An automatic dispensing device for liquid crystal display processing

Abstract

The application relates to the dispensing technical field, in particular to an automatic dispensing device for liquid crystal display screen processing, which comprises a workbench, symmetrically arranged slide rails are formed on the upper end face of the workbench, a U-shaped frame is slidably connected in the slide rail; at least two groups of limiting mechanisms are arranged on the upper end face of the workbench; two dispensing mechanisms are arranged on the horizontal section of the U-shaped frame; a cleaning mechanism is arranged on the front side of the horizontal section of the U-shaped frame; a leveling mechanism is arranged on the upper end face of the workbench and comprises two groups of leveling mechanisms which are arranged on the sides away from the limiting mechanisms. The limiting mechanism can adsorptively fix the back plate screen of the liquid crystal display screen, can increase the fixed stress area of the back plate screen of the liquid crystal display screen without affecting the dispensing area of the back plate screen of the liquid crystal display screen, can increase the firmness of the limiting mechanism and can complete the dispensing operation of the back plate screen of the liquid crystal display screen in one fixing.

Description

Technical Field

[0001] This invention relates to the field of dispensing technology, specifically to an automatic dispensing device for liquid crystal display screen processing. Background Technology

[0002] An LCD screen is a type of display that can be used for television and computer screens. Its advantages include low power consumption, small size, and low radiation.

[0003] In daily life, whether in the production process or in the later maintenance of LCD screens, it is necessary to apply adhesive to the back panel of the LCD screen to achieve functions such as adhesion, potting, insulation and fixation.

[0004] However, regarding the dispensing process for curved LCD screens, Chinese Utility Model Patent No. CN216419995U discloses a dispensing device for processing curved LCD screens. This device includes a platform, a dispensing component, a bending angle adjustment component, and a clamping and fixing component. The platform has a through groove, and the bottom of the through groove has a sliding groove. The clamping and fixing component is slidably connected inside the sliding groove. A support frame is fixed on the platform on one side of the through groove. The upper end of the support frame is slidably connected to the bending angle adjustment component, and one end of the bending angle adjustment component is connected to the dispensing component. The dispensing component is located above the through groove.

[0005] However, the aforementioned patent has the following problems in the adhesive application process for the back panel of curved LCD screens: First, for curved LCD screens, only one side is fixed. This fixing method is not secure for large curved LCD screens, and adhesive cannot be applied to the fixed side, making it impossible to apply adhesive completely in one go; Second, when applying adhesive to curved LCD screens, due to the fluidity of the adhesive, the adhesive applied to areas with greater curvature will be thinner than that applied to areas with gentler curvature, resulting in uneven adhesive thickness and affecting subsequent adhesive application and drying operations. Summary of the Invention

[0006] This invention provides an automatic dispensing device for liquid crystal display screen processing, which solves the problems existing in the prior art.

[0007] The present invention provides an automatic dispensing device for LCD screen processing, including a worktable, wherein slide rails are symmetrically provided on the left and right sides of the upper surface of the worktable, and a U-shaped frame is slidably connected in the slide rails.

[0008] The limiting mechanism shall be provided in at least two sets, which shall be symmetrically arranged on the upper surface of the worktable.

[0009] There are two dispensing mechanisms, which are slidably connected to the transverse section of the U-shaped frame.

[0010] The cleaning mechanism is located on the front side of the transverse section of the U-shaped frame.

[0011] The flushing mechanism is set on the upper surface of the worktable, and there are two sets of them, which are located on the side away from the limiting mechanism.

[0012] In one possible implementation, the limiting mechanism includes a support frame. The upper end of the worktable has front and rear receiving grooves. Support frames are fixedly connected to the upper end of the worktable and to the left and right sides of the receiving grooves. A rectangular frame is fixedly connected to both the left and right support frames. Multiple linearly distributed limiting rods are fixedly connected to the front and rear sides of the inner wall of the rectangular frame. The front and rear limiting rods are slidably connected to the sliding grooves on the front and rear sides of the rectangular moving rod, respectively. The upper end of the inner wall of each sliding groove is connected to the limiting rod via a first spring. A suction cup is fixedly connected to the top of the rectangular moving rod. Displacement grooves are opened on opposite sides of the left and right support frames, and a fixing component is commonly arranged in the two displacement grooves.

[0013] In one possible implementation, the fixing assembly includes symmetrically arranged movable rods, the two ends of which are slidably connected in displacement grooves. Tension springs are fixedly connected to the opposite sides of the two movable rods and located in the displacement grooves. A first set of electromagnets with opposite magnetic properties is fixedly connected to the opposite sides of the two movable rods and located near the displacement grooves. Multiple sets of limiting blocks are slidably connected to the left and right sides of the opposite sides of the two movable rods and located in the grooves on each rectangular movable rod. Each set of limiting blocks consists of two limiting blocks. A second set of electromagnets with the same magnetic properties is fixedly connected to the opposite sides of the two limiting blocks.

[0014] In one possible implementation, the dispensing mechanism includes a glue tank, the upper end of which is slidably connected to the transverse section of a U-shaped frame via a fixedly connected electric slider, a flow control component is provided on the glue tank, and a dispensing head is connected to the lower end of the glue tank.

[0015] In one possible implementation, the flow control assembly includes a flow limiting rod. A connecting plate is fixedly connected to the lower end of the electric slider. The flow limiting rod is slidably connected to the connecting plate and is slidably connected to the connection between the glue tank and the dispensing head. A second spring is sleeved on the flow limiting rod and is fixedly connected to the connecting rod and the outer wall of the glue tank. A cam abuts against the rear side of the flow limiting rod. One end of the connecting shaft on the cam is rotatably connected to an auxiliary plate. The auxiliary plate is fixedly connected to the lower end of the electric slider. The other end of the connecting shaft on the cam is rotatably connected to the output end of a motor via a belt. The motor is fixedly connected to the auxiliary plate and located directly above the cam.

[0016] In one possible implementation, the cleaning mechanism includes a connecting frame fixedly connected to the front side of the transverse section of the U-shaped frame. Spring telescopic rods are fixedly connected to the left and right sides of the lower end of the connecting frame. A rotating shaft is rotatably connected to the outer wall of the spring telescopic rod. A wiping sponge roller is fixedly sleeved on the rotating shaft. An arc-shaped cover is rotatably connected to the rotating shaft. The arc-shaped cover has a fixing hole. A limit post is slidably connected to the connecting frame at the position corresponding to the fixing hole. A third spring is fixedly connected to the limit post, and the other end of the third spring is fixedly connected to the arc-shaped cover.

[0017] In one possible implementation, the flushing mechanism includes two fixed frames symmetrically connected to the upper surface of the worktable. A limit frame is elastically slidably connected to the fixed frame. A flushing plate is fixedly connected to both the left and right limit frames. Limit holes are provided on both the fixed frame and the limit frame, and a pin is inserted into the limit hole.

[0018] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0019] 1. An automatic dispensing device for liquid crystal display processing provided by an embodiment of the present invention, through a set limiting mechanism, can adsorb and fix the back panel of the liquid crystal display, increasing the fixing force area of ​​the back panel of the liquid crystal display without affecting the dispensing area of ​​the back panel of the liquid crystal display, increasing the firmness of the limiting and enabling the dispensing operation of the back panel of the liquid crystal display to be completed in one fixation.

[0020] 2. An automatic dispensing device for LCD screen processing provided by an embodiment of the present invention, through a set flow control component, allows the amount of glue flowing from the glue tank into the dispensing head to be different within a certain period of time. Under the action of the cam-controlled flow limiting rod, the amount of glue dispensed in the middle area of ​​the back panel of the LCD screen is less than the amount of glue dispensed on both sides. This controls the glue thickness of the back panel of the LCD screen to remain approximately consistent when it is bonded to the LCD screen, ensuring the subsequent drying operation of the LCD screen.

[0021] 3. An automatic dispensing device for liquid crystal display processing provided in the embodiment of the present invention, through the setting of a flushing mechanism, keeps the back panel of the liquid crystal display in a symmetrical position within the limiting mechanism, so as to ensure that the amount of water poured on both sides of the subsequent dispensing is consistent. Attached Figure Description

[0022] Figure 1 This is a first-view perspective three-dimensional structural diagram (viewed from front to back) of an automatic dispensing device for liquid crystal display processing provided in an embodiment of the present invention.

[0023] Figure 2This is a second-view perspective three-dimensional structural diagram (viewed from back to front) of an automatic dispensing device for liquid crystal display processing provided in an embodiment of the present invention.

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 This is a three-dimensional structural diagram of the limiting mechanism of an automatic dispensing device for LCD screen processing provided in an embodiment of the present invention (excluding the receiving groove structure).

[0026] Figure 5 This is provided by the embodiments of the present invention. Figure 4 Enlarged view of point B in the middle.

[0027] Figure 6 This is a schematic diagram of the cleaning mechanism of an automatic dispensing device for LCD screen processing provided in an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the adhesive dispensing route for the back panel of a liquid crystal display screen provided in an embodiment of the present invention.

[0029] In the diagram: 1. Workbench; 11. Slide rail; 2. U-shaped frame; 3. Limiting mechanism; 30. Receiving groove; 31. Support frame; 32. Rectangular frame; 33. Limiting rod; 34. Rectangular moving rod; 35. Slide groove; 36. First spring; 37. Suction cup; 38. Fixing assembly; 381. Moving rod; 382. First electromagnet assembly; 383. Limiting block; 384. Second electromagnet assembly; 4. Dispensing mechanism; 41. Glue tank; 42. Flow control assembly; 43. Dispensing head; 421. Flow limiting rod; 422. Cam; 5. Cleaning mechanism; 51. Connecting frame; 52. Spring telescopic rod; 53. Rotating shaft; 54. Wiping sponge roller; 55. Limiting post; 56. Arc-shaped cover; 6. Flush mechanism; 61. Fixing frame; 62. Limiting frame; 63. Flush plate. Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Please see Figure 1 and Figure 2An automatic dispensing device for LCD screen processing includes a worktable 1, with slide rails 11 symmetrically arranged on the left and right sides of the upper surface of the worktable 1, and a U-shaped frame 2 slidably connected within the slide rails 11; a limiting mechanism 3, at least two sets of which are symmetrically arranged on the upper surface of the worktable 1; a dispensing mechanism 4, two of which are slidably connected to the transverse section of the U-shaped frame 2; a cleaning mechanism 5, located on the front side of the transverse section of the U-shaped frame 2; and a leveling mechanism 6, two sets of which are located on the upper surface of the worktable 1, on the side away from the limiting mechanism 3.

[0032] In specific operations, when applying adhesive to the back panel of the LCD screen, first place both ends of the back panel of the LCD screen on the upper end of the adjusting and leveling mechanism 6, and continue to press down on the LCD screen until the bottom of the LCD screen contacts the limiting mechanism 3. The limiting mechanism 3 limits and fixes the LCD screen. Then, the cleaning mechanism 5 cleans the LCD screen. Finally, the adhesive is applied to the cleaned LCD screen through the dispensing mechanism 4.

[0033] See Figure 2 The flushing mechanism 6 includes a fixed frame 61 that is symmetrically fixed to the upper surface of the workbench 1. A limit frame 62 is elastically slidably connected to the fixed frame 61. A flushing plate 63 is fixedly connected to both the left and right limit frames 62. Limiting holes are provided on both the fixed frame 61 and the limit frame 62, and a pin is inserted into the limiting hole.

[0034] In practice, firstly, pull out the pin in the limiting hole, place the two sides of the LCD screen symmetrically on the limiting frame 62, press the LCD screen down, and slide the limiting frame 62 down on the fixing frame 61 until it is pressed and attached to the limiting mechanism 3. At this time, insert the pin into the limiting hole in the fixing frame 61 and the limiting frame 62. Since the two sides of the back panel of the LCD screen are respectively on the flushing mechanism 6, it can be ensured that the back panel of the LCD screen is symmetrically set on the front and rear limiting mechanisms 3, further ensuring the uniformity of the subsequent glue dispensing on both sides.

[0035] See Figure 2 , Figure 4 and Figure 5The limiting mechanism 3 includes a support frame 31. The upper end of the worktable 1 has a receiving groove 30 at the front and back. The upper end of the worktable 1 and the left and right sides of the receiving groove 30 are fixedly connected to the support frame 31. The left and right support frames 31 are fixedly connected to a rectangular frame 32. The inner walls of the rectangular frame 32 are fixedly connected to multiple linearly distributed limiting rods 33 on both the front and back sides. The front and back limiting rods 33 are slidably connected in the sliding grooves 35 on the front and back sides of the rectangular moving rod 34. The upper end of the inner wall of each sliding groove 35 is connected to the limiting rod 33 by a first spring 36. The top of the rectangular moving rod 34 is fixedly connected to a suction cup 37. The opposite sides of the left and right support frames 31 are provided with displacement grooves. The two displacement grooves are jointly provided with a fixing component 38.

[0036] In actual operation, the back panel of the LCD screen is placed on the suction cups 37 on the two sets of limiting mechanisms 3. Under the gravity of the LCD screen, the rectangular moving rods 34 will descend vertically to different heights according to the curvature of the LCD screen under the action of the limiting rods 33 on the rectangular frame 32. The first spring 36 will be compressed during the downward movement of the rectangular moving rods 34. During the downward movement of the LCD screen, the suction cups 37 will completely adhere to the LCD screen. At this time, the fixing component 38 is activated to fix the position of the multiple limiting rods 33.

[0037] See Figure 5 The fixing component 38 includes symmetrically arranged front and rear moving rods 381. The two ends of the moving rods 381 are slidably connected in the displacement groove. Tension springs are fixedly connected to the opposite sides of the two moving rods 381 and located in the displacement groove. A first electromagnet group 382 with opposite magnetic properties is fixedly connected to the opposite sides of the two moving rods 381 and located near the displacement groove. Multiple sets of limiting blocks 383 are slidably connected to the left and right sides of the opposite sides of the two moving rods 381 and located at the position of the sliding groove 35 on each rectangular moving rod 34. Each set of limiting blocks 383 consists of two limiting blocks 383. A second electromagnet group 384 with the same magnetic properties is fixedly connected to the opposite sides of the two limiting blocks 383.

[0038] In actual operation, after multiple rectangular moving rods 34 descend, the fixing assembly 38 is activated. First, the external power supply connected to the first electromagnet group 382 is turned on. Since the magnetic properties of the moving rods 381 on both sides of the first electromagnet group 382 are opposite, they will attract each other. The two moving rods 381 located in front of and behind the rectangular moving rod 34 move closer to each other, compressing and stretching the spring. The multiple sets of limiting blocks 383 on the corresponding moving rods 381 move into the sliding grooves 35 on the rectangular moving rod 34. Then, the second electromagnet group 384 is activated. Since the magnetic properties of the two limiting blocks 383 are the same, they will move away from each other in the left and right directions. The two limiting blocks 383 will abut in the sliding grooves 35, further determining the position of the rectangular moving rod 34.

[0039] See Figure 1 and Figure 6 The cleaning mechanism 5 includes a connecting frame 51, which is fixedly connected to the front side of the transverse section of the U-shaped frame 2. Spring telescopic rods 52 are fixedly connected to the lower left and right sides of the connecting frame 51. A rotating shaft 53 is rotatably connected to the outer wall of the spring telescopic rod 52. A wiping sponge roller 54 is fixedly sleeved on the rotating shaft 53. An arc-shaped cover 56 is rotatably connected to the rotating shaft 53. A fixing hole is opened on the arc-shaped cover 56. A limit post 55 is slidably connected to the connecting frame 51 at the position corresponding to the fixing hole. A third spring is fixedly connected to the limit post 55, and the other end of the third spring is fixedly connected to the arc-shaped cover 56.

[0040] In actual operation, with the back panel of the LCD screen fixed on the limiting mechanism 3, the moving U-shaped frame 2 is moved forward. At this time, under the force of the third spring of the limiting post 55, the arc-shaped cover 56 will be fixed above the wiping sponge roller 54. During the forward movement of the moving U-shaped frame 2, the wiping sponge roller 54 performs a preliminary wipe on the back panel of the LCD screen. The wiping sponge roller 54 can absorb water or alcohol to perform a preliminary cleaning of the back panel of the LCD screen. When it moves from the rear end to the front end of the back panel of the LCD screen, the limiting post 55 is pulled out from the fixing hole. At this time, the arc-shaped cover 56 will rotate to the bottom of the wiping sponge roller 54 under its own gravity. The outside of the arc-shaped cover 56 is attached with cotton cloth, which wipes the back panel of the LCD screen dry again.

[0041] See Figure 2 and Figure 3 The dispensing mechanism 4 includes a glue tank 41. The upper end of the glue tank 41 is slidably connected to the transverse section of the U-shaped frame 2 via a fixedly connected electric slider. A flow control component 42 is provided on the glue tank 41, and the lower end of the glue tank 41 is connected to a dispensing head 43.

[0042] In actual operation, the fixed LCD screen is glued using the dispensing mechanism 4. The dispensing mechanism 4 moves back and forth on the worktable 1 along with the U-shaped frame 2. First, the two dispensing mechanisms 4 approach the vertical section of the U-shaped frame 2 respectively. The U-shaped frame 2 moves from back to front until it reaches the front side of the LCD screen. The two dispensing mechanisms 4 move closer to each other. Then, the U-shaped frame 2 moves from front to back. To reiterate, the dispensing head 43 is an existing interval dispensing head. It can be controlled by a sensor to dispense glue. At certain intervals, the dispensing head automatically opens to dispense glue onto the back panel of the LCD screen.

[0043] The flow control assembly 42 includes a flow limiting rod 421. A connecting plate is fixedly connected to the lower end of the electric slider. The flow limiting rod 421 is slidably connected to the connecting plate, and the flow limiting rod 421 is slidably connected to the connection between the glue tank 41 and the dispensing head 43. A second spring is sleeved on the flow limiting rod 421, and the second spring is fixedly connected to the connecting rod and the outer wall of the glue tank 41. A cam 422 is located at the rear side of the flow limiting rod 421 and abuts against it. One end of the connecting shaft on the cam 422 is rotatably connected to an auxiliary plate. The auxiliary plate is fixedly connected to the lower end of the electric slider. The other end of the connecting shaft on the cam 422 is rotatably connected to the output end of the motor via a belt. The motor is fixedly connected to the auxiliary plate and located directly above the cam 422.

[0044] In actual operation, during the movement of the dispensing mechanism 4, the motor power is turned on, and the motor synchronously drives the cam 422 to rotate via a belt. The cam 422 will drive the flow-limiting rod 421 to move back and forth on the connecting plate. A rubber ring to prevent glue leakage is provided at the connection between the glue tank 41 and the flow-limiting rod 421. The glue in the glue tank 41 flows into the dispensing head 43. Since the curved screen of the LCD display is bent to both sides, during the movement of the flow-limiting rod 421 driven by the cam 422, the glue tank will leak for a certain period of time. The amount of glue flowing into the inner cavity of the dispensing head 43 is different, and the amount of water dripped from the dispensing head 43 onto the back panel of the LCD screen is different in the same amount of time. Due to the large curvature on both sides, in order to reduce glue loss caused by glue flow, that is, the amount of glue on both sides of the back panel of the LCD screen is more than the amount of water poured in the middle. When the dispensing mechanism 4 moves to the center position of the back panel of the LCD screen, the protrusion of the cam 422 abuts against one end of the flow limiting rod 421. At this time, the amount of glue is the least, so as to ensure that the glue thickness at the dispensing point is the same.

[0045] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic dispensing device for liquid crystal display screen processing, comprising a worktable, characterized in that: The upper surface of the workbench is symmetrically provided with slide rails on the left and right sides, and a U-shaped frame is slidably connected inside the slide rails; The limit mechanism is provided in at least two sets, and the two sets of limit mechanisms are symmetrically arranged on the upper surface of the worktable. There are two dispensing mechanisms, which are slidably connected to the transverse section of the U-shaped frame; The cleaning mechanism is located on the front side of the transverse section of the U-shaped frame; The flushing mechanism is set on the upper surface of the worktable, and there are two sets of them, which are located on the side away from the limiting mechanism. The flushing mechanism includes two fixed frames that are symmetrically connected to the upper surface of the workbench. A limit frame is elastically slidably connected to the fixed frame. A flushing plate is fixedly connected to both the left and right limit frames. Limit holes are provided on both the fixed frame and the limit frame, and a pin is inserted into the limit hole. The limiting mechanism includes a support frame. The upper end of the worktable has a receiving groove at the front and back. The upper end of the worktable and the left and right sides of the receiving groove are fixedly connected to the support frame. The left and right support frames are fixedly connected to a rectangular frame. The inner walls of the rectangular frame are fixedly connected to multiple linearly distributed limiting rods on both the front and back sides. The front and back limiting rods are slidably connected in the sliding grooves on the front and back sides of the rectangular moving rod. The upper end of the inner wall of each sliding groove is connected to the limiting rod by a first spring. The top of the rectangular moving rod is fixedly connected to a suction cup. The opposite sides of the left and right support frames are provided with displacement grooves. The two displacement grooves are provided with a fixing component. The fixing component includes symmetrically arranged moving rods at the front and rear, with both ends of the moving rods slidably connected in the displacement groove. Tension springs are fixedly connected to the opposite sides of the two moving rods and located in the displacement groove. A first set of electromagnets with opposite magnetic properties is fixedly connected to the opposite sides of the two moving rods and located near the displacement groove. Multiple sets of limiting blocks are slidably connected to the left and right sides of the opposite sides of the two moving rods and located in the sliding groove of each rectangular moving rod. Each set of limiting blocks consists of two limiting blocks. A second set of electromagnets with the same magnetic properties is fixedly connected to the opposite sides of the two limiting blocks. The cleaning mechanism includes a connecting frame, which is fixedly connected to the front side of the transverse section of the U-shaped frame. Spring telescopic rods are fixedly connected to the lower left and right sides of the connecting frame. A rotating shaft is rotatably connected to the outer wall of the spring telescopic rod. A wiping sponge roller is fixedly sleeved on the rotating shaft. An arc-shaped cover is rotatably connected to the rotating shaft. A fixing hole is opened on the arc-shaped cover. A limit post is slidably connected to the connecting frame at the position corresponding to the fixing hole. A third spring is fixedly connected to the limit post, and the other end of the third spring is fixedly connected to the arc-shaped cover. Cotton cloth is pasted on the outside of the arc-shaped cover.

2. The automatic dispensing device for liquid crystal display screen processing according to claim 1, characterized in that: The dispensing mechanism includes a glue tank, the upper end of which is slidably connected to the transverse section of the U-shaped frame via a fixed electric slider. The glue tank is equipped with a flow control component, and the lower end of the glue tank is connected to a dispensing head.

3. An automatic dispensing device for liquid crystal display screen processing according to claim 2, characterized in that: The flow control assembly includes a flow limiting rod. A connecting plate is fixedly connected to the lower end of the electric slider. The flow limiting rod is slidably connected to the connecting plate and is slidably connected to the connection between the glue tank and the dispensing head. A second spring is sleeved on the flow limiting rod and is fixedly connected to the connecting rod and the outer wall of the glue tank. A cam is located at the rear side of the flow limiting rod and abuts against it. One end of the connecting shaft on the cam is rotatably connected to an auxiliary plate. The auxiliary plate is fixedly connected to the lower end of the electric slider. The other end of the connecting shaft on the cam is rotatably connected to the output end of the motor via a belt. The motor is fixedly connected to the auxiliary plate and located directly above the cam.

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