TWI582797B - Composite variable resistor - Google Patents

Description

Compound variable resistor

The present invention relates to a composite variable resistor, and more particularly to a composite variable resistor made by using a combination of an insulating spacer and a conductive diaphragm.

In daily life, it is often seen to control the size of the voltage output signal, such as a variable resistor, and the variable resistor is distinguished according to the mode of operation, which can be roughly divided into a rotary variable resistor and a straight Sliding variable resistor.

Please participate in the first figure. The first figure shows a schematic exploded view of the prior art variable resistor. As shown, a variable resistor PA100 includes a cover PA1, two fasteners PA2, two rails PA3, a type of material PA4, and a circuit base PA5. The fasteners PA2 each have two positioning grooves PA21, and the shape PA4 has a shape body PA41, a two-folder PA42 and a slider PA43. The two guide rails PA3 are respectively disposed through the two through holes PA411 of the shape body PA41, and are inserted into the two positioning grooves PA21 of the two fasteners PA2. Then, the shape PA4 will be inserted into the cover PA1 together with the two guide rails PA3 and the two fasteners PA2, and the slider PA43 will pass through the limiting hole of the cover PA1 for the user to move by the slider PA43. And controlling the resistance of the flipper PA42 to the circuit base PA5 The road (not shown) generates different voltage output signals.

As described above, since the existing variable resistor PA100 contacts the resistance circuit by using the flipper PA42, the resistance portion of the resistor circuit is mainly formed by the carbon film; therefore, when the user operates the slider PA43 to move When the folding sub-PA42 moves, the folding sub-PA42 will continue to rub the carbon film. Over time, the carbon film will be scraped off by the folding sub- PA42, thereby invalidating the entire variable resistor PA100.

In view of the prior art, since the variable resistor is generally in contact with the carbon film resistor on the resistor circuit, the carbon film on the resistor circuit is likely to be broken and twisted after long-term use. The wear of the sub-friction contacts is lost, which in turn makes the entire variable resistor gradually insensitive or even ineffective.

Accordingly, the main object of the present invention is to provide a composite variable resistor for separating a conductive diaphragm and a resistor circuit by using an insulating spacer, and passing the conductive diaphragm through the insulating spacer through the pressing of the steering assembly. The perforations are electrically contacted to the resistive circuit.

In view of the above, the present invention provides a composite variable resistor for solving the problems of the prior art, and includes a circuit base, an insulating spacer, a conductive diaphragm, and a cover. And a control component. The circuit base has at least one resistive circuit extending in an operational direction. The insulating spacer is disposed on the circuit base and has at least one through hole extending in the operating direction, and the through hole corresponds to the resistance circuit. The conductive film is disposed on the insulating spacer and has a conductive surface and an abutting surface disposed opposite to each other. The conductive surface is provided with at least one conductive coating extending in the operating direction, and the conductive coating corresponds to the through hole and the resistor circuit. The cover is fixedly disposed on the circuit base and has an operation space. The control component is slidably disposed in the operation space and is pressed against the abutting surface of the conductive film to deform the conductive film through the through hole, thereby electrically contacting the conductive coating to the resistance circuit. Wherein, the position of the conductive coating electrical contact resistance circuit changes with the slip of the control component, thereby generating a corresponding voltage signal. Thereby, the control component can be effectively prevented from directly contacting the resistance circuit, thereby increasing the service life of the resistance circuit, and since the insulating spacer and the conductive diaphragm are disposed on the circuit base, the resistance on the circuit base is caused. The circuit and the conductive coating disposed on the conductive film can be protected by the conductive film and the substrate body of the circuit base, thereby achieving waterproof and dustproof effects.

An auxiliary technical means derived from the above-mentioned technical means is that the circuit base comprises a substrate and a circuit layer. The substrate is provided with a power input pin, a ground pin and a signal output pin. The circuit layer is formed on the substrate and has a resistor circuit and an electrical contact. The two ends of the resistor circuit are electrically connected to the power input pin and the ground pin respectively, and the electrical contact is electrically connected to the signal output. Pin. Preferably, the conductive coating further has an electrical connection portion electrically connected to the electrical contact.

An auxiliary technical means derived from the above-mentioned technical means is that the cover comprises a cover body and a guiding component. The guiding component comprises two side fasteners and at least one rail. The two side card fasteners are respectively disposed on two sides of the operation space, and the two side card fasteners are all provided with at least one positioning slot. The guide rails are respectively inserted into the positioning slots of the two side fasteners, and the control components are slidably disposed on the guide rails.

An auxiliary technical means derived from the above-mentioned technical means is that the cover system has a limiting hole, and the operating component comprises a type, a pressing part and a sliding handle. The type of system is slidably disposed on the guide rail. The pressing member is coupled to the molded article and pressed against the conductive film. The slider is coupled to the shape and is threaded through the limiting hole.

An auxiliary technical means derived from the above-mentioned necessary technical means is that the conductive film is composed of polyethylene terephthalate.

The specific embodiments of the present invention will be further described by the following examples and drawings.

PA100‧‧‧Variable Resistors

PA1‧‧‧ shell cover

PA2‧‧‧ card firmware

PA21‧‧‧ positioning slot

PA3‧‧‧ rail

PA4‧‧‧ type

PA41‧‧‧ type object

PA411‧‧‧Perforation

PA42‧‧‧折动子

PA43‧‧‧ slider

PA5‧‧‧ circuit base

100‧‧‧Composite variable resistor

1‧‧‧circuit base

11‧‧‧Substrate

111‧‧‧ Grounding pin

112‧‧‧Power input pin

113‧‧‧Signal output pin

12‧‧‧ circuit layer

121‧‧‧Resistor circuit

122‧‧‧Electrical contacts

2‧‧‧Insulated partition gasket

21‧‧‧Perforation

3‧‧‧Electrical diaphragm

31‧‧‧ Conductive surface

311‧‧‧ Conductive coating

3111‧‧‧Electrical connection

32‧‧‧Abutment

4‧‧‧Shell cover

41‧‧‧Shell body

411‧‧‧ Limit hole

42‧‧‧Guide components

421‧‧‧ Side card firmware

4211‧‧‧ positioning slot

422‧‧‧rails

5‧‧‧Control components

51‧‧‧ Type

52‧‧‧Resistance parts

53‧‧‧Sliding handle

D1‧‧‧Operation direction

CS‧‧‧Operating space

The first figure shows a schematic exploded view of a prior art variable resistor; the second figure shows a perspective view of a composite variable resistor according to a preferred embodiment of the present invention; and the third figure shows a preferred embodiment of the present invention. A perspective exploded view of a composite variable resistor provided by the example; and a fourth perspective view showing another perspective view of the composite variable resistor provided by the preferred embodiment of the present invention.

Please refer to the second to fourth figures. The second figure shows a perspective view of a composite variable resistor according to a preferred embodiment of the present invention. The third figure shows the preferred embodiment of the present invention. A perspective exploded view of a composite variable resistor; and a fourth perspective view showing a perspective exploded view of a composite variable resistor according to a preferred embodiment of the present invention.

As shown, a composite variable resistor 100 includes a circuit base 1, an insulating spacer 2, a conductive diaphragm 3, a cover 4, and a steering assembly 5.

The circuit base 1 includes a substrate 11 and a circuit layer 12. The substrate 11 is provided with two ground pins 111, two power input pins 112 and a signal output pin 113. The circuit layer 12 is formed on the substrate 11 and has a two-resist circuit 121 and two electrical contacts 122. The resistor circuit 121 extends in an operating direction D1, and the two ends of the resistor circuit 121 are electrically connected to the ground pin 111 and the power input pin 112 respectively, and the electrical contact 122 is electrically connected to the ground pin. 113. In practical use, the circuit layer 12 forms a resistive circuit 121 and an electrical contact 122 on the substrate 11 in a printed manner, for example, and the ground pin 111, the power input pin 112, and the signal output pin 113 are disposed through The substrate 11 is electrically connected to both ends of the resistor circuit 121 and the electrical contacts 122, respectively.

The insulating spacer 2 is disposed on the circuit layer 12 of the circuit base 1 and has two through holes 21 extending in the operating direction D1, and the through holes 21 correspond to the resistance circuit 121. In the present embodiment, the insulating spacer 2 is, for example, a double-sided tape, and can be used to be fixed to the circuit base 1.

The conductive film 3 is disposed on the insulating spacer 2, and has a conductive surface 31 and an abutting surface 32 disposed oppositely. The conductive surface 31 is provided with two conductive coatings 311 extending along the operating direction D1, and The conductive coating 311 corresponds to the two through holes 21 and the two resistance circuits 121, respectively. The two conductive coatings 311 respectively have an electrical connection portion 3111 correspondingly electrically contacting the electrical contact 122. In the present embodiment, the conductive film 3 is, for example, an insulating sheet composed of polyethylene terephthalate (PET), and the conductive coating 311 is electrically conductive. The conductive paint is, for example, coated with a silver paste, but is not limited thereto. In other embodiments, the conductive film 3 may be an insulating sheet made of an insulating material such as polyimide. In addition, since the insulating spacer 2 is a double-sided tape in this embodiment, the conductive film 3 can be fixed to the insulating spacer 2, and the conductive coating 311 can be avoided by the adhesion protection of the double-sided tape. The resistance circuit 121 is eroded by moisture and dust.

The cover 4 includes a cover body 41 and a guide assembly 42. The cover body 41 has an operation space CS, and defines a limiting hole 411 communicating with the operation space CS. The cover body 41 is slidably fastened to the circuit base 1 by means of riveting and fastening. The guiding assembly 42 includes two side fasteners 421 and two rails 422. The two side fasteners 421 are respectively disposed on two sides of the operation space CS, and the two side fasteners 421 are respectively provided with two positioning slots 4211. The guide rails 422 are respectively inserted into the positioning slots 4211 of the two side fasteners 421. In addition, in other embodiments, the guiding assembly 42 may also be constructed of other rail-type components, and is not limited to the rail-type rails used in the embodiment.

The steering assembly 5 is slidably disposed in the operating space CS, and the steering assembly 5 includes a type 51, two pressing members 52, and a slider 53. The profile 51 is slidably disposed on the two guide rails 422. The pressing member 52 is fixedly coupled to the pattern 51 and pressed against the abutting surface 32 of the conductive film 3 to deform the conductive film 3 through the through hole 21, thereby electrically contacting the conductive coating 311 to the resistor. The resistance on circuit 121. The slider 53 is coupled to the pattern 51 and is disposed through the limiting hole 411. In this embodiment, the pressing member 52 is a folding member. However, in other embodiments, the pressing member 52 can also be a protruding piece, and the pressing member 52 can be integrally coupled to the shape 51, even slippery. The handle 53 can also be integrally coupled to the profile 51.

As described above, when the user controls the movement of the slider 53, the pressing member 52 is pressed against the guide. The position of the electric film 3 is moved to change the position of the conductive coating 311 to the resistance circuit 121, and the conductive coating 311 is output through the electrical connection portion 3111, the electrical contact 122, and the signal output pin 113. Corresponding to the voltage signal of the position where the conductive coating 311 is in contact with the resistive circuit 121; at the same time, since the position of the resistive contact between the conductive coating 311 and the resistive circuit 121 is different, there is no friction scraping. Therefore, compared with the prior art, the baffle may be rubbed with the resistive circuit when moving, the present invention can prevent the resistor on the resistive circuit 121 from being scraped by the insulating spacer 2 and the conductive diaphragm 3. In addition, the service life of the composite variable resistor 100 is increased. Further, since the resistance circuit 121 and the conductive coating 311 are located between the substrate 11 of the circuit base 1 and the conductive film 3, the resistance circuit can be effectively prevented. 121 and conductive coating 311 are eroded or contaminated by moisture and dust.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

1‧‧‧circuit base

11‧‧‧Substrate

111‧‧‧ Grounding pin

12‧‧‧ circuit layer

121‧‧‧Resistor circuit

122‧‧‧Electrical contacts

2‧‧‧Insulated partition gasket

21‧‧‧Perforation

3‧‧‧Electrical diaphragm

32‧‧‧Abutment

4‧‧‧Shell cover

41‧‧‧Shell body

411‧‧‧ Limit hole

42‧‧‧Guide components

421‧‧‧ Side card firmware

4211‧‧‧ positioning slot

422‧‧‧rails

5‧‧‧Control components

51‧‧‧ Type

53‧‧‧Sliding handle

D1‧‧‧Operation direction

Claims (6)

A composite variable resistor comprising: a circuit base having at least one resistor circuit extending in an operating direction; an insulating spacer pad disposed on the circuit base and having at least one along a perforation extending in a direction of operation, and the perforation corresponds to the resistance circuit; a conductive film disposed on the insulating spacer and having a conductive surface and an abutting surface disposed opposite to each other At least one conductive coating extending in the operating direction, and the conductive coating corresponds to the through hole and the resistor circuit; a cover is fixedly disposed on the circuit base and has an operation space; and The control component is slidably disposed in the operation space, and is pressed against the abutting surface of the conductive film to deform the conductive film to pass through the through hole, thereby electrically contacting the conductive coating The resistor circuit; wherein the position of the conductive coating electrically contacting the resistor circuit varies with the slip of the steering component, thereby generating a corresponding voltage signal. The composite variable resistor of claim 1, wherein the circuit base comprises: a substrate, a power input pin, a ground pin and a signal output pin; and a circuit The layer is formed on the substrate and has the resistor circuit and an electrical contact. The two ends of the resistor circuit are electrically connected to the power input pin and the ground pin respectively. The electrical contact system is Electrically contacting the signal output pin. The composite variable resistor of claim 2, wherein the guide The electrocoat layer further has an electrical connection portion electrically connected to the electrical contact. The composite variable resistor of claim 1, wherein the cover comprises: a cover body; and a guiding component comprising: two side fixing members respectively disposed in the operating space The two side fixing members are respectively provided with at least one positioning groove; and at least one guide rail is respectively inserted into the positioning groove of the two side fixing members, and the control component is Sliding through the guide rail. The composite variable resistor of claim 1, wherein the cover has a limiting hole, and the control component comprises: a type of material that is slidably disposed on the guide rail; A pressing member is coupled to the type of material and pressed against the conductive film; and a slider is coupled to the pattern and is disposed through the limiting hole. The composite variable resistor according to claim 1, wherein the conductive film is made of polyethylene terephthalate.