Glue dispensing equipment for electronic products

Abstract

The present invention discloses a glue dispensing processing device for electronic products, comprising a glue supply mechanism and a glue mixing valve, wherein the glue supply mechanism and the glue mixing valve are connected via a glue guide tube, a valve body is mounted on the glue guide tube, the valve body comprising a main body, a drive cavity located at both ends of the main body, and a glue supply cavity having a glue inlet channel, a glue outlet channel, and a glue discharge channel, the glue discharge channel of the valve body being connected to a waste liquid box via the glue discharge tube, an intermediate through hole being provided between the drive cavity and the glue supply cavity, and the left and right ends of a plunger rod located in the intermediate through hole being located in the drive cavity and the glue supply cavity, respectively. The glue dispensing processing device for electronic products of the present invention can automatically discharge waste glue containing bubbles in the glue guide tube in a timely manner, and continue dispensing glue immediately after the waste glue is completely discharged, thereby improving the efficiency of dispensing glue and the quality and efficiency of product processing while ensuring the quality of dispensing glue.

Description

Technical Field

[0001] The present invention relates to the technical field of glue dispensing, and in particular to a glue dispensing processing device for electronic products. Background Art

[0002] With the development of the economy, the continuous upgrading of products and the continuous expansion of application fields, the demand for injection and dispensing equipment has become more extensive and diversified. For example, the more stringent requirements of industries such as automotive electronics, new energy, motors, sensors, capacitors and ignition coils have prompted the continuous improvement of injection and dispensing equipment manufacturing technology and product quality, and at the same time, higher requirements have been put forward for injection and dispensing equipment.

[0003] During the operation of the dispensing equipment, once bubbles or impurities are found in the pipeline, the equipment needs to be paused and the operator needs to manually expel the bubbles or impurities before the equipment can be started again. This is not conducive to automated assembly line production and greatly reduces the efficiency of dispensing. Summary of the Invention

[0004] The purpose of the present invention is to provide a glue dispensing processing device for electronic products, which can automatically discharge waste glue with bubbles in the glue guide tube in time and continue to dispense glue as soon as the waste glue is completely discharged. While ensuring the quality of glue dispensing, it improves the glue dispensing efficiency and the quality and efficiency of product processing.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a glue dispensing processing device for electronic products, comprising a glue supply mechanism and a glue mixing valve, wherein the glue supply mechanism and the glue mixing valve are connected via a glue guide tube, and a valve body is mounted on the glue guide tube, wherein the valve body comprises a main body, a driving cavity located at both ends of the main body, and a glue supply cavity having a glue inlet channel, a glue outlet channel, and a glue discharge channel, wherein the glue inlet channel of the valve body is connected to the glue supply mechanism via the glue guide tube, the glue outlet channel of the valve body is connected to the glue mixing valve via the glue guide tube, and the glue discharge channel of the valve body is connected to a waste liquid box via the glue discharge tube;

[0006] An intermediate through hole is provided between the driving chamber and the glue supply chamber. The left and right ends of a plunger rod located in the intermediate through hole are respectively located in the driving chamber and the glue supply chamber. A first gasket is installed at one end of the glue discharge channel communicating with the glue supply chamber. The left end of the plunger rod has a plunger head that can be sealed with the first gasket. The plunger rod has a flange portion near the plunger head. A second gasket that can be sealed with the flange portion is installed at one end communicating with the intermediate through hole and the glue supply chamber. A gap channel is provided between the plunger rod and the body between the left end of the intermediate through hole and the glue discharge channel.

[0007] A piston disc is fixed to the right end of the plunger rod, which is sealed with the inner wall of the drive chamber. The piston disc is located between the left air inlet and the right air inlet. A guide sleeve for the plunger rod to be embedded is installed in the middle of the plunger rod. When the piston disc moves left and right in the drive chamber under the drive of the left air inlet or the right air inlet, the plunger head of the plunger rod moves left and right in the glue supply chamber accordingly, so that the plunger head of the plunger rod contacts the first gasket or the flange of the plunger rod contacts the second gasket.

[0008] A sealing ring is respectively provided between the guide sleeve and the glue outlet channel and the driving cavity, and the sealing ring is sealed and connected between the plunger rod and the body, and the sealing ring includes an annular base sleeved on the plunger rod, a first sealing lip sealingly matched with the plunger rod and a second sealing lip sealingly connected to the body, the first sealing lip and the second sealing lip are integrally formed on the same side of the annular base and surround a receiving groove with the annular base, a supporting frame is provided in the receiving groove, the first supporting wall of the supporting frame contacts the first sealing lip surface, and the second supporting wall of the supporting frame contacts the second sealing lip surface, an acute angle is formed between the inclined first supporting wall and the second supporting wall, the first supporting wall is provided with a plurality of inner notches extending to the second supporting wall, and the second supporting wall is provided with a plurality of outer notches extending to the first supporting wall, and the inner notches and the outer notches are staggered along the circumferential direction;

[0009] A bubble detection unit is installed on the rubber guide tube and between the valve body and the rubber supply mechanism. The bubble detection unit includes a base body. The base body is provided with a groove for the rubber tube to be embedded. An ultrasonic transmitter is provided on one side of the groove, and an ultrasonic receiver is provided on the other side. The bubble detection unit is installed on the rubber discharge tube and also includes a control module for generating a driving signal based on the information received from each bubble detection unit whether there are bubbles in the rubber tube, and injecting air into the driving cavity through the left air inlet or the right air inlet.

[0010] The further improved scheme in the above technical scheme is as follows:

[0011] 1. In the above solution, the guide sleeve includes a guide portion and a raised portion on the side surface of the left end of the guide portion. The raised portion of the guide sleeve is located in the limiting groove of the body. The plunger rod is embedded in the through hole of the guide portion. The inner wall of the through hole of the guide portion contacts the outer surface of the plunger rod. The inner wall surface of the through hole of the guide portion is provided with a plurality of small grooves along the axial direction. These small grooves are spaced apart along the circumferential direction.

[0012] 2. In the above solution, the thickness of the second support wall is greater than the thickness of the first support wall.

[0013] 3. In the above solution, the first supporting wall and the second supporting wall have a pair of flanges disposed opposite to each other on their opposing surfaces, and end surfaces of the flanges are in contact with end surfaces of the first supporting wall and the second supporting wall.

[0014] 4. In the above solution, the openings of the accommodating grooves on the two sealing rings face the glue outlet channel and the driving cavity respectively.

[0015] 5. In the above solution, a liquid level sensor is installed on the waste liquid box. When the liquid level sensor detects that the liquid level in the waste liquid box exceeds a set threshold, an alarm is issued.

[0016] 6. In the above solution, a one-way valve is installed on each of the glue guide tubes and located between the bubble detection unit and the glue supply mechanism.

[0017] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0018] 1. The glue dispensing processing device for electronic products of the present invention can not only monitor whether there are bubbles in the glue guide tube in real time during the glue dispensing process, but also automatically discharge the waste glue with bubbles in the glue guide tube in time, and continue to dispense glue as soon as the waste glue is completely discharged by monitoring the bubbles in the glue discharge tube, thereby improving the glue dispensing efficiency and the quality and efficiency of product processing while ensuring the quality of glue dispensing; further, a sealing ring is provided on each side of the guide sleeve 2, and a supporting frame is provided in the accommodating groove of the sealing ring, and the two supporting walls of the supporting frame are in contact with the sealing lip surface, and an acute angle is formed between the inclined first supporting wall and the second supporting wall, and the two supporting walls are staggered with notches, which can not only ensure the stable reciprocating motion of the plunger rod during long-term use, but also can adaptively adjust the acting force between the plunger rod and the body, and the greater the external force, the tighter the seal, thereby ensuring the safety and stability during long-term use, and ensuring the quality and accuracy of glue dispensing.

[0019] 2. The dispensing processing device for electronic products of the present invention comprises a guide sleeve for embedding a plunger rod, comprising a guide portion and a raised portion on the side surface of the left end of the guide portion, the raised portion of the guide sleeve being located in the limiting groove of the body, the plunger rod being embedded in the through hole of the guide portion, the inner wall of the through hole of the guide portion being in contact with the outer side surface of the plunger rod, a plurality of small grooves being axially opened on the inner wall surface of the through hole of the guide portion, the plurality of small grooves being circumferentially spaced apart, during the long-term repeated high-speed movement of the plunger rod, on the basis of preventing the plunger rod from shaking and causing accelerated wear of the plunger head, an air cushion can be formed to reduce the friction between the plunger rod and the guide sleeve, and the unilateral contact between the plunger rod and the guide sleeve to form a sealing surface and a unilateral pressure difference can be avoided to aggravate unilateral wear, and a channel can be provided for debris formed by wear to prevent the guide sleeve and the plunger rod from being worn and scratched by the debris, thereby ensuring the stability of glue discharge during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attachment Figure 1 This is a schematic structural diagram of a glue dispensing processing device for electronic products according to the present invention;

[0021] Attachment Figure 2 Schematic diagram of the structure of the bubble detection unit in the dispensing processing device of the present invention;

[0022] Attachment Figure 3 This is a cross-sectional view of the structure of the valve body in the dispensing processing device for electronic products of the present invention. Figure 1 ;

[0023] Attachment Figure 4 This is a cross-sectional view of the structure of the valve body in the dispensing processing device for electronic products of the present invention. Figure 2 ;

[0024] Attachment Figure 5 This is a schematic structural diagram of a sealing ring in a glue dispensing processing device for electronic products according to the present invention;

[0025] Attachment Figure 6 This is a structural cross-sectional view of a sealing ring in a glue dispensing processing device for electronic products according to the present invention;

[0026] Attachment Figure 7 This is a schematic structural diagram of the sealing ring support frame in the dispensing processing device of the present invention;

[0027] Attachment Figure 8 Schematic diagram of the partial structure of the valve body in the dispensing processing device for electronic products of the present invention Figure 1 ;

[0028] Attachment Figure 9 Schematic diagram of the partial structure of the valve body in the dispensing processing device for electronic products of the present invention Figure 2 ;

[0029] Attachment Figure 10 The electrical schematic diagram of the glue dispensing processing device for electronic products of the present invention.

[0030] In the above figures: 1. Glue supply mechanism; 2. Glue mixing valve; 3. Glue guide tube; 5. Bubble detection unit; 51. Base body; 52. Groove; 53. Ultrasonic transmitter; 54. Ultrasonic receiver; 6. Valve body; 7. Glue discharge tube; 8. Waste liquid box; 9. Sealing ring; 91. Annular base; 92. First sealing lip; 93. Second sealing lip; 94. Accommodating groove; 95. Support frame; 951. First support wall; 952. Second support wall; 953. Inner notch; 954. Outer groove 1. Glue outlet; 1. Glue inlet; 1. Glue outlet ... Guide ; 28. Raised portion; 29. ​​Limiting groove; 30. Through hole; 31. Small groove. DETAILED DESCRIPTION

[0031] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, for example, to mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this patent in specific circumstances.

[0032] Example 1: A glue dispensing device for electronic products, comprising a glue supply mechanism 1 and a glue mixing valve 2, wherein the glue supply mechanism 1 and the glue mixing valve 2 are connected via a glue guide tube 3, and a valve body 6 is mounted on the glue guide tube 3. The valve body 6 comprises a body 11, a drive cavity 12 located at both ends of the body 11, and a glue supply cavity 13 having a glue inlet channel 131, a glue outlet channel 132, and a glue discharge channel 133. The glue inlet channel 131 of the valve body 6 is connected to the glue supply mechanism 1 via the glue guide tube 3, the glue outlet channel 132 of the valve body 6 is connected to the glue mixing valve 2 via the glue guide tube 3, and the glue discharge channel 133 of the valve body 6 is connected to a waste liquid box 8 via a glue discharge tube 7.

[0033] An intermediate through hole 14 is provided between the drive chamber 12 and the glue supply chamber 13. A plunger rod 15 located in the intermediate through hole 14 has its left and right ends located in the drive chamber 12 and the glue supply chamber 13, respectively. A first gasket 16 is installed at one end of the glue discharge passage 133 communicating with the glue supply chamber 13. The left end of the plunger rod 15 has a plunger head 17 that can sealably cooperate with the first gasket 16. A flange portion 18 is provided on the plunger rod 15 near the plunger head 17. A second gasket 19 that can sealably contact the flange portion 18 is installed at one end of the intermediate through hole 14 communicating with the glue supply chamber 13. A gap channel 24 is defined between the plunger rod 15 and the body 11, between the left end of the intermediate through hole 14 and the glue discharge passage 132.

[0034] A piston disc 20 is fixed to the right end of the plunger rod 15, which is sealed with the inner wall of the drive chamber 12. The piston disc 20 is located between the left air inlet 21 and the right air inlet 22. A guide sleeve 23 for the plunger rod 15 to be embedded in is installed in the middle of the plunger rod 15. When the piston disc 20 moves left and right in the drive chamber 12 under the drive of the left air inlet 21 or the right air inlet 22, the plunger head 17 of the plunger rod 15 moves left and right in the glue supply chamber 13 accordingly, so that the plunger head 17 of the plunger rod 15 contacts the first gasket 16 or the flange portion 18 of the plunger rod 15 contacts the second gasket 19.

[0035] A sealing ring 9 is provided between the guide sleeve 23 and the glue outlet channel 132 and the drive chamber 12. The sealing ring 9 is sealed between the plunger rod 15 and the body 11. The sealing ring 9 includes an annular base 91 sleeved on the plunger rod 15, a first sealing lip 92 that seals with the plunger rod 15, and a second sealing lip 93 that is sealed with the body 11. The first sealing lip 92 and the second sealing lip 93 are integrally formed on the same side of the annular base 91 and enclose a receiving groove 94 with the annular base 91. A support frame 95 is provided in the receiving groove 94. The first support wall 951 of the support frame 95 is in surface contact with the first sealing lip 92, and the second support wall 952 of the support frame 95 is in surface contact with the second sealing lip 93. An acute angle is formed between the inclined first support wall 951 and the second support wall 952. The first support wall 951 is provided with a plurality of inner notches 953 extending to the second support wall 952, and the second support wall 952 is provided with a plurality of outer notches 954 extending to the first support wall 951. The inner notches 953 and the outer notches 954 are staggered along the circumferential direction.

[0036] A bubble detection unit 5 is installed on the rubber guide tube 3 and between the valve body 6 and the rubber supply mechanism 1. The bubble detection unit 5 includes a base body 51. The base body 51 is provided with a groove 52 for the rubber tube to be embedded. An ultrasonic transmitter 53 is provided on one side of the groove 52, and an ultrasonic receiver 54 is provided on the other side. The bubble detection unit 5 is installed on the rubber discharge tube 7 and also includes a control module 10 for generating a driving signal based on the information received from each bubble detection unit 5 whether there are bubbles in the rubber tube, and injecting air into the driving cavity 12 through the left air inlet 21 or the right air inlet 22.

[0037] The guide sleeve 23 includes a guide portion 27 and a raised portion 28 on the side surface of the left end of the guide portion 27. The raised portion 28 of the guide sleeve 23 is located in a limiting groove 29 of the body 11. The plunger rod 15 is inserted into a through hole 30 of the guide portion 27. The inner wall of the through hole 30 of the guide portion 27 contacts the outer surface of the plunger rod 15. The inner wall surface of the through hole 30 of the guide portion 27 is axially formed with a plurality of small grooves 31, which are spaced apart along the circumference.

[0038] The openings of the accommodating grooves 94 on the two sealing rings 9 face the glue outlet channel 132 and the driving chamber 12 respectively; a liquid level sensor is installed on the waste liquid box 8, and when the liquid level sensor detects that the liquid level in the waste liquid box 8 exceeds the set threshold, an alarm is issued.

[0039] Example 2: A glue dispensing device for electronic products, comprising a glue supply mechanism 1 and a glue mixing valve 2, wherein the glue supply mechanism 1 and the glue mixing valve 2 are connected via a glue guide tube 3, and a valve body 6 is mounted on the glue guide tube 3. The valve body 6 comprises a body 11, a drive cavity 12 located at both ends of the body 11, and a glue supply cavity 13 having a glue inlet channel 131, a glue outlet channel 132, and a glue discharge channel 133. The glue inlet channel 131 of the valve body 6 is connected to the glue supply mechanism 1 via the glue guide tube 3, the glue outlet channel 132 of the valve body 6 is connected to the glue mixing valve 2 via the glue guide tube 3, and the glue discharge channel 133 of the valve body 6 is connected to a waste liquid box 8 via a glue discharge tube 7.

[0040] An intermediate through hole 14 is provided between the drive chamber 12 and the glue supply chamber 13. A plunger rod 15 located in the intermediate through hole 14 has its left and right ends located in the drive chamber 12 and the glue supply chamber 13, respectively. A first gasket 16 is installed at one end of the glue discharge passage 133 communicating with the glue supply chamber 13. The left end of the plunger rod 15 has a plunger head 17 that can sealably cooperate with the first gasket 16. A flange portion 18 is provided on the plunger rod 15 near the plunger head 17. A second gasket 19 that can sealably contact the flange portion 18 is installed at one end of the intermediate through hole 14 communicating with the glue supply chamber 13. A gap channel 24 is defined between the plunger rod 15 and the body 11, between the left end of the intermediate through hole 14 and the glue discharge passage 132.

[0041] A piston disc 20 is fixed to the right end of the plunger rod 15, which is sealed with the inner wall of the drive chamber 12. The piston disc 20 is located between the left air inlet 21 and the right air inlet 22. A guide sleeve 23 for the plunger rod 15 to be embedded in is installed in the middle of the plunger rod 15. When the piston disc 20 moves left and right in the drive chamber 12 under the drive of the left air inlet 21 or the right air inlet 22, the plunger head 17 of the plunger rod 15 moves left and right in the glue supply chamber 13 accordingly, so that the plunger head 17 of the plunger rod 15 contacts the first gasket 16 or the flange portion 18 of the plunger rod 15 contacts the second gasket 19.

[0042] A sealing ring 9 is provided between the guide sleeve 23 and the glue outlet channel 132 and the drive chamber 12. The sealing ring 9 is sealed between the plunger rod 15 and the body 11. The sealing ring 9 includes an annular base 91 sleeved on the plunger rod 15, a first sealing lip 92 that seals with the plunger rod 15, and a second sealing lip 93 that is sealed with the body 11. The first sealing lip 92 and the second sealing lip 93 are integrally formed on the same side of the annular base 91 and enclose a receiving groove 94 with the annular base 91. A support frame 95 is provided in the receiving groove 94. The first support wall 951 of the support frame 95 is in surface contact with the first sealing lip 92, and the second support wall 952 of the support frame 95 is in surface contact with the second sealing lip 93. An acute angle is formed between the inclined first support wall 951 and the second support wall 952. The first support wall 951 is provided with a plurality of inner notches 953 extending to the second support wall 952, and the second support wall 952 is provided with a plurality of outer notches 954 extending to the first support wall 951. The inner notches 953 and the outer notches 954 are staggered along the circumferential direction.

[0043] A bubble detection unit 5 is installed on the rubber guide tube 3 and between the valve body 6 and the rubber supply mechanism 1. The bubble detection unit 5 includes a base body 51. The base body 51 is provided with a groove 52 for the rubber tube to be embedded. An ultrasonic transmitter 53 is provided on one side of the groove 52, and an ultrasonic receiver 54 is provided on the other side. The bubble detection unit 5 is installed on the rubber discharge tube 7 and also includes a control module 10 for generating a driving signal based on the information received from each bubble detection unit 5 whether there are bubbles in the rubber tube, and injecting air into the driving cavity 12 through the left air inlet 21 or the right air inlet 22.

[0044] The thickness of the second support wall 952 is greater than that of the first support wall 951. The first support wall 951 and the second support wall 952 have a pair of flanges 96 disposed opposite to each other on their opposing surfaces, and the end surfaces of the flanges 96 are in contact with the end surfaces of the first support wall 951 and the second support wall 952.

[0045] A one-way valve 26 is installed on the above-mentioned rubber guide tube 3 and between the bubble detection unit 5 and the glue supply mechanism 1 to prevent unmonitored bubbles from being generated in the rubber guide tube area near the glue mixing valve during the glue discharge process, thereby affecting the glue output quality.

[0046] When the above-mentioned glue dispensing processing device for electronic products is used, it can not only monitor the presence of bubbles in the glue guide tube in real time during the glue dispensing process, but also automatically discharge the waste glue with bubbles in the glue guide tube in a timely manner. By monitoring the bubbles in the glue discharge tube, glue dispensing can be resumed as soon as the waste glue is completely discharged. While ensuring the quality of glue dispensing, the glue dispensing efficiency and the quality and efficiency of product processing are improved.

[0047] Furthermore, a sealing ring is provided on each side of the guide sleeve 2, and a support frame is provided in the accommodating groove of the sealing ring. The two support walls of the support frame are in contact with the sealing lip surface, and an acute angle is formed between the first support wall and the second support wall which are arranged obliquely. Notches are staggered on the two support walls, which can ensure the stable reciprocating motion of the plunger rod during long-term use and can adaptively adjust the force between the plunger rod, the plunger rod and the body. The greater the external force, the tighter the seal, which ensures safety and stability during long-term use and ensures the quality and accuracy of dispensing.

[0048] Furthermore, the guide sleeve for the plunger rod to be embedded in includes a guide part and a protrusion on the side surface at the left end of the guide part, the protrusion of the guide sleeve is located in the limiting groove of the main body, and the plunger rod is embedded in the through hole of the guide part. The inner wall of the through hole of the guide part contacts the outer side surface of the plunger rod, and a plurality of small grooves are axially opened on the inner wall surface of the through hole of the guide part. These plurality of small grooves are distributed at intervals along the circumferential direction. During the long-term and repeated high-speed movement of the plunger rod, on the basis of preventing the plunger rod from shaking and causing accelerated wear of the plunger head, an air cushion can be formed to reduce the friction between the plunger rod and the guide sleeve, and the unilateral contact between the plunger rod and the guide sleeve to form a sealing surface and a unilateral pressure difference can be avoided to aggravate unilateral wear. A channel can also be provided for debris formed by wear to avoid wear and scratches on the guide sleeve and the plunger rod by the debris, thereby ensuring the stability of the glue discharge during long-term use.

[0049] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A glue dispensing device for electronic products, comprising a glue supply mechanism and a glue mixing valve, wherein the glue supply mechanism and the glue mixing valve are connected via a glue guide tube, and characterized in that: A valve body is installed on the rubber guide tube. The valve body includes a main body, a driving cavity located at both ends of the main body, and a rubber supply cavity having a rubber inlet channel, a rubber outlet channel, and a rubber discharge channel. The rubber inlet channel of the valve body is connected to the rubber supply mechanism through the rubber guide tube, the rubber outlet channel of the valve body is connected to the rubber mixing valve through the rubber guide tube, and the rubber discharge channel of the valve body is connected to a waste liquid box through the rubber discharge tube. A middle through hole is provided between the drive chamber and the glue supply chamber. The left and right ends of a plunger rod located in the middle through hole are respectively located in the drive chamber and the glue supply chamber. A first gasket is installed at one end of the glue discharge passage communicating with the glue supply chamber. The left end of the plunger rod has a plunger head that can be sealed with the first gasket. The plunger rod has a flange portion provided near the plunger head. A second gasket that can be sealed with the flange portion is installed at one end communicating with the glue supply chamber. A gap channel is provided between the plunger rod and the body between the left end of the middle through hole and the glue discharge passage. A piston disc is fixed to the right end of the plunger rod, which is sealed with the inner wall of the drive chamber. The piston disc is located between the left air inlet and the right air inlet. A guide sleeve for the plunger rod to be embedded in is installed in the middle of the plunger rod. When the piston disc moves left and right in the drive chamber under the drive of the left air inlet or the right air inlet, the plunger head of the plunger rod moves left and right in the glue supply chamber accordingly, so that the plunger head of the plunger rod contacts the first gasket or the flange of the plunger rod contacts the second gasket. A sealing ring is provided between the guide sleeve and the glue outlet channel and the driving cavity, and the sealing ring is sealed and connected between the plunger rod and the body. The sealing ring includes an annular base sleeved on the plunger rod, a first sealing lip sealingly matched with the plunger rod and a second sealing lip sealingly connected to the body. The first sealing lip and the second sealing lip are integrally formed on the same side of the annular base and surround an accommodating groove with the annular base. A supporting frame is provided in the accommodating groove. The first supporting wall of the supporting frame contacts the first sealing lip surface, and the second supporting wall of the supporting frame contacts the second sealing lip surface. An acute angle is formed between the inclined first supporting wall and the second supporting wall. The first supporting wall is provided with a plurality of inner notches extending to the second supporting wall, and the second supporting wall is provided with a plurality of outer notches extending to the first supporting wall. The inner notches and the outer notches are staggered along the circumferential direction. A bubble detection unit is installed on the rubber guide tube and between the valve body and the rubber supply mechanism. The bubble detection unit includes a base body. The base body is provided with a groove for the rubber tube to be embedded. An ultrasonic transmitter is provided on one side of the groove, and an ultrasonic receiver is provided on the other side. The bubble detection unit is installed on the rubber discharge tube and also includes a control module for generating a driving signal based on the information received from each bubble detection unit on whether there are bubbles in the rubber tube, and injecting air into the driving cavity through the left air inlet or the right air inlet.

2. The dispensing device for electronic products according to claim 1, characterized in that: The guide sleeve includes a guide portion and a raised portion on the side surface of the left end of the guide portion. The raised portion of the guide sleeve is located in the limiting groove of the body. The plunger rod is embedded in the through hole of the guide portion. The inner wall of the through hole of the guide portion contacts the outer side surface of the plunger rod. The inner wall surface of the through hole of the guide portion is provided with a plurality of small grooves along the axial direction. These plurality of small grooves are distributed at intervals along the circumferential direction.

3. The dispensing device for electronic products according to claim 1 or 2, characterized in that: The thickness of the second supporting wall is greater than the thickness of the first supporting wall.

4. The dispensing device for electronic products according to claim 1 or 2, characterized in that: A pair of flanges are provided on the opposing surfaces of the first supporting wall and the second supporting wall, and end surfaces of the flanges are in contact with end surfaces of the first supporting wall and the second supporting wall.

5. The dispensing device for electronic products according to claim 1 or 2, characterized in that: The openings of the accommodating grooves on the two sealing rings face the glue outlet channel and the driving cavity respectively.

6. The dispensing device for electronic products according to claim 1 or 2, characterized in that: A liquid level sensor is installed on the waste liquid box. When the liquid level sensor detects that the liquid level in the waste liquid box exceeds a set threshold, an alarm is issued.

7. The dispensing device for electronic products according to claim 1 or 2, characterized in that: A one-way valve is installed on the glue guide tube and located between the bubble detection unit and the glue supply mechanism.

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