Microswitch convenient for mounting chip resistor

Abstract

The utility model relates to a microswitch convenient for mounting a chip resistor. The key points of the technical scheme are that the microswitch comprises a housing; a base is arranged in the shell; a switching mechanism is arranged on the base; a mounting groove is formed in the base; the mounting groove is communicated with the switch mechanism; according to the invention, the internal space of the microswitch can be fully utilized, so that the independent microswitch has a resistance signal; and the chip resistor can be prevented from falling off due to collision when the microswitch is assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of microswitches, and more specifically, to a microswitch facilitating the installation of a chip resistor. Background Art

[0002] With the rapid development of new energy vehicles, the electric vehicle charging gun, as a key device connecting electric vehicles and charging piles, its safety and reliability are of crucial importance. The microswitch, as an important component for detecting the connection state between the charging gun and the charging interface in the charging gun, its performance directly affects the safety and efficiency of the charging process.

[0003] The commonly seen microswitches on the market are composed of a switch housing and a button arranged on the switch housing. The button transmits the force or stroke from the outside to the relevant components inside the switch housing. Inside the switch housing, there are installed a moving piece, a moving piece contact, a spring, a support rod, terminals connected to an external circuit, and terminal contacts. When the button receives the force or stroke from the outside, it will cause the moving piece to move and contact and conduct with the set relevant terminal contacts, ultimately causing the external circuit connected to the terminals inside the microswitch to conduct or disconnect.

[0004] For the connection methods of the microswitches and resistors inside the existing charging guns on the market, crimping or soldering processes are adopted to connect the microswitches and resistors to the charging gun head wiring harness assembly by crimping or soldering. Since the wiring harness assembly generally has a length of at least more than 3m, this causes the product to complete the assembly process of the microswitches and resistors together with the wiring harness assembly during the assembly process, making the assembly relatively inconvenient, and it is difficult to achieve and unreliable for the microswitches and resistors to be waterproof.

[0005] Chinese Patent Document CN211416990U discloses a microswitch inside an electric vehicle charging gun, including a microswitch, an RC chip resistor, an R4 chip resistor, a PCB circuit board, an injection-molded and encapsulated plastic shell, and an electronic wire. The microswitch, the RC chip resistor, and the R4 chip resistor are all integrally installed on the PCB circuit board. The PCB circuit board is installed inside the injection-molded and encapsulated plastic shell, and the electronic wire is electrically connected to the PCB circuit board.

[0006] However, the microswitch in the prior art needs to additionally set a circuit board outside the microswitch, seriously occupying the internal space of the charging gun and being difficult to meet the actual application requirements. Therefore, there is still room for improvement. Summary of the Utility Model

[0007] Aiming at the deficiencies existing in the prior art, the purpose of the present utility model is to provide a microswitch facilitating the installation of a chip resistor to solve the above technical problems.

[0008] The above technical object of the utility model is achieved through the following technical solutions: A microswitch facilitating the installation of a chip resistor, comprising: a housing; a base is arranged inside the housing; a switch mechanism is arranged on the base; an installation groove is formed on the base; and the installation groove communicates with the switch mechanism.

[0009] By forming an installation groove on the base and making the installation groove communicate with the switch mechanism, the chip resistor can be placed in the installation groove, and the two leads of the chip resistor are electrically connected to the switch mechanism. At this time, the chip resistor is welded to the switch mechanism by using laser welding technology or through solder paste, and the installation of the chip resistor can be completed.

[0010] By welding the chip resistor in the installation groove, on the one hand, the internal space of the microswitch can be fully utilized to enable the single microswitch to carry a resistance signal; on the other hand, it can avoid the chip resistor from being collided and dropped during the assembly of the microswitch.

[0011] Optionally, the switch mechanism includes: a pressing component and a switching component; the pressing component is slidably arranged on the housing; the end of the pressing component extends into the housing and abuts against the switching component; the switching component is arranged on the base; and the switching component communicates with the installation groove.

[0012] By pressing the switching component with the pressing component, the switching state of the microswitch can be switched.

[0013] Optionally, the pressing component includes: a button; a sealing ring is sleeved on the button; the button is slidably arranged on the housing; and the end of the button passes through the housing and abuts against the switching component.

[0014] By pressing the switching component with the button, the switching state of the microswitch can be switched. And by sleeving a sealing ring on the button, it can prevent moisture or dust from entering the microswitch through the gap between the button and the housing, improving the waterproof reliability of the microswitch.

[0015] Optionally, the button includes: a transmission column; a pressing head is arranged at one end of the transmission column, and a U-shaped block is arranged at the other end of the transmission column; the transmission column is slidably arranged on the housing; the sealing ring is arranged on the transmission column; and the U-shaped block abuts against the switching component.

[0016] By pushing the transmission column to move on the housing with the pressing head, driving the U-shaped block to move, and pushing the switching component to switch the switching state of the microswitch.

[0017] Optionally, the switching component includes: a shrapnel; the shrapnel is disposed on the base; the shrapnel abuts against the button; a common terminal is disposed on the base; the common terminal is electrically connected to one end of the shrapnel; a normally open terminal and a normally closed terminal are further disposed on the base; the common terminal, the normally open terminal and the normally closed terminal are all communicated with the mounting groove; when the button is not pressed, the shrapnel is electrically connected to the normally closed terminal; when the button is pressed, the shrapnel is electrically connected to the normally open terminal.

[0018] Specifically, when the button is not pressed, one end of the shrapnel is electrically connected to the common terminal and the other end is electrically connected to the normally closed terminal; after the button is pressed, the shrapnel deforms under the action of the U-shaped block. At this time, one end of the shrapnel is electrically connected to the common terminal and the other end is electrically connected to the normally open terminal. Since the common terminal, the normally open terminal and the normally closed terminal are all communicated with the mounting groove, when mounting the chip resistor on the mounting groove, the chip resistor can be soldered on the common terminal, the normally open terminal and the normally closed terminal, so that when receiving the signal of the micro switch, the micro switch will directly carry the resistance signal.

[0019] Optionally, the shrapnel includes a fixing portion; the fixing portion is electrically connected to the common terminal; the fixing portion is disposed on the base; a connecting portion is disposed at the end of the fixing portion; the connecting portion abuts against the button; a clamping portion is disposed on the connecting portion; when the button is not pressed, the clamping portion is electrically connected to the normally closed terminal; when the button is pressed, the clamping portion is electrically connected to the normally open terminal.

[0020] When the button is not pressed, the connecting portion is in a static state. At this time, the clamping portion contacts the normally closed terminal and is clamped on the normally closed terminal. The normally closed terminal is electrically connected to the common terminal through the clamping portion, the connecting portion and the fixing portion in sequence. When the button is pressed, the connecting portion moves under the action of the button, driving the clamping portion to disengage from the normally closed terminal and move towards the normally open terminal. After the clamping portion contacts the normally open terminal, the clamping portion is clamped to the normally open terminal, and the normally open terminal is electrically connected to the common terminal through the clamping portion, the connecting portion and the fixing portion in sequence.

[0021] Optionally, there are two mounting grooves, namely a first mounting groove and a second mounting groove; a first chip resistor is disposed in the first mounting groove; one end of the first chip resistor is electrically connected to the common terminal and the other end is electrically connected to the normally closed terminal; a second chip resistor is disposed in the second mounting groove; one end of the second chip resistor is electrically connected to the normally closed terminal and the other end is electrically connected to the normally open terminal.

[0022] Specifically, since one end of the first chip resistor is electrically connected to the common terminal and the other end is electrically connected to the normally closed terminal, the common terminal and the normally closed terminal can be electrically connected through the first chip resistor. Since one end of the second chip resistor is electrically connected to the normally closed terminal and the other end is electrically connected to the normally open terminal, the common terminal and the normally open terminal can be electrically connected through the first chip resistor and the second chip resistor. When the normally closed terminal is electrically connected to the common terminal, since the elastic piece electrically connects the common terminal and the normally closed terminal, the first chip resistor is in a short-circuit state. At this time, there is no resistance signal of the first chip resistor between the common terminal and the normally closed terminal, and only the resistance signal of the second chip resistor between the normally closed terminal and the normally open terminal exists. When the normally open terminal is electrically connected to the common terminal, since the elastic piece electrically connects the common terminal and the normally open terminal, both the first chip resistor and the second chip resistor are in a short-circuit state at this time. Therefore, there is no resistance signal of the first chip resistor and the second chip resistor between the common terminal and the normally open terminal. When neither the normally closed terminal nor the normally open terminal is electrically connected to the common terminal, at this time the elastic piece is in the gap position, there is a resistance signal of the first chip resistor between the common terminal and the normally closed terminal, and there are resistance signals of the first chip resistor and the second chip resistor between the common terminal and the normally open terminal.

[0023] By providing the first chip resistor and the second chip resistor, corresponding resistance signals are generated between the normally open terminal and the common terminal and between the normally closed terminal and the common terminal respectively, realizing a single-piece micro switch with a resistance signal.

[0024] Optionally, the sealing ring includes a sealing portion and an embedding portion; a sealing ring is provided on the inner wall of the sealing portion, and the sealing portion and the sealing ring tightly wrap around the outside of the button; the embedding portion is embedded in the housing.

[0025] By wrapping the sealing portion and the sealing ring around the outside of the button and embedding the embedding portion in the housing, the connection between the button and the housing can be sealed, preventing water vapor or dust from entering the micro switch through the gap between the button and the housing, and improving the waterproof reliability of the micro switch.

[0026] In summary, the present invention has the following beneficial effects:

[0027] By welding the chip resistor in the installation groove, on the one hand, the internal space of the micro switch can be fully utilized to make a single micro switch have a resistance signal; on the other hand, it can prevent the chip resistor from being collided and dropped during the assembly of the micro switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is an exploded structural schematic diagram of the present invention;

[0029] Figure 2 is a cross-sectional structural schematic diagram of the present invention;

[0030] Figure 3It is a schematic structural diagram when the common terminal and the normally open terminal are conducting in the present utility model;

[0031] Figure 4 It is a schematic structural diagram when the common terminal and the normally closed terminal are conducting in the present utility model.

[0032] In the figure: 1. Housing; 2. Base; 31. Pressing assembly; 311. Pressing element; 3111. Transmission column; 3112. Pressing head; 3113. C-shaped block; 312. Sealing ring; 3121. Sealing part; 3122. Embedding part; 3123. Sealing ring; 321. Spring piece; 3211. Fixed part; 3212. Connecting part; 3213. Clamping part; 322. Common terminal; 323. Normally open terminal; 324. Normally closed terminal; 4. Installation groove; 5. First chip resistor; 6. Second chip resistor. Specific embodiments

[0033] To make the objectives, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0034] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] The present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] Embodiment 1

[0037] This embodiment provides a micro switch facilitating the installation of chip resistors, as Figures 1-4 shown, including: a housing 1; a base 2 is arranged inside the housing 1; a switch mechanism is arranged on the base 2; an installation groove 4 is opened on the base 2; the installation groove 4 communicates with the switch mechanism.

[0038] By providing an installation groove 4 on the base 2 and connecting the installation groove 4 to the switch mechanism, a chip resistor can be placed in the installation groove 4, and the two leads of the chip resistor can be electrically connected to the switch mechanism. At this time, the chip resistor can be soldered to the switch mechanism using laser soldering technology or solder paste, thus completing the installation of the chip resistor.

[0039] By soldering the chip resistor in the installation groove 4, on the one hand, the internal space of the microswitch can be fully utilized, enabling a single microswitch to carry a resistance signal; on the other hand, it can prevent the chip resistor from being knocked off during the assembly of the microswitch.

[0040] Optionally, the switch mechanism includes: a pressing component 31 and a switching component; the pressing component 31 is slidably disposed on the housing 1; the end of the pressing component 31 extends into the housing 1 and abuts against the switching component; the switching component is disposed on the base 2; the switching component is in communication with the installation groove 4.

[0041] By pressing the switching component with the pressing component 31, the switch state of the microswitch can be toggled.

[0042] Optionally, the pressing component 31 includes: a button 311; a sealing ring 312 is sleeved on the button 311; the button 311 is slidably disposed on the housing 1; the end of the button 311 passes through the housing 1 and abuts against the switching component.

[0043] By pressing the switching component with the button 311, the switch state of the microswitch can be toggled. And by sleeving the sealing ring 312 on the button 311, it can prevent moisture or dust from entering the microswitch through the gap between the button 311 and the housing 1, improving the waterproof reliability of the microswitch.

[0044] Optionally, the switching component includes: a spring piece 321; the spring piece 321 is disposed on the base 2; the spring piece 321 abuts against the button 311; a common terminal 322 is provided on the base 2; the common terminal 322 is electrically connected to one end of the spring piece 321; a normally open terminal 323 and a normally closed terminal 324 are also provided on the base 2; the common terminal 322, the normally open terminal 323, and the normally closed terminal 324 are all in communication with the installation groove 4; when the button 311 is not pressed, the spring piece 321 is electrically connected to the normally closed terminal 324; when the button 311 is pressed, the spring piece 321 is electrically connected to the normally open terminal 323.

[0045] Specifically, when the button 311 is not pressed, one end of the elastic piece 321 is electrically connected to the common terminal 322, and the other end is electrically connected to the normally closed terminal 324. After the button 311 is pressed, the elastic piece 321 deforms under the action of the U-shaped block 3113. At this time, one end of the elastic piece 321 is electrically connected to the common terminal 322, and the other end is electrically connected to the normally open terminal 323. Since the common terminal 322, the normally open terminal 323, and the normally closed terminal 324 are all connected to the mounting groove 4, when mounting the chip resistor on the mounting groove 4, the chip resistor can be soldered on the common terminal 322, the normally open terminal 323, and the normally closed terminal 324. Thus, when receiving the signal of the micro switch, the micro switch will directly carry the resistance signal.

[0046] Optionally, the elastic piece 321 includes a fixing portion 3211; the fixing portion 3211 is electrically connected to the common terminal 322; the fixing portion 3211 is arranged on the base 2; a connecting portion 3212 is arranged at the end of the fixing portion 3211; the connecting portion 3212 abuts against the button 311; a clamping portion 3213 is arranged on the connecting portion 3212; in the case where the button 311 is not pressed, the clamping portion 3213 is electrically connected to the normally closed terminal 324; in the case where the button 311 is pressed, the clamping portion 3213 is electrically connected to the normally open terminal 323.

[0047] In the case where the button 311 is not pressed, the connecting portion 3212 is in a static state. At this time, the clamping portion 3213 contacts the normally closed terminal 324 and is clamped on the normally closed terminal 324. The normally closed terminal 324 is electrically connected to the common terminal 322 through the clamping portion 3213, the connecting portion 3212, and the fixing portion 3211 in sequence. In the case where the button 311 is pressed, the connecting portion 3212 moves under the action of the button 311, driving the clamping portion 3213 to disengage from the normally closed terminal 324 and move towards the normally open terminal 323. After the clamping portion 3213 contacts the normally open terminal 323, the clamping portion 3213 is clamped to the normally open terminal 323. The normally open terminal 323 is electrically connected to the common terminal 322 through the clamping portion 3213, the connecting portion 3212, and the fixing portion 3211 in sequence.

[0048] Optionally, there are two mounting grooves 4, namely a first mounting groove 4 and a second mounting groove 4; a first chip resistor 5 is arranged in the first mounting groove 4; one end of the first chip resistor 5 is electrically connected to the common terminal 322, and the other end is electrically connected to the normally closed terminal 324; a second chip resistor 6 is arranged in the second mounting groove 4; one end of the second chip resistor 6 is electrically connected to the normally closed terminal 324, and the other end is electrically connected to the normally open terminal 323.

[0049] Specifically, since one end of the first chip resistor 5 is electrically connected to the common terminal 322 and the other end is electrically connected to the normally-closed terminal 324, the common terminal 322 and the normally-closed terminal 324 can be electrically connected through the first chip resistor 5. Since one end of the second chip resistor 6 is electrically connected to the normally-closed terminal 324 and the other end is electrically connected to the normally-open terminal 323, the common terminal 322 and the normally-open terminal 323 can be electrically connected through the first chip resistor 5 and the second chip resistor 6. When the normally-closed terminal 324 is electrically connected to the common terminal 322, since the elastic piece 321 electrically connects the common terminal 322 and the normally-closed terminal 324, the first chip resistor 5 is in a short-circuit state. At this time, there is no resistance signal of the first chip resistor 5 between the common terminal 322 and the normally-closed terminal 324, and only the resistance signal of the second chip resistor 6 between the normally-closed terminal 324 and the normally-open terminal 323 exists. When the normally-open terminal 323 is electrically connected to the common terminal 322, since the elastic piece 321 electrically connects the common terminal 322 and the normally-open terminal 323, the first chip resistor 5 and the second chip resistor 6 are both in a short-circuit state at this time. Therefore, there is no resistance signal of the first chip resistor 5 and the second chip resistor 6 between the common terminal 322 and the normally-open terminal 323. When neither the normally-closed terminal 324 nor the normally-open terminal 323 is electrically connected to the common terminal 322, the elastic piece 321 is in the gap position at this time. There is a resistance signal of the first chip resistor 5 between the common terminal 322 and the normally-closed terminal 324, and there are resistance signals of the first chip resistor 5 and the second chip resistor 6 between the common terminal 322 and the normally-open terminal 323.

[0050] By providing the first chip resistor 5 and the second chip resistor 6, corresponding resistance signals are generated between the normally-open terminal 323 and the normally-closed terminal 324 and the common terminal 322 respectively, so that the single-piece micro switch has a resistance signal.

[0051] Embodiment 2

[0052] This embodiment provides a micro switch facilitating the installation of chip resistors. As Figures 1-4 shown, it includes: a housing 1; a base 2 is arranged inside the housing 1; a switch mechanism is arranged on the base 2; an installation groove 4 is formed on the base 2; and the installation groove 4 communicates with the switch mechanism.

[0053] By forming the installation groove 4 on the base 2 and making the installation groove 4 communicate with the switch mechanism, the chip resistor can be placed in the installation groove 4, and the two leads of the chip resistor are electrically connected to the switch mechanism. At this time, by using laser welding technology or soldering the chip resistor on the switch mechanism with solder paste, the installation of the chip resistor can be completed.

[0054] By soldering the chip resistor in the installation groove 4, on the one hand, the internal space of the micro switch can be fully utilized to make the single micro switch have a resistance signal; on the other hand, it can prevent the chip resistor from being collided and dropped during the assembly of the micro switch.

[0055] Optionally, the switch mechanism includes: a pressing component 31 and a switching component; the pressing component 31 is slidably arranged on the housing 1; the end of the pressing component 31 extends into the housing 1 and abuts against the switching component; the switching component is arranged on the base 2; the switching component is communicated with the installation groove 4.

[0056] By pressing the switching component with the pressing component 31, the switch state of the microswitch can be switched.

[0057] Optionally, the pressing component 31 includes: a pressing knob 311; a sealing ring 312 is sleeved on the pressing knob 311; the pressing knob 311 is slidably arranged on the housing 1; the end of the pressing knob 311 passes through the housing 1 and abuts against the switching component.

[0058] By pressing the switching component with the pressing knob 311, the switch state of the microswitch can be switched. And by sleeving the sealing ring 312 on the pressing knob 311, it can prevent moisture or dust from entering the microswitch through the gap between the pressing knob 311 and the housing 1, improving the waterproof reliability of the microswitch.

[0059] Optionally, the pressing knob 311 includes: a transmission column 3111; a pressing head 3112 is arranged at one end of the transmission column 3111, and a C-shaped block 3113 is arranged at the other end of the transmission column 3111; the transmission column 3111 is slidably arranged on the housing 1; the sealing ring 312 is arranged on the transmission column 3111; the C-shaped block 3113 abuts against the switching component.

[0060] By pushing the transmission column 3111 to move on the housing 1 with the pressing head 3112, driving the C-shaped block 3113 to move, and pushing the switching component to switch the switch state of the microswitch.

[0061] Optionally, the switching component includes: a spring piece 321; the spring piece 321 is arranged on the base 2; the spring piece 321 abuts against the pressing knob 311; a common terminal 322 is arranged on the base 2; the common terminal 322 is conducted with one end of the spring piece 321; a normally open terminal 323 and a normally closed terminal 324 are also arranged on the base 2; the common terminal 322, the normally open terminal 323 and the normally closed terminal 324 are all communicated with the installation groove 4; when the pressing knob 311 is not pressed, the spring piece 321 is conducted with the normally closed terminal 324; when the pressing knob 311 is pressed, the spring piece 321 is conducted with the normally open terminal 323.

[0062] Specifically, when the button 311 is not pressed, one end of the elastic piece 321 is electrically connected to the common terminal 322, and the other end is electrically connected to the normally closed terminal 324. After the button 311 is pressed, the elastic piece 321 is deformed under the action of the U-shaped block 3113. At this time, one end of the elastic piece 321 is electrically connected to the common terminal 322, and the other end is electrically connected to the normally open terminal 323. Since the common terminal 322, the normally open terminal 323, and the normally closed terminal 324 are all connected to the installation groove 4, when installing the chip resistor on the installation groove 4, the chip resistor can be soldered on the common terminal 322, the normally open terminal 323, and the normally closed terminal 324, so that when receiving the signal of the micro switch, the micro switch will directly carry the resistance signal.

[0063] Optionally, the elastic piece 321 includes a fixing portion 3211; the fixing portion 3211 is electrically connected to the common terminal 322; the fixing portion 3211 is disposed on the base 2; a connecting portion 3212 is provided at the end of the fixing portion 3211; the connecting portion 3212 abuts against the button 311; a clamping portion 3213 is provided on the connecting portion 3212; when the button 311 is not pressed, the clamping portion 3213 is electrically connected to the normally closed terminal 324; when the button 311 is pressed, the clamping portion 3213 is electrically connected to the normally open terminal 323.

[0064] When the button 311 is not pressed, the connecting portion 3212 is in a static state. At this time, the clamping portion 3213 contacts the normally closed terminal 324 and is clamped on the normally closed terminal 324. The normally closed terminal 324 is electrically connected to the common terminal 322 through the clamping portion 3213, the connecting portion 3212, and the fixing portion 3211 in sequence. When the button 311 is pressed, the connecting portion 3212 moves under the action of the button 311, driving the clamping portion 3213 to disengage from the normally closed terminal 324 and move toward the normally open terminal 323. After the clamping portion 3213 contacts the normally open terminal 323, the clamping portion 3213 is clamped to the normally open terminal 323, and the normally open terminal 323 is electrically connected to the common terminal 322 through the clamping portion 3213, the connecting portion 3212, and the fixing portion 3211 in sequence.

[0065] Optionally, there are two installation grooves 4, namely a first installation groove 4 and a second installation groove 4; a first chip resistor 5 is disposed in the first installation groove 4; one end of the first chip resistor 5 is electrically connected to the common terminal 322, and the other end is electrically connected to the normally closed terminal 324; a second chip resistor 6 is disposed in the second installation groove 4; one end of the second chip resistor 6 is electrically connected to the normally closed terminal 324, and the other end is electrically connected to the normally open terminal 323.

[0066] Specifically, since one end of the first chip resistor 5 is electrically connected to the common terminal 322 and the other end is electrically connected to the normally-closed terminal 324, the common terminal 322 and the normally-closed terminal 324 can be electrically connected through the first chip resistor 5. Since one end of the second chip resistor 6 is electrically connected to the normally-closed terminal 324 and the other end is electrically connected to the normally-open terminal 323, the common terminal 322 and the normally-open terminal 323 can be electrically connected through the first chip resistor 5 and the second chip resistor 6. When the normally-closed terminal 324 is electrically connected to the common terminal 322, since the elastic piece 321 electrically connects the common terminal 322 and the normally-closed terminal 324, the first chip resistor 5 is in a short-circuit state. At this time, there is no resistance signal of the first chip resistor 5 between the common terminal 322 and the normally-closed terminal 324, and only the resistance signal of the second chip resistor 6 between the normally-closed terminal 324 and the normally-open terminal 323 exists. When the normally-open terminal 323 is electrically connected to the common terminal 322, since the elastic piece 321 electrically connects the common terminal 322 and the normally-open terminal 323, the first chip resistor 5 and the second chip resistor 6 are both in a short-circuit state at this time. Therefore, there is no resistance signal of the first chip resistor 5 and the second chip resistor 6 between the common terminal 322 and the normally-open terminal 323. When neither the normally-closed terminal 324 nor the normally-open terminal 323 is electrically connected to the common terminal 322, the elastic piece 321 is in a gap position at this time. There is a resistance signal of the first chip resistor 5 between the common terminal 322 and the normally-closed terminal 324, and there are resistance signals of the first chip resistor 5 and the second chip resistor 6 between the common terminal 322 and the normally-open terminal 323.

[0067] By providing the first chip resistor 5 and the second chip resistor 6, corresponding resistance signals are generated between the normally-open terminal 323 and the normally-closed terminal 324 and the common terminal 322 respectively, realizing a single-piece micro switch with a resistance signal.

[0068] Optionally, the sealing ring 312 includes a sealing portion 3121 and an embedding portion 3122; a sealing ring 3123 is provided on the inner wall of the sealing portion 3121, and the sealing portion 3121 and the sealing ring 3123 tightly wrap around the outside of the button 311; the embedding portion 3122 is embedded in the housing 1.

[0069] By wrapping the sealing portion 3121 and the sealing ring 3123 around the outside of the button 311 and embedding the embedding portion 3122 in the housing 1, the connection between the button 311 and the housing 1 can be sealed, preventing moisture or dust from entering the micro switch through the gap between the button 311 and the housing 1, and improving the waterproof reliability of the micro switch.

[0070] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A micro switch that is convenient for installing a chip resistor, characterized in that: Comprising: A housing; a base is arranged inside the housing; a switching mechanism is arranged on the base; an installation groove is formed on the base; the installation groove communicates with the switching mechanism.

2. A micro switch for facilitating installation of a chip resistor according to claim 1, characterized in that: The switching mechanism includes: a pressing component and a switching component; the pressing component is slidably arranged on the housing; the end of the pressing component extends into the housing and abuts against the switching component; the switching component is arranged on the base; the switching component communicates with the installation groove.

3. A micro switch for facilitating installation of a chip resistor according to claim 2, characterized in that: The pressing component includes: a button; a sealing ring is sleeved on the button; the button is slidably arranged on the housing; the end of the button passes through the housing and abuts against the switching component.

4. A micro switch for facilitating installation of a chip resistor according to claim 3, characterized in that: The button includes: a transmission column; a pressing head is arranged at one end of the transmission column, and a U-shaped block is arranged at the other end of the transmission column; the transmission column is slidably arranged on the housing; the sealing ring is arranged on the transmission column; the U-shaped block abuts against the switching component.

5. A micro switch for facilitating installation of a chip resistor according to claim 3, characterized in that: The switching component includes: a shrapnel; the shrapnel is arranged on the base; the shrapnel abuts against the button; a common terminal is arranged on the base; the common terminal is electrically connected to one end of the shrapnel; a normally open terminal and a normally closed terminal are also arranged on the base; the common terminal, the normally open terminal and the normally closed terminal are all communicated with the installation groove; when the button is not pressed, the shrapnel is electrically connected to the normally closed terminal; when the button is pressed, the shrapnel is electrically connected to the normally open terminal.

6. A micro switch for facilitating installation of a chip resistor according to claim 5, characterized in that: The shrapnel includes a fixing part; the fixing part is electrically connected to the common terminal; the fixing part is arranged on the base; a connecting part is arranged at the end of the fixing part; the connecting part abuts against the button; a clamping part is arranged on the connecting part; when the button is not pressed, the clamping part is electrically connected to the normally closed terminal; when the button is pressed, the clamping part is electrically connected to the normally open terminal.

7. A micro switch for facilitating installation of a chip resistor according to claim 5, characterized in that: There are two installation grooves, namely a first installation groove and a second installation groove; a first chip resistor is arranged in the first installation groove; one end of the first chip resistor is electrically connected to the common terminal, and the other end is electrically connected to the normally closed terminal; a second chip resistor is arranged in the second installation groove; one end of the second chip resistor is electrically connected to the normally closed terminal, and the other end is electrically connected to the normally open terminal.

8. A micro switch for facilitating installation of a chip resistor according to claim 3, characterized in that: The sealing ring includes: a sealing part and an embedding part; a sealing ring is arranged on the inner wall of the sealing part, and the sealing part and the sealing ring tightly wrap the outside of the button; the embedding part is embedded in the housing.

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