blocked, which is further beneficial to improve the quality of glue dispensing.

[0088] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A glue dispenser, characterized in that: include: The glue cartridge comprises a cylinder body for storing glue; A needle, disposed at one end of the cylinder, for outputting the glue for dispensing; A flow limiting component is arranged in the cylinder and located at one end of the cylinder close to the needle. The flow limiting component includes a first flow limiting member, a second flow limiting member and a filter screen arranged along the axial direction of the cylinder. The first flow limiting member and the second flow limiting member are respectively provided with a first flow limiting hole and a second flow limiting hole. The second flow limiting member can rotate relative to the first flow limiting member. The second flow limiting member is used to cooperate with the first flow limiting member to adjust the flow rate of the glue through the flow limiting component.

2. The glue dispenser according to claim 1, characterized in that: A limiting hole extending along the circumference of the cylinder is formed on the side wall of one end of the cylinder near the needle head, the second flow limiting member includes a flow limiting plate and a driving protrusion protruding from the periphery of the flow limiting plate, the second flow limiting hole is formed in the flow limiting plate, the driving protrusion passes through the limiting hole and extends to the outside of the cylinder, and the driving protrusion is used to drive the flow limiting plate to rotate relative to the first flow limiting member under the action of external force.

3. The glue dispenser according to claim 2, characterized in that: The outer side wall of the cylinder is provided with a rotation scale, and the rotation scale is located at one side of the limiting hole and directly faces the dialing protrusion.

4. The glue dispenser according to claim 2, characterized in that: There are multiple first flow limiting holes and multiple second flow limiting holes, and the multiple first flow limiting holes and the second flow limiting holes are respectively arranged at circumferential intervals along the first flow limiting member and the flow limiting plate. The second flow limiting member cooperates with the first flow limiting member to adjust the flow rate of the glue passing through the flow limiting component to a minimum of zero.

5. The glue dispenser according to claim 2, characterized in that: The current limiting assembly also includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are spaced apart on the inner side of one end of the cylinder close to the needle, and the first sealing ring abuts against a side of the first current limiting member away from the current limiting plate, and the second sealing ring abuts against a side of the current limiting plate away from the first current limiting member.

6. The glue dispenser according to claim 1, characterized in that: The rubber cartridge also includes: A first covering member, which is covered on one end of the cylinder, and the needle is arranged on the first covering member; The second covering member is covered at the other end of the cylinder. The first covering member and the second covering member are used to close the two ends of the cylinder.

7. The glue dispenser according to claim 6, characterized in that: An air inlet hole is provided on a side wall of the cylinder body at one end close to the second cover member, and the glue dispenser further comprises: An air valve assembly, connected to the air inlet hole, and used to open or close the air inlet hole; A piston assembly is slidably disposed in the cylinder and extends out of the second cover member; An arc-shaped pressure rod is rotatably arranged at one end of the cylinder body close to the second covering member, and the arc-shaped pressure rod is respectively abutted against the air valve assembly and the piston assembly. The arc-shaped pressure rod is used to drive the air valve assembly to open the air inlet hole, and to drive the piston assembly to move toward the first covering member.

8. The glue dispenser according to claim 7, characterized in that: The gas valve assembly comprises: The closure member comprises a sliding portion and a closure portion, wherein the sliding portion slides through the air inlet and extends into the cylinder, the closure portion is arranged at one end of the sliding portion located in the cylinder, the closure portion and the sliding portion are coaxially arranged, and the size of the cross section of the closure portion is larger than the size of the cross section of the sliding portion, and the end of the sliding portion away from the closure portion abuts against the arc-shaped pressure rod; A closing elastic member is sleeved on the sliding portion, and two ends of the closing elastic member are respectively connected to the air inlet hole and one end of the sliding portion away from the closing portion, the closing elastic member is used to drive the closing portion to close the air inlet hole through the sliding portion, and the sliding portion is used to drive the closing portion to open the air inlet hole under the drive of the arc pressure rod.

9. The glue dispenser according to claim 7, characterized in that: The piston assembly comprises: A piston head is slidably disposed in the cylinder and is located at one end of the cylinder close to the second covering member; A push rod passes through the second covering member and is connected to the piston head. One end of the push rod away from the piston head abuts against the arc pressure rod. The push rod is used to drive the piston head to move toward the first covering member under the drive of the arc pressure rod.

10. The glue dispenser according to claim 9, characterized in that: The glue dispenser also includes a reset elastic member, which is sleeved on the push rod, and the two ends of the reset elastic member are respectively connected to the second covering member and an end of the push rod away from the piston head. The reset elastic member is used to drive the push rod and the piston head to reset when the arc pressure rod is disengaged from the push rod.

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