Plug-in heating element integrated module

Abstract

The utility model relates to the technical field of heater structure, and specifically discloses a plug-in heating element integrated module, which includes an upper shell, a middle shell, a lower shell and pins. The pins are fixed to the upper shell by injection molding of insert plastic sealing, and both ends of the pins are exposed from the upper shell; the upper shell and the lower shell are fixedly connected, one end of the middle shell is clamped and fixed between the upper shell and the lower shell, and the other end of the middle shell is used to carry a ceramic heat sink and an aluminum tube; there are three pins, including: a first pin, a second pin and a third pin; one end of the second pin and the third pin are connected to a small load by crimping to achieve circuit connection; the pin power ends of the first pin and the third pin are connected to the power cord by plugging in a card slot. The structure of the utility model enables it to be connected to a small load or a circuit board circuit without the aid of any consumables, and can be plugged and crimped manually, which reduces production costs, eliminates energy consumption pollution, and improves production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heater structures, in particular to a heating element of a heater structure. Background Art

[0002] The heater structure generally includes a heating element, which adopts a small load (thermistor) and is connected to a power source to receive current.

[0003] The traditional way of connecting small loads to power sources is through high-temperature soldering, which has the disadvantages of high pollution, high energy consumption, high cost and low production capacity.

[0004] The traditional connection between the positive and negative power lines and the circuit board is also through high-temperature soldering, which also has the defects of high pollution, high energy consumption, high cost and low production capacity. Utility Model Content

[0005] The technical problem to be solved by the utility model is: to improve the circuit connection method between the heating element and the positive and negative power supplies, to perform circuit connection by setting pins, the pins are fixed to the upper shell body by injection molding of insert plastic sealing, wherein one end of two pins is in contact with the power supply contact surface on the surface of the small load by crimping to realize circuit connection, and two pin power supply ends are connected to the power cord by plugging in the wire slot, thus reducing costs, eliminating energy consumption pollution and improving production efficiency.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: a plug-in heating element integrated module, which includes an upper shell, a middle shell, a lower shell and pins, the pins are fixed to the upper shell by injection molding of insert plastic sealing, and the two ends of the pins are exposed to the upper shell;

[0007] The upper shell and the lower shell are fixedly connected, one end of the middle shell is clamped and fixed between the upper shell and the lower shell, and the other end of the middle shell is used to carry the ceramic heat sink and the aluminum tube;

[0008] There are three pins, including: a first pin, a second pin and a third pin;

[0009] The first pin includes: a power supply end clamping groove and a circuit board end elastic contact pin, the power supply end clamping groove and the circuit board end elastic contact pin of the first pin are respectively arranged at two ends of the first pin, the power supply end clamping groove of the first pin is used to realize circuit connection with the power line by plugging, and the circuit board end elastic contact pin of the first pin is bent and elastic, so that the circuit board end elastic contact pin of the first pin can be crimped and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0010] The second pin includes: a small load end elastic contact pin and a circuit board end elastic contact pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are respectively arranged at two ends of the second pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are both bent and elastic, so that the small load end elastic contact pin of the second pin can be pressed and contacted with the small load power supply contact surface to realize circuit connection, and the circuit board end elastic contact pin of the second pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0011] The third pin comprises: an elastic contact pin at a small load end, an elastic contact pin at a circuit board end, and a wire clamping groove at a power supply end. The elastic contact pin at the small load end and the wire clamping groove at the power supply end of the third pin are respectively arranged at two sides of one end of the third pin, and the elastic contact pin at the circuit board end of the third pin is arranged at the other end of the third pin; the elastic contact pin at the small load end of the third pin is bent and elastic, so that the elastic contact pin at the small load end of the third pin can be pressed and contacted with the contact surface of the small load power supply to realize circuit connection; the wire clamping groove at the power supply end of the third pin is used to realize circuit connection with the power line by plugging; the elastic contact pin at the circuit board end of the third pin is bent and elastic, so that the elastic contact pin at the circuit board end of the third pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0012] The upper shell is provided with two power line card slot holes, and the lower shell is provided with two power line card slot auxiliary positions. The power line card slot auxiliary position is a hollow slot, and two protruding ribs are provided on both sides of the slot to be able to extend into the power line card slot holes. The power line card slot holes and the power line card slot auxiliary positions are provided correspondingly. The power end card slot of the first pin is provided in a pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs. The power end card slot of the third pin is provided in another pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs.

[0013] The upper shell is provided with a small load through hole and a pin crimping auxiliary rib, the middle shell is provided with a small load through groove, and the lower shell is provided with a small load through groove; the small load through hole of the upper shell, the small load through groove of the middle shell, and the small load through groove of the lower shell are correspondingly arranged for the small load to pass through; the pin crimping auxiliary rib is arranged on both sides of the small load through hole, for supporting the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, so as to provide auxiliary force for the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin.

[0014] As a preferred technical solution, the lower shell is provided with three pin auxiliary ribs for supporting the elastic contact pins of the circuit board end of the three pins to provide auxiliary force for the elastic contact pins of the circuit board end.

[0015] As a preferred technical solution, the plug-in heating element integrated module comprises: a ceramic heat sink, a small load and an aluminum tube, the ceramic heat sink comprises: a ceramic heat dissipation hole and a thermistor accommodating groove, and the middle shell is provided with an aluminum tube passing hole;

[0016] The aluminum tube through hole and the ceramic heat dissipation hole are arranged correspondingly; the aluminum tube passes through the aluminum tube through hole and the ceramic heat dissipation hole in sequence, and is used to fix the ceramic heat sink to the middle shell; the thermistor accommodating groove is sleeved on the outside of the pin crimping auxiliary rib of the upper shell, and the small load is sandwiched between the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, and the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin are kept in contact with the small load power supply contact surfaces set on two surfaces of the small load respectively.

[0017] As a preferred technical solution, the plug-in heating element integrated module includes a circuit board;

[0018] The upper shell is provided with a circuit board slot, and the lower shell is provided with a circuit board slot, and the circuit board slot of the upper shell and the circuit board slot of the lower shell are arranged correspondingly;

[0019] The circuit board is inserted into the circuit board insertion slot of the upper shell and the circuit board insertion slot of the lower shell, and the circuit contact surface of the circuit board contacts the elastic contact pins of the circuit board end of the three pins to realize circuit connection.

[0020] As a preferred technical solution, the upper shell is provided with an upper shell fixing rivet column, the middle shell is provided with a limited fixing hole, and the lower shell is provided with a lower shell fixing rivet hole. The upper shell fixing rivet column passes through the limited fixing hole and is inserted into the lower shell fixing rivet hole to rivet and fix the upper shell, the middle shell and the lower shell together.

[0021] As a preferred technical solution, the middle shell is provided with a structural hole for fixing the plug-in heating element integrated module including the upper shell, the middle shell and the lower shell on the plastic shell.

[0022] In order to solve the above technical problems, another technical solution adopted by the utility model is:

[0023] A plug-in heating element integrated module, comprising an upper shell, a middle shell, a lower shell and pins, wherein the pins are fixed to the upper shell by injection molding of insert plastic sealing, and both ends of the pins are exposed to the upper shell;

[0024] The upper shell and the lower shell are fixedly connected, one end of the middle shell is clamped and fixed between the upper shell and the lower shell, and the other end of the middle shell is used to carry the ceramic heat sink and the aluminum tube;

[0025] There are four pins, including: a first pin, a second pin, a third pin and a fourth pin;

[0026] The first pin includes: a power supply end clamping groove and a circuit board end elastic contact pin, the power supply end clamping groove and the circuit board end elastic contact pin of the first pin are respectively arranged at two ends of the first pin, the power supply end clamping groove of the first pin is used to realize circuit connection with the power line by plugging, and the circuit board end elastic contact pin of the first pin is bent and elastic, so that the circuit board end elastic contact pin of the first pin can be crimped and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0027] The second pin includes: a small load end elastic contact pin and a circuit board end elastic contact pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are respectively arranged at two ends of the second pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are both bent and elastic, so that the small load end elastic contact pin of the second pin can be pressed and contacted with the small load power supply contact surface to realize circuit connection, and the circuit board end elastic contact pin of the second pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0028] The third pin includes: a small load end elastic contact pin and a circuit board end elastic contact pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the third pin are respectively arranged at two ends of the third pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the third pin are both bent and elastic, so that the small load end elastic contact pin of the third pin can be pressed and contacted with the small load power supply contact surface to realize circuit connection, and the circuit board end elastic contact pin of the third pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0029] The fourth pin includes: a power supply end card slot and a circuit board end elastic contact pin, the power supply end card slot and the circuit board end elastic contact pin of the fourth pin are respectively arranged at two ends of the fourth pin, the power supply end card slot of the fourth pin is used to realize circuit connection with the power line by plugging, and the circuit board end elastic contact pin of the fourth pin is bent and elastic, so that the circuit board end elastic contact pin of the fourth pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection;

[0030] The upper shell is provided with two power line card slot holes, and the lower shell is provided with two power line card slot auxiliary positions. The power line card slot auxiliary position is a hollow slot, and two protruding ribs are provided on both sides of the slot to be able to extend into the power line card slot holes. The power line card slot holes and the power line card slot auxiliary positions are provided correspondingly. The power end card slot of the first pin is provided in a pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs. The power end card slot of the fourth pin is provided in another pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs.

[0031] The upper shell is provided with a small load through hole and a pin crimping auxiliary rib, the middle shell is provided with a small load through groove, and the lower shell is provided with a small load through groove; the small load through hole of the upper shell, the small load through groove of the middle shell, and the small load through groove of the lower shell are correspondingly arranged for the small load to pass through; the pin crimping auxiliary rib is arranged on both sides of the small load through hole, for supporting the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, so as to provide auxiliary force for the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin.

[0032] As a preferred technical solution, the lower shell is provided with four pin auxiliary ribs for supporting the four pins' circuit board end elastic contact pins to provide auxiliary force for the circuit board end elastic contact pins.

[0033] As a preferred technical solution, the plug-in heating element integrated module further includes: a ceramic heat sink, a small load and an aluminum tube, the ceramic heat sink includes: a ceramic heat dissipation hole and a thermistor accommodating groove, and the middle shell is provided with an aluminum tube passing hole;

[0034] The aluminum tube through hole and the ceramic heat dissipation hole are arranged correspondingly; the aluminum tube passes through the aluminum tube through hole and the ceramic heat dissipation hole in sequence, and is used to fix the ceramic heat sink to the middle shell; the thermistor accommodating groove is sleeved on the outside of the pin crimping auxiliary rib of the upper shell, and the small load is sandwiched between the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, and the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin are kept in contact with the small load power supply contact surfaces set on two surfaces of the small load respectively.

[0035] As a preferred technical solution, the plug-in heating element integrated module includes a circuit board;

[0036] The upper shell is provided with a circuit board slot, and the lower shell is provided with a circuit board slot, and the circuit board slot of the upper shell and the circuit board slot of the lower shell are arranged correspondingly;

[0037] The circuit board is inserted into the circuit board insertion slot of the upper shell and the circuit board insertion slot of the lower shell, and the circuit contact surface of the circuit board contacts the elastic contact pins of the circuit board ends of the four pins to realize circuit connection.

[0038] The utility model connects the circuit by setting pins, and the pins are fixed to the upper shell by injection molding of insert plastic sealing, and only the two ends that need to be connected with the power line, the circuit board, and the small load circuit are exposed. The pins can be completely fixed to the upper shell without other fixing methods; one end of the two pins is in contact with the power contact surface of the small load surface by crimping to realize circuit connection; the power end of the two pins is connected to the power line by plugging in the card slot, and the plugging can be completed manually without any consumables; therefore, the utility model can achieve the beneficial effects of cost reduction, no energy consumption pollution, and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a top view of an embodiment of the utility model.

[0040] Figure 2 It is a three-dimensional diagram of an embodiment of the utility model.

[0041] Figure 3 This is a schematic diagram of the structure of an embodiment of the utility model Figure 1 .

[0042] Figure 4 This is a schematic diagram of the structure of an embodiment of the utility model Figure 2 .

[0043] Figure 5 This is a schematic diagram of the structure of an embodiment of the utility model Figure 3 .

[0044] Figure 6 This is a schematic diagram of the structure of an embodiment of the utility model Figure 4 .

[0045] Figure 7 This is a schematic diagram of the structure of an embodiment of the utility model Figure 5 .

[0046] Figure 8 This is a partial structural decomposition diagram of an embodiment of the utility model Figure 1 .

[0047] Fig. 9 This is a partial structural decomposition diagram of an embodiment of the utility model Figure 2 .

[0048] Fig.10 This is a partial structural decomposition diagram of an embodiment of the utility model Figure 3 .

[0049] Fig.11 This is a three-dimensional diagram of the pins and small load of an embodiment of the utility model.

[0050] Fig.12This is a schematic diagram of the pin and small load structure decomposition of an embodiment of the utility model.

[0051] Fig.13 The utility model is a schematic diagram of the three-dimensional and side views of the pin power terminal card slot and the plug-in power line head.

[0052] Fig.14 This is a top view of another embodiment of the utility model.

[0053] Fig.15 This is a three-dimensional diagram of another embodiment of the utility model.

[0054] Fig.16 Another embodiment of the present invention is shown in FIG. Figure 1 .

[0055] Fig.17 Another embodiment of the present invention is shown in FIG. Figure 2 .

[0056] Fig.18 Another embodiment of the present invention is shown in FIG. Figure 3 .

[0057] Fig.19 Another embodiment of the present invention is a partial structural decomposition diagram Figure 1 .

[0058] Fig. 20 Another embodiment of the present invention is a partial structural decomposition diagram Figure 2 .

[0059] Fig.21 Another embodiment of the present invention is a partial structural decomposition diagram Figure 3 .

[0060] Fig. 22 Another embodiment of the present invention is a partial structural decomposition diagram Figure 4 .

[0061] Fig.23 Another embodiment of the present invention is a partial structural decomposition diagram Figure 5 .

[0062] Fig.24 This is a three-dimensional diagram of the pins and small load of another embodiment of the utility model.

[0063] Fig.25 This is a schematic diagram of the pin and small load structure decomposition of another embodiment of the utility model.

[0064] Reference numerals:

[0065] 1 Upper shell, 1A power line clamp slot, 1B small load (thermistor) through hole, 1C pin crimping auxiliary rib, 1D circuit board slot, 1E upper shell fixing riveting column;

[0066] 2 middle shell, 2A structural hole, 2B small load (thermistor) through slot, 2C aluminum tube through hole, 2D limit fixing hole;

[0067] 3 lower shell, 3A power line card slot auxiliary position, 3B small load (thermistor) through the slot, 3C pin auxiliary ribs, 3D circuit board slot, 3E lower shell fixing riveting hole;

[0068] 4 The first pin, 4A the power supply end card slot, 4B the circuit board end elastic contact pin;

[0069] 5 The second pin, 5A is the elastic contact pin at the small load end, 5B is the elastic contact pin at the circuit board end;

[0070] 6 The third pin, 6A is the elastic contact pin at the small load end, 6B is the elastic contact pin at the circuit board end, and 6C is the wire slot at the power supply end;

[0071] 7 The fourth pin, 7A the power supply end card slot, 7B the circuit board end elastic contact pin;

[0072] 8 ceramic heat sink, 8A ceramic heat dissipation hole, 8B thermistor storage slot;

[0073] 9. Double-sided circuit board with switches, indicator lights and other functions;

[0074] 10 small load (thermistor), 10A small load power supply contact surface;

[0075] 11 Aluminum tube. DETAILED DESCRIPTION

[0076] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different nouns to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. As mentioned in the entire specification and claims, "including" and "comprising" are open-ended terms, so they should be interpreted as "including but not limited to" and "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. The subsequent description of the specification is a preferred embodiment of the present application, but the description is for the purpose of illustrating the general principles of the present application, and is not used to limit the scope of the present application. The scope of protection of the present application shall be subject to that defined in the attached claims.

[0077] The detailed description and technical contents of the present invention are described as follows with reference to the accompanying drawings, which are only provided for reference and explanation and are not intended to limit the present invention.

[0078] like Figures 1 to 12 As shown, an embodiment (embodiment 1) of a plug-in heating element integrated module of the utility model comprises: an upper shell 1, a middle shell 2, a lower shell 3 and pins, the pins are made of metal material, the pins are fixed in the upper shell 1, and both ends of the pins are exposed from the upper shell 1 for circuit connection. The pins are fixed to the upper shell 1 by injection molding of insert plastic sealing, and the pins do not need a special fixing method and can be completely fixed to the upper shell.

[0079] The upper shell 1 and the lower shell 3 are fixedly connected, one end of the middle shell 2 is clamped and fixed between the upper shell 1 and the lower shell 3, and the other end of the middle shell 2 is used to carry the ceramic heat sink and the aluminum tube.

[0080] There are three pins, including: the first pin 4, the second pin 5 and the third pin 6.

[0081] The first pin 4 includes: a power supply end clamping groove 4A and a circuit board end elastic contact pin 4B. The power supply end clamping groove 4A and the circuit board end elastic contact pin 4B are respectively arranged at both ends of the first pin 4. The power supply end clamping groove 4A is used to achieve circuit connection with the power line by plugging. The circuit board end elastic contact pin 4B is bent and elastic, so that the circuit board end elastic contact pin 4B can be pressed and contacted with the circuit contact surface of the circuit board to achieve circuit connection.

[0082] The second pin 5 includes: a small load end elastic contact pin 5A and a circuit board end elastic contact pin 5B. The small load end elastic contact pin 5A and the circuit board end elastic contact pin 5B are respectively arranged at the two ends of the second pin 5. The small load end elastic contact pin 5A and the circuit board end elastic contact pin 5B are both bent and elastic, so that the small load end elastic contact pin 5A can be pressed and contacted with the small load power supply contact surface to achieve circuit connection, and the circuit board end elastic contact pin 5B can be pressed and contacted with the circuit contact surface of the circuit board to achieve circuit connection.

[0083] The third pin 6 includes: an elastic contact pin 6A at the small load end, an elastic contact pin 6B at the circuit board end, and a wire slot 6C at the power supply end. The elastic contact pin 6A at the small load end and the wire slot 6C at the power supply end are respectively arranged on both sides of one end of the third pin 6, and the elastic contact pin 6B at the circuit board end is arranged at the other end of the third pin 6. The elastic contact pin 6A at the small load end is bent and elastic, so that the elastic contact pin 6A at the small load end can be pressed and contacted with the contact surface of the small load power supply to realize circuit connection. The wire slot 6C at the power supply end is used to realize circuit connection with the power line by plugging. The elastic contact pin 6B at the circuit board end is bent and elastic, so that the elastic contact pin 6B at the circuit board end can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection.

[0084] The upper shell 1 is provided with two power cord card slot holes 1A, and the lower shell 3 is provided with two power cord card slot auxiliary positions 3A. The power cord card slot auxiliary position 3A is a hollow slot, and two protruding ribs are provided on both sides of the slot that can extend into the power cord card slot hole 1A. The power cord card slot hole 1A and the power cord card slot auxiliary position 3A are arranged correspondingly. The power end card slot 4A of the first pin is arranged in a pair of power cord card slot holes 1A and the power cord card slot auxiliary position 3A and is sandwiched between the two protruding ribs. The power end card slot 6C of the third pin is arranged in another pair of power cord card slot holes 1A and the power cord card slot auxiliary position 3A and is sandwiched between the two protruding ribs.

[0085] The upper shell 1 is provided with a small load (thermistor) through hole 1B and a pin crimping auxiliary rib 1C, the middle shell 2 is provided with a small load (thermistor) through slot 2B, and the lower shell 3 is provided with a small load (thermistor) through slot 3B; the small load (thermistor) through hole 1B, the small load (thermistor) through slot 2B, and the small load (thermistor) through slot 3B are correspondingly arranged for the small load (thermistor) to pass through; the pin crimping auxiliary rib 1C is arranged on both sides of the small load (thermistor) through hole 1B, for supporting the small load end elastic contact foot 5A and the small load end elastic contact foot 6A, so as to provide auxiliary force for the small load end elastic contact foot 5A and the small load end elastic contact foot 6A.

[0086] In this embodiment, the first pin 4, the second pin 5 and the third pin 6 are fixed to the upper shell 1 by injection molding of insert plastic sealing, and only the two ends that need to be connected to the power line, the circuit board and the small load circuit are exposed. The three pins can be completely fixed to the upper shell 1 without any special fixing method; the elastic contact pins of the small load end of the second pin 5 and the third pin 6 are connected to the small load by crimping contact to achieve circuit connection; the pin power end of the first pin 4 and the third pin 6 is connected to the power line by plugging in the card slot; this makes it unnecessary to connect the power line through soldering when connecting the power supply and assembling the small load (thermistor), avoiding the high energy consumption and high pollution caused by connecting the power line through soldering, and the plugging method is used to achieve circuit connection with the power line, and the crimping contact method is used to achieve circuit connection with the small load and the circuit board, without the help of any consumables, and the plugging and crimping can be completed manually, which reduces costs, eliminates energy consumption and pollution, and improves production efficiency.

[0087] In Embodiment 1, the lower housing 3 is provided with three pin auxiliary ribs 3C for supporting the circuit board end elastic contact pins (4B, 5B, 6B) of the three pins to provide auxiliary force for the circuit board end elastic contact pins.

[0088] Embodiment 1 further comprises: a ceramic heat sink 8, a small load (thermistor) 10 and an aluminum tube 11. The ceramic heat sink 8 comprises: a ceramic heat sink hole 8A and a thermistor receiving groove 8B. The middle housing 2 is provided with an aluminum tube passing hole 2C.

[0089] The aluminum tube through hole 2C and the ceramic heat dissipation hole 8A are correspondingly arranged. The aluminum tube 11 passes through the aluminum tube through hole 2C and the ceramic heat dissipation hole 8A in sequence, and is used to fix the ceramic heat sink 8 to the middle shell 2. The thermistor accommodating groove 8B is sleeved on the outside of the pin crimping auxiliary rib 1C of the upper shell 1, and the small load (thermistor) 10 is sandwiched between the small load end elastic contact pin 5A and the small load end elastic contact pin 6A, and the small load end elastic contact pin 5A and the small load end elastic contact pin 6A are kept in contact with the small load power supply contact surface 10A set on the two surfaces of the small load (thermistor) 10, so that the ceramic heat sink 8 can receive the heat emitted by the small load (thermistor) 10.

[0090] In the first embodiment, the upper housing 1 is provided with a circuit board insertion slot 1D, and the lower housing 3 is provided with a circuit board insertion slot 3D. The circuit board insertion slot 1D and the circuit board insertion slot 3D are provided correspondingly for accommodating circuit boards.

[0091] Embodiment 1 also includes: a circuit board, which is inserted into the circuit board slot 1D and the circuit board slot 3D, and the circuit contact surface of the circuit board contacts the elastic contact pins of the circuit board end of the three pins to achieve circuit connection. The circuit board is a double-sided circuit board 9 with a switch, an indicator light and other functions.

[0092] In Example 1, the upper shell 1 is provided with an upper shell fixing rivet column 1E, the middle shell 2 is provided with a limited fixing hole 2D, and the lower shell 3 is provided with a lower shell fixing rivet hole 3E. The upper shell fixing rivet column 1E passes through the limited fixing hole 2D and is inserted into the lower shell fixing rivet hole 3E to rivet and fix the upper shell 1, the middle shell 2 and the lower shell 3 together.

[0093] In Embodiment 1, the middle shell 2 is provided with a structural hole 2A for fixing the entire product including the upper shell 1, the middle shell 2 and the lower shell 3 on the plastic housing.

[0094] Example 1 Circuit connection description:

[0095] The positive power line is inserted into the power end clamping slot 4A of the first pin 4, and the positive power is connected. After the power end clamping slot 4A of the first pin is plugged with the positive power, the positive power is transmitted to the elastic contact pin 4B of the circuit board end of the first pin, and the elastic contact pin 4B of the circuit board end of the first pin transmits the power to the double-sided circuit board 9 with a switch, an indicator light and other functions;

[0096] The switch on the double-sided circuit board 9 with switches, indicator lights and other functions can control the on and off of the entire current, and connect the current in parallel to the elastic contact pin 5B at the circuit board end of the second pin 5 and the indicator light of the circuit board 9, and the on and off of the indicator light indicates the on and off of the power supply;

[0097] The second pin circuit board end elastic contact pin 5B receiving the parallel current conducts the current to the second pin small load end elastic contact pin 5A, and the second pin small load end elastic contact pin 5A contacts the small load power supply contact surface 10A to conduct electricity, so that the current is connected in parallel to the small load (thermistor) 10 on the circuit board;

[0098] Then, the elastic contact pin 6A at the small load end of the third pin 6 contacts the other pole of the small load power supply contact surface 10A to be energized, and the elastic contact pin 6B at the circuit board end contacts the circuit contact surface of the circuit board to be energized, and the current circuit of the elastic contact pin 6A at the small load end and the current circuit of the elastic contact pin 6B at the circuit board end are combined and connected in parallel to the wire clamping slot 6C at the power supply end of the third pin 6, so as to realize parallel extraction of the negative pole of the current;

[0099] Finally, after the negative power line end is inserted into the power end card slot 6C of the third pin 6, the negative pole of the circuit is led out, thereby completing the complete circuit loop.

[0100] The utility model also provides another embodiment (embodiment 2). The difference between embodiment 2 and embodiment 1 is that embodiment 2 has four pins, while embodiment 1 has only three pins. The reduction of pins in embodiment 1 is conducive to reducing product failures caused by poor pin contact.

[0101] like Figures 14 to 25 As shown, another embodiment (embodiment 2) of a plug-in heating element integrated module of the utility model comprises: an upper shell 1, a middle shell 2, a lower shell 3 and pins, the pins are made of metal material, the pins are fixed in the upper shell 1, and both ends of the pins are exposed from the upper shell 1 for circuit connection. The pins are fixed to the upper shell 1 by injection molding of insert plastic sealing, and the pins do not need a special fixing method and can be completely fixed to the upper shell.

[0102] The upper shell 1 and the lower shell 3 are fixedly connected, one end of the middle shell 2 is clamped and fixed between the upper shell 1 and the lower shell 3, and the other end of the middle shell 2 is used to carry the ceramic heat sink and the aluminum tube.

[0103] There are four pins, including: a first pin 4, a second pin 5, a third pin 6 and a fourth pin 7.

[0104] The first pin 4 includes: a power supply end clamping groove 4A and a circuit board end elastic contact pin 4B. The power supply end clamping groove 4A and the circuit board end elastic contact pin 4B are respectively arranged at both ends of the first pin 4. The power supply end clamping groove 4A is used to achieve circuit connection with the power line by plugging. The circuit board end elastic contact pin 4B is bent and elastic, so that the circuit board end elastic contact pin 4B can be pressed and contacted with the circuit contact surface of the circuit board to achieve circuit connection.

[0105] The second pin 5 includes: a small load end elastic contact pin 5A and a circuit board end elastic contact pin 5B. The small load end elastic contact pin 5A and the circuit board end elastic contact pin 5B are respectively arranged at the two ends of the second pin 5. The small load end elastic contact pin 5A and the circuit board end elastic contact pin 5B are both bent and elastic, so that the small load end elastic contact pin 5A can be pressed and contacted with the small load power supply contact surface to achieve circuit connection, and the circuit board end elastic contact pin 5B can be pressed and contacted with the circuit contact surface of the circuit board to achieve circuit connection.

[0106] The third pin 6 includes: a small load end elastic contact pin 6A and a circuit board end elastic contact pin 6B. The small load end elastic contact pin 6A and the circuit board end elastic contact pin 6B are respectively arranged at the two ends of the third pin 6. The small load end elastic contact pin 6A and the circuit board end elastic contact pin 6B are both bent and elastic, so that the small load end elastic contact pin 6A can be pressed and contacted with the small load power supply contact surface to achieve circuit connection, and the circuit board end elastic contact pin 6B can be pressed and contacted with the circuit contact surface of the circuit board to achieve circuit connection.

[0107] The fourth pin 7 includes: a power supply end clamping groove 7A and a circuit board end elastic contact pin 7B. The power supply end clamping groove 7A and the circuit board end elastic contact pin 7B are respectively arranged at two ends of the fourth pin 7. The power supply end clamping groove 7A is used to realize circuit connection with the power line by plugging. The circuit board end elastic contact pin 7B is bent and elastic, so that the circuit board end elastic contact pin 7B can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection.

[0108] The upper shell 1 is provided with two power cord card slot holes 1A, and the lower shell 3 is provided with two power cord card slot auxiliary positions 3A. The power cord card slot auxiliary position 3A is a hollow slot, and two protruding ribs are provided on both sides of the slot that can extend into the power cord card slot hole 1A. The power cord card slot hole 1A and the power cord card slot auxiliary position 3A are arranged correspondingly. The power end card slot 4A of the first pin is arranged in a pair of power cord card slot holes 1A and the power cord card slot auxiliary position 3A and is sandwiched between the two protruding ribs. The power end card slot 7A of the fourth pin is arranged in another pair of power cord card slot holes 1A and the power cord card slot auxiliary position 3A and is sandwiched between the two protruding ribs.

[0109] The upper shell 1 is provided with a small load (thermistor) through hole 1B and a pin crimping auxiliary rib 1C, the middle shell 2 is provided with a small load (thermistor) through slot 2B, and the lower shell 3 is provided with a small load (thermistor) through slot 3B; the small load (thermistor) through hole 1B, the small load (thermistor) through slot 2B, and the small load (thermistor) through slot 3B are correspondingly arranged for the small load (thermistor) to pass through; the pin crimping auxiliary rib 1C is arranged on both sides of the small load (thermistor) through hole 1B, for supporting the small load end elastic contact foot 5A and the small load end elastic contact foot 6A, so as to provide auxiliary force for the small load end elastic contact foot 5A and the small load end elastic contact foot 6A.

[0110] In this embodiment, the first pin 4, the second pin 5, the third pin 6 and the fourth pin 7 are fixed to the upper housing 1 by injection molding of insert plastic sealing, and only the two ends that need to be connected to the power line, the circuit board and the small load circuit are exposed. The four pins can be completely fixed to the upper housing 1 without a special fixing method; the elastic contact pins of the small load end of the second pin 5 and the third pin 6 are connected to the small load by crimping to achieve circuit connection; the pin power end of the first pin 4 and the fourth pin 7 is connected to the power line by plugging in the card slot; this makes it unnecessary to connect the power line through soldering when connecting the power supply and assembling the small load (thermistor), avoiding the high energy consumption and high pollution caused by connecting the power line through soldering, and the plugging method is used to achieve circuit connection with the power line, and the crimping contact method is used to achieve circuit connection with the small load and the circuit board, without the help of any consumables, and the plugging and crimping can be completed manually, which reduces the cost, eliminates energy consumption and pollution, and improves production efficiency.

[0111] In Embodiment 2, the lower shell 3 is provided with four pin auxiliary ribs 3C for supporting the circuit board end elastic contact pins (4B, 5B, 6B, 7B) of the four pins to provide auxiliary force for the circuit board end elastic contact pins.

[0112] Embodiment 2 further comprises: a ceramic heat sink 8, a small load (thermistor) 10 and an aluminum tube 11. The ceramic heat sink 8 comprises: a ceramic heat sink hole 8A and a thermistor receiving groove 8B. The middle housing 2 is provided with an aluminum tube passing hole 2C.

[0113] The aluminum tube through hole 2C and the ceramic heat dissipation hole 8A are correspondingly arranged. The aluminum tube 11 passes through the aluminum tube through hole 2C and the ceramic heat dissipation hole 8A in sequence, and is used to fix the ceramic heat sink 8 to the middle shell 2. The thermistor accommodating groove 8B is sleeved on the outside of the pin crimping auxiliary rib 1C of the upper shell 1, and the small load (thermistor) 10 is sandwiched between the small load end elastic contact pin 5A and the small load end elastic contact pin 6A, and the small load end elastic contact pin 5A and the small load end elastic contact pin 6A are kept in contact with the small load power supply contact surface 10A set on the two surfaces of the small load (thermistor) 10, so that the ceramic heat sink 8 can receive the heat emitted by the small load (thermistor) 10.

[0114] In the second embodiment, the upper housing 1 is provided with a circuit board insertion slot 1D, and the lower housing 3 is provided with a circuit board insertion slot 3D. The circuit board insertion slot 1D and the circuit board insertion slot 3D are provided correspondingly for accommodating circuit boards.

[0115] Embodiment 2 also includes: a circuit board, which is inserted into the circuit board slot 1D and the circuit board slot 3D, and the circuit contact surface of the circuit board contacts the elastic contact pins of the circuit board end of the four pins to achieve circuit connection. The circuit board is a double-sided circuit board 9 with a switch, an indicator light and other functions.

[0116] In Example 2, the upper shell 1 is provided with an upper shell fixing rivet column 1E, the middle shell 2 is provided with a limited fixing hole 2D, and the lower shell 3 is provided with a lower shell fixing rivet hole 3E. The upper shell fixing rivet column 1E passes through the limited fixing hole 2D and is inserted into the lower shell fixing rivet hole 3E to rivet and fix the upper shell 1, the middle shell 2 and the lower shell 3 together.

[0117] In Embodiment 2, the middle shell 2 is provided with a structural hole 2A for fixing the entire product including the upper shell 1, the middle shell 2 and the lower shell 3 on the plastic housing.

[0118] Example 2 Circuit connection instructions:

[0119] The positive power line is inserted into the power end clamping slot 4A of the first pin 4, and the positive power is connected. After the power end clamping slot 4A of the first pin is plugged with the positive power, the positive power is transmitted to the elastic contact pin 4B of the circuit board end of the first pin, and the elastic contact pin 4B of the circuit board end of the first pin transmits the power to the double-sided circuit board 9 with a switch, an indicator light and other functions;

[0120] The switch on the double-sided circuit board 9 with switches, indicator lights and other functions can control the on and off of the entire current, and connect the current in parallel to the elastic contact pin 5B at the circuit board end of the second pin 5 and the indicator light of the circuit board 9, and the on and off of the indicator light indicates the on and off of the power supply;

[0121] The second pin circuit board end elastic contact pin 5B receiving the parallel current conducts the current to the second pin small load end elastic contact pin 5A, and the second pin small load end elastic contact pin 5A contacts the small load power supply contact surface 10A to conduct electricity, so that the current is connected in parallel to the small load (thermistor) 10 on the circuit board;

[0122] Then, the small load end elastic contact pin 6A of the third pin 6 contacts the other pole of the small load power supply contact surface 10A to conduct electricity to the circuit board end elastic contact pin 6B;

[0123] The elastic contact pin 6B at the circuit board end contacts the circuit board circuit contact surface and is energized to realize a parallel circuit of a small load;

[0124] The elastic contact pin 7B of the circuit board end of the fourth pin 7 contacts the circuit contact surface of the circuit board 9 to realize the negative pole circuit of the electrical appliance to be led out;

[0125] The elastic contact pin 7B at the circuit board end conducts the current to the wire clamping slot 7A at the power supply end;

[0126] Finally, after the negative power line end is inserted into the power end card slot 7A of the fourth pin, the negative pole of the circuit is led out, thereby completing the complete circuit loop.

[0127] In the above two embodiments, in order to ensure that the small load (thermistor) 10 is not exposed and the small load can better maintain and stabilize the temperature, thermal insulation sealing glue is added into the thermistor accommodating groove 8B for sealing.

[0128] See also Fig.13 As shown, the pin power terminal wire slot used in the above two embodiments of the utility model includes a slot hole and crimped metal feet at both ends. The crimped metal feet at both ends protrude from the two ends of the slot hole to the middle and to one side of the horizontal plane of the slot hole. There is a slit between the crimped metal feet at both ends, and the slit is for the power line end to be inserted, so that the power terminal wire slot can be connected to the power line.

[0129] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A plug-in heating element integrated module, characterized in that: It includes an upper shell, a middle shell, a lower shell and pins, wherein the pins are fixed to the upper shell by injection molding of insert plastic sealing, and both ends of the pins are exposed to the upper shell; The upper shell and the lower shell are fixedly connected, one end of the middle shell is clamped and fixed between the upper shell and the lower shell, and the other end of the middle shell is used to carry the ceramic heat sink and the aluminum tube; There are three pins, including: a first pin, a second pin and a third pin; The first pin includes: a power supply end clamping groove and a circuit board end elastic contact pin, the power supply end clamping groove and the circuit board end elastic contact pin of the first pin are respectively arranged at two ends of the first pin, the power supply end clamping groove of the first pin is used to realize circuit connection with the power line by plugging, and the circuit board end elastic contact pin of the first pin is bent and elastic, so that the circuit board end elastic contact pin of the first pin can be crimped and contacted with the circuit contact surface of the circuit board to realize circuit connection; The second pin includes: a small load end elastic contact pin and a circuit board end elastic contact pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are respectively arranged at two ends of the second pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are both bent and elastic, so that the small load end elastic contact pin of the second pin can be pressed and contacted with the small load power supply contact surface to realize circuit connection, and the circuit board end elastic contact pin of the second pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection; The third pin comprises: an elastic contact pin at a small load end, an elastic contact pin at a circuit board end, and a wire clamping groove at a power supply end. The elastic contact pin at the small load end and the wire clamping groove at the power supply end of the third pin are respectively arranged at two sides of one end of the third pin, and the elastic contact pin at the circuit board end of the third pin is arranged at the other end of the third pin; the elastic contact pin at the small load end of the third pin is bent and elastic, so that the elastic contact pin at the small load end of the third pin can be pressed and contacted with the contact surface of the small load power supply to realize circuit connection; the wire clamping groove at the power supply end of the third pin is used to realize circuit connection with the power line by plugging; the elastic contact pin at the circuit board end of the third pin is bent and elastic, so that the elastic contact pin at the circuit board end of the third pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection; The upper shell is provided with two power line card slot holes, and the lower shell is provided with two power line card slot auxiliary positions. The power line card slot auxiliary position is a hollow slot, and two protruding ribs are provided on both sides of the slot to be able to extend into the power line card slot holes. The power line card slot holes and the power line card slot auxiliary positions are provided correspondingly. The power end card slot of the first pin is provided in a pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs. The power end card slot of the third pin is provided in another pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs. The upper shell is provided with a small load through hole and a pin crimping auxiliary rib, the middle shell is provided with a small load through groove, and the lower shell is provided with a small load through groove; the small load through hole of the upper shell, the small load through groove of the middle shell, and the small load through groove of the lower shell are correspondingly arranged for the small load to pass through; the pin crimping auxiliary rib is arranged on both sides of the small load through hole, for supporting the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, so as to provide auxiliary force for the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin.

2. The plug-in heating element integrated module according to claim 1, characterized in that: The lower shell is provided with three pin auxiliary ribs for supporting the elastic contact pins of the circuit board end of the three pins to provide auxiliary force for the elastic contact pins of the circuit board end.

3. The plug-in heating element integrated module according to claim 1 or 2, characterized in that: It includes: A ceramic heat sink, a small load and an aluminum tube, wherein the ceramic heat sink comprises: a ceramic heat sink hole and a thermistor accommodating groove, and the middle shell is provided with an aluminum tube passing hole; The aluminum tube through hole and the ceramic heat dissipation hole are arranged correspondingly; the aluminum tube passes through the aluminum tube through hole and the ceramic heat dissipation hole in sequence, and is used to fix the ceramic heat sink to the middle shell; the thermistor accommodating groove is sleeved on the outside of the pin crimping auxiliary rib of the upper shell, and the small load is sandwiched between the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, and the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin are kept in contact with the small load power supply contact surfaces set on two surfaces of the small load respectively.

4. The plug-in heating element integrated module as claimed in claim 3, characterized in that: It includes a circuit board; The upper shell is provided with a circuit board slot, and the lower shell is provided with a circuit board slot, and the circuit board slot of the upper shell and the circuit board slot of the lower shell are arranged correspondingly; The circuit board is inserted into the circuit board insertion slot of the upper shell and the circuit board insertion slot of the lower shell, and the circuit contact surface of the circuit board contacts the elastic contact pins of the circuit board end of the three pins to realize circuit connection.

5. The plug-in heating element integrated module as claimed in claim 4, characterized in that: The upper shell is provided with an upper shell fixing rivet column, the middle shell is provided with a limited fixing hole, and the lower shell is provided with a lower shell fixing rivet hole. The upper shell fixing rivet column passes through the limited fixing hole and is inserted into the lower shell fixing rivet hole to rivet and fix the upper shell, the middle shell and the lower shell together.

6. The plug-in heating element integrated module as claimed in claim 5, characterized in that: The middle shell is provided with a structural hole for fixing the plug-in type heating element integrated module including the upper shell, the middle shell and the lower shell on the plastic shell.

7. A plug-in heating element integrated module, characterized in that: It includes an upper shell, a middle shell, a lower shell and pins, the pins are fixed to the upper shell by injection molding of insert plastic sealing, and both ends of the pins are exposed to the upper shell; The upper shell and the lower shell are fixedly connected, one end of the middle shell is clamped and fixed between the upper shell and the lower shell, and the other end of the middle shell is used to carry the ceramic heat sink and the aluminum tube; There are four pins, including: a first pin, a second pin, a third pin and a fourth pin; The first pin includes: a power supply end clamping groove and a circuit board end elastic contact pin, the power supply end clamping groove and the circuit board end elastic contact pin of the first pin are respectively arranged at two ends of the first pin, the power supply end clamping groove of the first pin is used to realize circuit connection with the power line by plugging, and the circuit board end elastic contact pin of the first pin is bent and elastic, so that the circuit board end elastic contact pin of the first pin can be crimped and contacted with the circuit contact surface of the circuit board to realize circuit connection; The second pin includes: a small load end elastic contact pin and a circuit board end elastic contact pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are respectively arranged at two ends of the second pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the second pin are both bent and elastic, so that the small load end elastic contact pin of the second pin can be pressed and contacted with the small load power supply contact surface to realize circuit connection, and the circuit board end elastic contact pin of the second pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection; The third pin includes: a small load end elastic contact pin and a circuit board end elastic contact pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the third pin are respectively arranged at two ends of the third pin, the small load end elastic contact pin and the circuit board end elastic contact pin of the third pin are both bent and elastic, so that the small load end elastic contact pin of the third pin can be pressed and contacted with the small load power supply contact surface to realize circuit connection, and the circuit board end elastic contact pin of the third pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection; The fourth pin includes: a power supply end card slot and a circuit board end elastic contact pin, the power supply end card slot and the circuit board end elastic contact pin of the fourth pin are respectively arranged at two ends of the fourth pin, the power supply end card slot of the fourth pin is used to realize circuit connection with the power line by plugging, and the circuit board end elastic contact pin of the fourth pin is bent and elastic, so that the circuit board end elastic contact pin of the fourth pin can be pressed and contacted with the circuit contact surface of the circuit board to realize circuit connection; The upper shell is provided with two power line card slot holes, and the lower shell is provided with two power line card slot auxiliary positions. The power line card slot auxiliary position is a hollow slot, and two protruding ribs are provided on both sides of the slot to be able to extend into the power line card slot holes. The power line card slot holes and the power line card slot auxiliary positions are provided correspondingly. The power end card slot of the first pin is provided in a pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs. The power end card slot of the fourth pin is provided in another pair of power line card slot holes and the power line card slot auxiliary positions and sandwiched between the two protruding ribs. The upper shell is provided with a small load through hole and a pin crimping auxiliary rib, the middle shell is provided with a small load through groove, and the lower shell is provided with a small load through groove; the small load through hole of the upper shell, the small load through groove of the middle shell, and the small load through groove of the lower shell are correspondingly arranged for the small load to pass through; the pin crimping auxiliary rib is arranged on both sides of the small load through hole, for supporting the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, so as to provide auxiliary force for the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin.

8. The plug-in heating element integrated module as claimed in claim 7, characterized in that: The lower shell is provided with four pin auxiliary ribs for supporting the elastic contact pins of the circuit board end of the four pins to provide auxiliary force for the elastic contact pins of the circuit board end.

9. The plug-in heating element integrated module according to claim 7 or 8, characterized in that: It includes: A ceramic heat sink, a small load and an aluminum tube, wherein the ceramic heat sink comprises: a ceramic heat sink hole and a thermistor accommodating groove, and the middle shell is provided with an aluminum tube passing hole; The aluminum tube through hole and the ceramic heat dissipation hole are arranged correspondingly; the aluminum tube passes through the aluminum tube through hole and the ceramic heat dissipation hole in sequence, and is used to fix the ceramic heat sink to the middle shell; the thermistor accommodating groove is sleeved on the outside of the pin crimping auxiliary rib of the upper shell, and the small load is sandwiched between the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin, and the elastic contact pin of the small load end of the second pin and the elastic contact pin of the small load end of the third pin are kept in contact with the small load power supply contact surfaces set on two surfaces of the small load respectively.

10. The plug-in heating element integrated module according to claim 9, characterized in that: It includes a circuit board; The upper shell is provided with a circuit board slot, and the lower shell is provided with a circuit board slot, and the circuit board slot of the upper shell and the circuit board slot of the lower shell are arranged correspondingly; The circuit board is inserted into the circuit board insertion slot of the upper shell and the circuit board insertion slot of the lower shell, and the circuit contact surface of the circuit board contacts the elastic contact pins of the circuit board ends of the four pins to realize circuit connection.

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