CN211507254U - Sliding potentiometer - Google Patents

Abstract

The utility model relates to a sliding potentiometer, which comprises a substrate, a shell, a sliding seat and two stop blocks, wherein the lower end surface of the substrate is extended along the length direction and is provided with a circuit configuration surface, the circuit configuration surface is provided with a resistance circuit, the resistance circuit is connected with a terminal base, the shell is in a reverse U shape, the inner end surfaces at both sides of the shell are provided with sub-seat sliding grooves for the sliding of sub-seats from bottom to top along the length direction, and a substrate fixing groove for fixing the substrate, the sliding seat comprises a seat body, a push handle arranged above the seat body and sub-seats fixed in the seat body, the sub-seats are provided with electric brushes relative to the circuit configuration surface, the seat body is movably arranged at the outer side of the shell along the length direction, the sub-seats in the seat body are movably arranged at the sub-seat sliding grooves in the shell along the length direction, the electric brushes are electrically contacted with a resistance circuit on the circuit, the dust-proof device has the effect of preventing dust and foreign matters from entering the shell to cause damage.

Description

Sliding potentiometer

Technical Field

The utility model relates to a slidingtype potentiometre has dustproof, reduces the sliding resistance, improves the efficiency that the slip was felt and extension product life.

Background

A Potentiometer, commonly called a Variable Resistor (VR), is an electronic component having three terminals, wherein two fixed contacts and a sliding contact are provided, and the resistance between the sliding terminal and the two fixed terminals can be changed by sliding, and belongs to a passive component. In daily life, an operation device, such as a potentiometer, is often used to adjust the magnitude of the voltage output signal. The potentiometer can control the current or voltage by adjusting the resistance, and is applied to many electrical products, and common applications include sensors for controlling volume, adjusting light intensity, position or angle, and the like. The potentiometer has various types for changing the resistance value, such as a sliding type and a rotating type, and the sliding type variable resistor generally has a structure design of a sliding base and a substrate, so that the sliding base slides to change the relative position of the sliding base and the substrate, and the resistance value can be continuously changed and adjusted to a required resistance value through the change of the contact point of an electric brush of the sliding base and a resistance carbon diaphragm on the substrate.

Referring to fig. 1, a three-dimensional exploded view of a prior art potentiometer and fig. 2, a vertical sectional view of a prior art potentiometer set, it can be seen that the prior art potentiometer set is mainly composed of a conventional substrate a, a conventional housing B and a conventional slide C, the conventional substrate a extends along a length direction and has a conventional circuit configuration surface D, the conventional circuit configuration surface has a conventional resistance circuit E connecting two side terminals K, the conventional housing B is used as a fixed conventional substrate a, has a sliding space F extending along the length direction with the conventional substrate a, has a sliding groove G extending along the length direction above and communicating with the sliding space F, the conventional slide C is mainly composed of a conventional seat H, a conventional push handle I disposed above the conventional seat H and a conventional brush seat J disposed below the conventional seat H, the conventional seat H is a housing sliding space F movably disposed between the conventional housing B and the conventional substrate a along the length direction, the conventional push handle I is passed through the housing sliding groove G, and the conventional brush J is electrically contacted with the conventional resistance circuit E on the conventional circuit arrangement surface D of the conventional substrate A. The sliding potentiometer (variable resistor) is usually applied to volume control of audio equipment, level control of other electronic equipment, power control, etc. In the potentiometer, the conventional push handle I penetrates through the sliding groove G of the housing, and the conventional housing B needs to be provided with a sliding groove G (strip-shaped opening) for exposing the conventional push handle I. The sliding groove G is a path for dust to enter the interior of the potentiometer. Dust falling into the conventional casing B finally falls on the conventional resistance circuit E on the conventional circuit configuration surface D of the conventional substrate A, the electrical contact between the conventional electric brush J and the conventional resistance circuit E is seriously affected, and when the conventional resistance circuit E is in poor contact with the conventional electric brush J, the potentiometer loses function and is damaged. Particularly, the sliding potentiometer is often used for controlling stage sound equipment, and in the modern day where a concert is held in the beach or outdoors, sand storm, rainwater and the like generated in the beach or outdoors are more likely to cause damage to the sliding potentiometer. Taiwan application No. M295326, entitled "variable resistor with dustproof function", includes: the top surface of the shell is provided with a strip-shaped opening, a dustproof cover is arranged above the strip-shaped opening, and the side direction of the dustproof cover is provided with a transverse opening; at least one sliding rod arranged inside the shell; a sliding seat with through holes movably arranged on the sliding rods in a penetrating way, so that the sliding seat can slide back and forth on the sliding rods, the top of the sliding seat is provided with a curved handle, and the handle is exposed out of the strip-shaped opening and the transverse opening of the shell so as to drive the sliding seat to move back and forth; at least one folding rotor, which is arranged on the bottom surface of the sliding seat and is provided with a contact brush; a base plate, the top surface of which is provided with a resistance carbon diaphragm which is contacted with the contact brush of the folding rotor, and the base plate is jointed with the bottom of the shell; and two gaskets respectively arranged at two ends of the substrate, wherein each gasket is provided with at least one positioning hole for installing two ends of the sliding rods (refer to patent publication data of 2006, 08 and 01). However, the design of dust-proof with the dust-proof cover cannot effectively prevent dust, and is a defect.

Furthermore, in the structure of the sliding potentiometer, the position and the height of the sliding seat are limited only by the shell, the sliding seat can move left and right on the resistance circuit, the mode that the position and the height of the sliding seat are limited only by the shell is adopted, a user often has the phenomenon of uneven hand feeling when moving the sliding seat, namely, the contact pressure between an electric brush on the sliding seat and the resistance circuit is uneven, the friction between the sliding seat and a substrate can directly react on the operation hand feeling of the user, and the surface of the substrate is very rough, so that the user often feels unsmooth operation, the product is easy to damage after long-term use, the service life of the product is influenced, and the loss is avoided. Taiwan M422731, "sliding varistor", comprises a support, a pad, a slide seat, a substrate and a plurality of terminals, wherein the slide seat is slidably disposed on the support, the slide seat is locked with a contact piece, the contact piece is in contact with the substrate, the two pads are respectively provided with a clamping groove, the two ends of the support are clamped, the substrate is engaged with the two pads, the terminals are fixed on the substrate, o-rings are respectively sleeved between the support and the clamping grooves to increase the stability of the support and stabilize the contact pressure between the contact sheet and the substrate, the prior application utilizes a support combined with a sliding seat, and utilizes two pads at two ends of the support to fix the heights of a contact piece on the sliding seat and a substrate, thereby further improving the problem of uneven contact pressure between the sliding seat and the substrate, enabling a user to smoothly slide the variable resistor, and extend the life of the variable resistor [ see patent publication data on date 02/11/2012 ]. Taiwan No. M447581 straight sliding type variable resistor, comprising: a base, comprising: a substrate having a first side and a second side opposite to each other; a conductive circuit arranged on the substrate along an extending direction; a resistance circuit arranged on the substrate along the extending direction and spaced with the conductive circuit; the insulating layers are arranged on the first side edge and the second side edge along the extending direction; and a resistance adjusting component, which is arranged on the base in a manner of moving back and forth along the extending direction and comprises: a sliding type object; a plurality of supporting parts which protrude from the sliding object towards the substrate and correspondingly abut against the insulating layers; and a conductive contact piece, fixed on the sliding object and having a plurality of conductive brushes, the conductive brushes respectively and correspondingly contact the conductive circuit and the resistance circuit, so as to electrically connect the conductive circuit to the resistance circuit; wherein, the supporting portions are abutted against the insulating layers, so as to reduce the resistance of the resistance adjusting element during movement (refer to patent publication data of 2013, 02, 21). Taiwan M496836 a guide rail type variable resistor, comprising: the shell is provided with a limiting hole extending along an operation direction and is provided with an accommodating space communicated with the limiting hole; two side guide rails extending along the operation direction and symmetrically arranged in the accommodating space; two tail end clamping pieces which are symmetrically arranged in the accommodating space and are respectively abutted against the two side edge guide rails, so that the two side edge guide rails and the two tail end clamping pieces are accommodated in the accommodating space in a matched manner; the variable resistor circuit base is combined with the shell cover and is abutted against the two tail end clamping pieces, so that the two tail end clamping pieces and the two side edge guide rails are fixedly arranged in the accommodating space; and a control member, comprising: the first type object is provided with two symmetrically arranged slide rails which are respectively and slidably arranged in the two side edge guide rails; at least one folding element connected to the shaped object and elastically connected to the variable resistance circuit base; and a sliding handle connected to the profile and extending out of the limiting hole [ refer to patent publication data 3/1/2015 ]. It can be seen from the above-mentioned prior application that there are various structures to overcome the above-mentioned drawbacks of the conventional techniques such as uneven hand feeling, irregular operation, easy damage to the product after long-term use, and long-term use, but the structure and components are complicated and still have room for improvement.

In addition, in the application of program-controlled sliding potentiometer, a motor is usually used to drive a belt to drive a push handle, such as taiwan I603346 sliding variable resistor, which includes: a sub-base, which comprises an operation rod, at least one first through hole and at least one Variable Resistor (VR) sub-piece, wherein the operation rod is provided with a clamping hole; a first pillar penetrating the at least one first through hole; two pad members, each pad member including a first pad seat and at least a first protrusion, two ends of the first support abutting against the two first pad seats respectively; the substrate is provided with at least two openings, and the at least one first convex part is embedded in the at least two openings respectively; the two liner components are arranged in the outer frame assembly; a fixing plate fixed on the outer frame assembly and including a long window hole and a shaft hole; a driving member fixed at one end of the fixing plate and including a motor and a driving wheel, wherein the motor has a rotating shaft passing through the shaft hole, and the driving wheel is pivoted on the rotating shaft; the driven member is fixedly arranged at the other end of the fixing plate and comprises a stud and a driven wheel, and the driven wheel is pivoted on the stud; a belt, which is meshed with the driving wheel and the driven wheel respectively; and a belt pad including at least one engaging portion engaged with the engaging hole and a meshing portion meshed with the belt (refer to patent publication data of 10/21/2017). However, the conventional sliding potentiometer with a motor belt adjusts the tightness (tension) of the belt by adjusting the position of the motor seat or the driven wheel (for example, taiwan I603346 sliding variable resistor adjusts the position of the driven wheel), which has the disadvantage that the adjustment is not easy and precise.

In addition, in the prior art, since the potentiometer (variable resistor) is generally in contact with a carbon film resistor on the resistor circuit by using a brush (folding element), after long-term use, the carbon film on the resistor circuit is scraped and worn due to long-term friction contact with the brush, and the potentiometer (variable resistor) becomes insensitive and even fails. In addition, the conventional brush (folding element) is generally formed by stamping a conductive metal sheet into a predetermined angle and shape, and sharp burrs of the conventional brush due to stamping scratch and damage a carbon film on a resistor circuit. The above disadvantages are drawbacks of the prior art, and are a difficult problem to overcome in the industry.

Disclosure of Invention

The utility model aims at providing a slidingtype potentiometre.

The utility model aims at realizing through the following technical scheme:

a sliding potentiometer comprises a substrate 1, a housing 2, a sliding seat 3 and two stoppers 4, wherein the lower end surface of the substrate 1 is extended along the length direction to form a circuit configuration surface 10, the circuit configuration surface 10 is provided with a resistance circuit 11, the resistance circuit 11 is connected with a terminal base 12, the housing 2 is in a reverse U shape, the inner end surfaces at two sides of the housing are provided with a sub-seat sliding groove 20 for sliding a sub-seat 32 from bottom to top along the length direction, and a substrate fixing groove 21 for fixing the substrate 1, the sliding seat 3 comprises a seat body 30, a push handle 31 arranged above the seat body 30 and the sub-seat 32 fixed in the seat body, the sub-seat 32 is provided with a brush 33 corresponding to the circuit configuration surface 10, the seat body 30 is movably arranged at the outer side of the housing 2 along the length direction, the sub-seat 32 in the seat body is movably arranged at the sub-seat sliding groove 20 in the housing along the length direction, the brush 33 is electrically contacted with the resistance circuit configuration, the two stoppers 4 are fixed to the left and right sides of the closed housing 2, respectively.

The sub-base 32 has a receiving groove 34 on both sides of the sub-base slide groove 20 with respect to the housing, a ball 35 is provided in the receiving groove 34, a ball slide groove 22 is provided in the sub-base slide groove 20 with respect to the moving direction of the ball 35, and the ball 35 contacts the housing 2.

The stopper 4 on one side is further provided with a fixing groove 40 for fixing the motor 5, a belt pulley 51 is arranged on the motor shaft 50, a pulley 52 is arranged on the stopper 4 on the other side, a belt 53 is further included and is sleeved between the pulley 52 and the belt pulley 51, and a gear buckle 54 is arranged at the upper end of the seat body 30 and is used for fixing the belt 53 on the seat body 30.

The gear buckle 54 has a first protrusion 55, a second protrusion 55A and an adjusting hole 56, and the belt 53 is wound around the first protrusion 55 and the second protrusion 55A for rotating the adjusting hole 56 to drive the belt 53 to rotate so as to adjust the tightness of the belt 53.

The brush 33 includes a main body 330 made of a conductive metal sheet, a contact member 331 having a certain number of wire-cylindrical shapes is fixed on the main body 330, the tail end of the contact member 331 has an arc portion 332, and the tail end 333 of the main body has a predetermined bending angle.

The circuit arrangement surface 10 of the substrate has a resistance circuit 11, and the surface thereof has an anisotropic conductive material layer 13.

The beneficial effects of the utility model reside in that:

the sliding potentiometer of the utility model has the effects of preventing dust, reducing sliding resistance, improving sliding hand feeling and prolonging the service life of products.

Drawings

Fig. 1 is an exploded perspective view of a prior art potentiometer;

FIG. 2 is a sectional elevation view of a prior art potentiometer set;

fig. 3 is a perspective view of an embodiment of the sliding potentiometer according to the present invention;

fig. 4 is an exploded perspective view of the sliding potentiometer according to the present invention;

fig. 5 is a sectional perspective view of an assembled part of an embodiment of the sliding potentiometer according to the present invention;

FIG. 6 is an assembled cross-sectional view of an embodiment of the sliding potentiometer of the present invention;

FIG. 7 is an enlarged view of a belt and gear buckle assembly according to an embodiment of the sliding potentiometer of the present invention;

fig. 8 is a schematic view illustrating adjustment of a belt and gear buckle assembly according to an embodiment of the sliding potentiometer of the present invention;

fig. 9 is a perspective view of an embodiment brush of the sliding potentiometer according to the present invention;

fig. 10 is a side view of an embodiment brush of a sliding potentiometer according to the present invention;

fig. 11 is a plan view of a circuit layout of a substrate according to an embodiment of the sliding potentiometer of the present invention;

fig. 12 is a cross-sectional view a-a of fig. 11.

Reference numerals:

sliding seat for B exercise and C exercise

D conventional circuit configuration surface E conventional resistance circuit

F sliding space G sliding groove

Seat body I for H exercises

J conventional brush K conventional terminal

1 substrate 10 Circuit arrangement surface

11 resistance circuit 12 terminal base

13 anisotropic conductive material layer 2 shell

20 sub-base chute 21 base plate fixing groove

22 ball chute 3 slide

30 seat body 31 push handle

32 son base 33 brush

330 main body 331 contact

332 arc part 333 tail end of main body

34 ball of containing groove 35

4 stop 40 fixing groove

5 Motor 50 Motor shaft

51 Pulley 52

53 belt 54 gear buckle

55 first projection 55A second projection

56 adjustment hole 56A adjustment hole second position

Detailed Description

The utility model relates to a slidingtype potentiometre. Referring to the perspective view of the embodiment of the present invention in fig. 3, the exploded perspective view of the embodiment of the present invention in fig. 4, the exploded perspective view of the embodiment of the present invention in fig. 5, and the exploded perspective view of the embodiment of the present invention in fig. 6, it can be seen that the sliding potentiometer of the present invention comprises a base plate 1, a housing 2, a sliding base 3, and two stoppers 4, wherein the lower end surface of the base plate 1 extends along the length direction to form a circuit configuration surface 10, the circuit configuration surface 10 has a resistance circuit 11, see fig. 11 and 12, the resistance circuit 11 connects with a terminal base 12, the housing 2 is "u" shaped, the inner end surfaces at both sides of the housing have a sub-base chute 20 for sliding the sub-base 32 from bottom to top along the length direction, and a substrate fixing groove 21 for fixing the base plate 1, the base body 3 comprises a base body 30, a push handle 31 disposed above the sliding base 30, and a sub-base 32 fixed inside the base body 30, the sub-base 32 is provided with a brush 33 corresponding to the circuit arrangement surface 10, the base 30 is movably arranged on the outer side of the housing 2 along the length direction, the sub-base 32 in the base 30 is movably arranged on the sub-base sliding groove 20 in the housing 2 along the length direction, the brush 33 is electrically contacted with the resistance circuit 11 on the circuit arrangement surface 10 of the substrate, the two stoppers 4 are respectively fixed on the left side and the right side of the closed housing 2, since the resistance circuit 11 of the substrate 1 is arranged on the lower end surface of the inside of the n-shaped housing 2, the electric brush 33 of the sliding seat 3 is arranged inside the n-shaped housing 2, the seat 30 and the push handle 31 are slidably moved outside the housing 2, and the left and right sides of the shell 2 are fixedly sealed by the stoppers 4, so that foreign matters such as external dust, beach or wind sand and rainwater generated outdoors are not easy to enter the shell 2, and the shell has the effect of preventing the sand dust and the foreign matters from entering the shell 2 to cause damage.

The utility model discloses aforementioned sub-seat 32, its sub-seat spout 20 both sides for the shell are equipped with storage tank 34, are equipped with ball 35 in the storage tank 34, and sub-seat spout 20 of shell is equipped with ball spout 22 for the moving direction of ball 35 to ball 35 is as contacting with shell 2, makes slide 3 reduce sliding resistance when removing, improves to slide and feels, and can prolong product life.

The utility model discloses aforementioned one side dog 4 is equipped with fixed slot 40 to fixed motor 5 is equipped with belt pulley 51 on the motor shaft 50, and opposite side dog 4 is equipped with pulley 52, has a belt 53 cover in addition and establishes between around pulley 52 and belt pulley 51, and aforementioned pedestal 30 upper end is equipped with gear buckle 54 to on being fixed in pedestal 30 with belt 53, borrow and drive slide 3 by motor 5 driving belt 53, reach with programme-controlled slidingtype potentiometre.

Referring to fig. 7, an enlarged view of a belt and gear buckle assembly according to an embodiment of the present invention, the gear buckle 54 of the present invention has a first protrusion 55, a second protrusion 55A and an adjustment hole 56, the belt 53 is wound around the first protrusion 55 and the second protrusion 55A, and referring to fig. 8, the belt and gear buckle assembly according to an embodiment of the present invention is adjusted by rotating the adjustment hole 56 to rotate the belt 53 (if the adjustment hole 56 rotates clockwise to the second position 56A, the belt 53 rotates inward and is adjusted tightly, otherwise, the belt 53 is adjusted loose), and further the tightness of the belt 53 is adjusted.

Please refer to fig. 9 and 10. The brush 33 of the present invention includes a main body 330 formed of a conductive metal sheet, a contact 331 having a certain number of wire cylinders is fixed (e.g., welded) to the main body 330, the tail end of the contact 331 has an arc portion 332, and the tail end 333 of the main body has a predetermined bending angle (so that the arc portion 332 of the brush contact 331 and the resistance circuit 11 are in continuous electrical contact with each other with elasticity). Because the utility model discloses brush 33's contact 331 is the silk cylindric, and this contact 331 tail end utensil circular arc portion 332, can not have the sharp deckle edge that current brush caused because of the punching press, has the efficiency that can not scratch the carbon film on the resistance circuit 11 and prolong product life. Further, since the contact 331 of the brush 33 has an extremely fine cylindrical shape, it is possible to apply the brush to the fine resistor circuit 11 and perform more precise output.

Referring to fig. 11, a plan view of a circuit configuration surface of a substrate according to an embodiment of the present invention and fig. 11A-a cross-sectional view of fig. 12, the resistance circuit 11 of the circuit configuration surface 10 of the substrate of the present invention has a layer of anisotropic conductive material 13 on the surface thereof. Except that the carbon film on the resistance circuit 11 will not be scraped and lost due to long-term friction contact with the brush 33, the anisotropic conductive material uses conductive particles to connect the bottom resistance circuit and the upper brush to conduct, and simultaneously, the conduction short circuit between two adjacent resistance circuits 11 can be avoided, so that the waterproof, conductive and insulating functions are better.

Thus, the design purpose of the utility model is achieved.

However, the above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all structural changes equivalent to those made by the present specification and claims should be considered as included in the scope of the present invention.

Claims (6)

1. A sliding potentiometer is characterized in that: comprises a substrate (1), a shell (2), a sliding seat (3) and two stop blocks (4), wherein the lower end surface of the substrate (1) is provided with a circuit configuration surface (10) along the length direction in an extending way, the circuit configuration surface (10) is provided with a resistance circuit (11), the resistance circuit (11) is connected with a terminal base (12), the shell (2) is in a reverse U shape, the inner end surfaces at the two sides of the shell are provided with a sub-base sliding groove (20) for sliding a sub-base (32) from bottom to top along the length direction, and a substrate fixing groove (21) for fixing the substrate (1), the sliding seat (3) comprises a seat body (30), a push handle (31) arranged above the seat body (30) and a sub-base (32) fixed inside the seat body, the sub-base (32) is provided with an electric brush (33) relative to the circuit configuration surface (10), the seat body (30) is movably arranged at the outer side of the shell (2) along the length direction, the sub-base (32) inside the seat body is movably, the electric brush (33) is electrically contacted with the resistance circuit (11) on the circuit configuration surface (10) of the substrate, and the two stoppers (4) are respectively fixed on the left side and the right side of the closed shell (2).

2. The sliding potentiometer according to claim 1, wherein: the sub-base (32) is provided with accommodating grooves (34) on two sides of the sub-base sliding groove (20) relative to the shell, balls (35) are arranged in the accommodating grooves (34), the sub-base sliding groove (20) of the shell is provided with a ball sliding groove (22) relative to the moving direction of the balls (35), and the balls (35) are in contact with the shell (2).

3. The sliding potentiometer according to claim 1, wherein: the stop block (4) on one side is additionally provided with a fixing groove (40) for fixing the motor (5), a belt pulley (51) is arranged on a motor rotating shaft (50), a pulley (52) is arranged on the stop block (4) on the other side, a belt (53) is sleeved between the winding pulley (52) and the belt pulley (51), and a gear buckle (54) is arranged at the upper end of the seat body (30) and used for fixing the belt (53) on the seat body (30).

4. The sliding potentiometer according to claim 3, wherein: the gear buckle (54) is provided with a first convex column (55), a second convex column (55A) and an adjusting hole (56), and the belt (53) is wound on the first convex column (55) and the second convex column (55A) and used for rotating the adjusting hole (56) to drive the belt (53) to rotate so as to adjust the tightness of the belt (53).

5. The sliding potentiometer according to claim 1, wherein: the electric brush (33) comprises a main body (330) formed by a conductive metal sheet, a certain number of contact pieces (331) in a wire-column shape are fixed on the main body (330), the tail end of each contact piece (331) is provided with an arc part (332), and the tail end (333) of the main body is provided with a preset bending angle.

6. The sliding potentiometer according to claim 1, wherein: the circuit arrangement surface (10) of the substrate has a resistance circuit (11) having an anisotropic conductive material layer (13) on the surface thereof.

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