CN201438399U

CN201438399U - Angle limitation free variable resistor with regularly varying resistance

Info

Publication number: CN201438399U
Application number: CN2009201562693U
Authority: CN
Inventors: 范扬康; 范扬鸿
Original assignee: MENTAI INDUSTRY Co Ltd
Current assignee: MENTAI INDUSTRY Co Ltd
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2010-04-14
Anticipated expiration: 2019-06-18

Abstract

The utility model discloses an angle limitation free variable resistor with a regularly varying resistance, which comprises a baseplate, an insulation layer, a resistor body, a rotating component, and a contact piece rotating under the driven of a rotating component, wherein the baseplate is equipped with a first electrode, a second electrode and a third electrode; the first electrode is provided with a ring-shaped part; the third electrode is provided with a semi-ring shaped part extending along the ring-shaped part; the insulation layer surrounds the ring-shaped part and covers the second electrode and the semi-ring shaped part; the resistor body is arranged on the insulation layer and in contact with the second electrode and the semi-ring shaped part through the insulation layer; the brush foot of the contact piece is in contact with the resistor body and the ring-shaped part respectively; the insulation layer enables the rotating component to drive, without angle limitation, the contact piece to slide on the resistor body without being in contact with the second and the third electrodes, and damage on the rotating component caused by improper rotating force can be avoided.

Description

The variable resistance that no corner restriction and resistance tool rule change

Technical field

The utility model relates to a kind of variable resistance, particularly relates to a kind of revolving variable resistance, the anglec of rotation and change resistance value arbitrarily, and in continuing rotary course, its resistance value presents the variation of rule.

Background technology

Variable resistance is a kind ofly to have three links usually and can manually change the passive device of its resistance value, is widely used in the adjustment analog signal, brilliance control of for example wireless volume control, light fixture or the like.

Please refer to shown in Figure 8, be a kind of existing rotary variable resistor, comprise a housing 60, a substrate 61, a carbon film layer 62, a fixed mount 63, a rotating shaft 64, a rotating part 65 and a contact chip 66, wherein, these housing 60 bottoms have inwardly protruded out a stop section 600.

This substrate 61 is located on this housing 60 and is had perforation 610 and many flat coppers tinsel cord road 611, this copper foil circuit 611 comprises one first Copper Foil 611a, one second Copper Foil 611b and one the 3rd Copper Foil 611c, this first Copper Foil 611a has a ring part around perforation 610, and this second and third Copper Foil 611b, 611c are divided into this first Copper Foil 611a both sides at interval.

This carbon film layer 62 is formed on this substrate 61, and it is surrounded on ring part peripheral of this first Copper Foil 611 and keeps a suitable spacing, and two ends connect second and third Copper Foil 611b, 611c respectively.The maximum resistance of this variable resistance can measure between second and third Copper Foil 611b, 611c.

This fixed mount 63 is located on substrate 61 back sides and with these housing 60 windings and have an axle sleeve 630 that extends into perforation 610.

This rotating shaft 64 is arranged on the axle sleeve 630 of this fixed mount 63.

This rotating part 65 and rotating shaft 64 terminal windings can rotate with the rotation of rotating shaft 64, and these rotating part 65 1 side vertical extent have a projection 650, and these projection 650 correspondences are near the stop section 600 of housing 60 and the anglec of rotation of restriction rotating part 65.

This contact chip 66 can conduct electricity, and it is located on this rotating part 65 and can rotates with rotating part 65, and this contact chip 66 has a plurality of first brush pin 660 and the second brush pin 661 contacts with the ring part of the carbon film layer 62 and the first Copper Foil 611a respectively.

When contact chip 66 rotated with rotating part 65, these the first brush pin 660 and the second brush pin 661 promptly slided on the ring part of the carbon film layer 62 and the first Copper Foil 611a respectively, change the resistance value between the first Copper Foil 611a and other Copper Foils (611b or 611c) thus.The rotational angle of the projection 650 of rotating part 65 with restriction contact chip 66 can be blocked in the stop section 600 of this housing 60, contacts with copper foil circuit 611 with the first brush pin 660 of avoiding contact chip 66 and causes short circuit.

Yet,, force rotation and will cause the joint construction between rotating shaft 64 and the rotating part 65 to damage easily if countershaft 64 application of forces are improper because that contact chip 66 can not rotate is arbitrarily angled.

The utility model content

As shown in the above description, because that the contact chip of existing rotary variable resistor can not rotate is arbitrarily angled, forces rotation and will cause joint construction damage between rotating shaft and the rotating part easily.

In view of this, main purpose of the present utility model provides a kind of variable resistance that does not have corner restriction and the variation of resistance tool rule, and it mainly comprises:

One housing, its hollow and have an openend;

One substrate, it is located at the openend of housing and has a perforation and many conducting wires, described conducting wire is formed on the substrate and comprises one first electrode slice, second electrode and third electrode, this first electrode has a ring part and a link, this ring part is around this perforation, this link then extends to substrate one side from ring part, this second electrode and first electrode gap open and have that a link extends to substrate one side and with the link of first electrode side by side, this third electrode and second electrode and first electrode gap are opened and are had a semi-annular half and a link, extend along the ring part of first electrode this semi-annular half compartment of terrain, the link of this third electrode from the front end of semi-annular half extend to substrate one side and with the link of first and second electrode side by side;

One insulating barrier, in the form of a ring, its spacer ring is around the ring part of first electrode and cover the semi-annular half of second electrode and third electrode, and the end of the semi-annular half of corresponding second electrode and third electrode forms the slit respectively;

One resistive element, in the form of a ring and correspondence is formed on the insulating barrier, this resistive element also contacts with second and third electrode via the slit of insulating barrier; And

One rotary components is located on the substrate with the openend winding of this housing;

One contact chip is connected with rotary components and can rotates with rotary components, and this contact chip has a plurality of first brush pin and the second brush pin, and the described first brush pin contacts with resistive element, and described second brushes pin contacts with the ring part of first electrode.

Cover second electrode and third electrode by the conducting wire design fits insulating barrier on the substrate, make contact chip can slide on arbitrarily on the resistive element and electrically do not contact with second and third electrode.Therefore rotating shaft can not have corner and restrictedly rotates a circle, and it is improper and cause the damage of rotary components therefore can to avoid rotating the application of force.

Description of drawings

Fig. 1 is the combination stereogram of the utility model one preferred embodiment.

Fig. 2 is the three-dimensional exploded view of Fig. 1.

Fig. 3 is the substrate vertical view of Fig. 2.

Fig. 4 is the cutaway view of Fig. 1.

Fig. 5 is the partial enlarged drawing that the first brush pin of the contact chip of Fig. 4 contacts with resistive element.

Fig. 6 is the partial enlarged drawing that the second brush pin of the contact chip of Fig. 4 contacts with first electrode.

Fig. 7 is the correlogram that the resistance of the present utility model and the anglec of rotation change.

Fig. 8 is an existing rotary variable resistor.

The main element symbol description:

(10) housing (20) substrate

(21) perforation (22) conducting wire

(22a) first electrode (22b), second electrode

(22c) third electrode (23) insulating barrier

(230) slit (24) resistive element

(30) rotary components (31) fixed mount

(32) rotating shaft (33) rotating part

(310) axle sleeve (320) end

(330) installation hole (40) contact chip

(41) first brush pin (42) second brush pin

(50) pin assembly (51) pin

(60) housing (61) substrate

(62) carbon film layer (63) fixed mount

(64) rotating shaft (65) rotating part

(66) contact chip (600) stop section

(610) perforation (611) copper foil circuit

(611a) first Copper Foil (611b), second Copper Foil

(611c) the 3rd Copper Foil (630) axle sleeve

(650) projection (660) first brush pin

(661) second brush pin

Embodiment

Please refer to Fig. 1, Fig. 2 and shown in Figure 4, be preferred embodiment of the present utility model, it comprises:

One housing 10, for hollow has an openend, in the present embodiment, the openend periphery of this housing 10 is formed with a plurality of strangulation lappets;

One substrate 20 is located at the openend of housing 10 and is had a perforation 21 and many conducting wires 22, and substrate 20 1 sides and further penetrate and be formed with a plurality of welding holes.

These conducting wires 22 are formed on the substrate 20 and comprise one first electrode 22a, the second electrode 22b and third electrode 22c, this first electrode 22a has a ring part and a link, this ring part is around this perforation 21, this link then extends to the welding hole of substrate 20 1 sides from ring part, this the second electrode 22b and the first electrode 22a are spaced apart, and have a link extend to substrate 20 1 sides welding hole and with the link of the first electrode 22a side by side, this third electrode 22c and the second electrode 22b and the first electrode 22a are spaced apart and have a semi-annular half and a link, to be the compartment of terrain extend along the ring part of the first electrode 22a this semi-annular half, the link of this third electrode 22c from the front end of semi-annular half extend to substrate 20 1 sides welding hole and with first and second electrode 22a, the link of 22b side by side; In the present embodiment, electrode 22a, the 22b of this conducting

wire

22,22c can be Copper Foil.

One insulating barrier 23, in the form of a ring, further with reference to shown in Figure 3, its spacer ring covers the semi-annular half of the second electrode 22b and third electrode 22c around the ring part of the first electrode 22a, and the end of the semi-annular half of corresponding second electrode 22b and third electrode 22c forms slit 230 respectively;

One resistive element 24 is in the form of a ring and correspondence is formed on the insulating barrier 23 that this resistive element 24 also contacts with second and

third electrode

22b, 22c via the slit 230 of insulating barrier 23; In the present embodiment, this resistive element 24 is a carbon film;

One rotary components 30, be located on the substrate 20 with the openend winding of this housing 10, in the present embodiment, this rotary components 30 comprises a fixed mount 31, a rotating shaft 32 and a rotating part 33, wherein, this fixed mount 31 is located on the surface that substrate 20 is not provided with conducting wire 22 and with these housing 10 windings and fixed by the strangulation lappet of housing 10, and these fixed mount 31 counterpart substrates 20 perforation 21 positions are formed with an axle sleeve 310 that extends into perforation 21; This rotating shaft 32 is arranged on this axle sleeve 310 and has an end 320 extends this axle sleeve 310; Towards the conducting wire 22 of substrate 20, in the present embodiment, this rotating part 33 has an installation hole 330 can be for end 320 windings of rotating shaft 32 with end 320 windings of rotating shaft 32 for this rotating part 33, and this rotating part 33 can rotate with the rotation of rotating shaft 32;

One contact chip 40, be connected with rotary components 30 and can rotate with rotary components 30, in the present embodiment, this contact chip 40 is located on the rotating part 33 of rotary components 30, and have a plurality of first the brush pin 41 and second the brush pin 42, further collocation Fig. 5 and shown in Figure 6, the described first brush pin 41 contacts with resistive element 24, and the described second brush pin 42 contacts with the ring part of the first electrode 22a;

In the present embodiment, the utility model further comprises a pin assembly 50, and this pin assembly 50 has a pedestal and a plurality of pin 51; Described pin 51 is arranged on this pedestal, and extends into the welding hole of substrate 20 respectively and fixing with the welding of each link.

When rotating shaft 32 rotations, promptly can drive rotating part 33 rotates, the contact chip of being located on the rotating part 33 40 also can and then rotate, on this contact chip 40 the first brush pin 41 and the second brush pin 42 promptly slide on the ring part of the resistive element 23 and the first electrode 22a respectively, and change the resistance value between the first electrode 22a and other electrodes (22b or 22c).Please refer to shown in Figure 7, when the utility model from resistance value hour, beginning rotating shaft 32, the resistance change of variable resistance is to be parabolical variation, repeats this parabola more regularly and change after revolving three-sixth turn.

Because insulating barrier 23 covers the second electrode 22b and third electrode 22c, make contact chip 40 can slide on arbitrarily on the resistive element 24 and electrically do not contact with second and third electrode 22b, 22c.Therefore rotating shaft 32 can not have corner and restrictedly rotates a circle, and it is improper and cause the damage of rotary components 30 therefore can to avoid rotating the application of force.

Claims

1. a variable resistance that does not have corner restriction and the variation of resistance tool rule is characterized in that, comprises:

One housing, its hollow and have an openend;

One substrate, it is located at the openend of housing and has a perforation and many conducting wires, and described conducting wire is formed on the substrate and comprises:

One first electrode has a ring part and a link, and this ring part is around this perforation, and this link then extends to substrate one side from ring part;

One second electrode, open with first electrode gap and have that a link extends to substrate one side and with the link of first electrode side by side; And

One third electrode, open with second electrode and first electrode gap and have a semi-annular half and a link, this semi-annular half is extended and at a distance of certain intervals along the first electrode side, the link of this third electrode from the front end of semi-annular half extend to substrate one side and with the link of first and second electrode side by side;

One insulating barrier, in the form of a ring, it be covered in the semi-annular half of second electrode and third electrode, and the end of the semi-annular half of corresponding second electrode and third electrode forms the slit respectively around the ring part of first electrode and at a distance of certain intervals;

One resistive element, in the form of a ring and correspondence is formed on the insulating barrier, this resistive element contacts with second and third electrode via two slits of insulating barrier;

One rotary components is located on the substrate with the openend winding of this housing; And

2. variable resistance according to claim 1 is characterized in that, this rotary components comprises:

One fixed mount, be located on the surface that substrate is not provided with the conducting wire and with this housing winding, this fixed mount counterpart substrate punch position is formed with an axle sleeve that extends into perforation;

One rotating shaft is arranged on the axle sleeve of this fixed mount and has an end and extends this axle sleeve; And

One rotating part, can rotate with the rotation of rotating shaft towards the conducting wire of this substrate with the terminal winding of this rotating shaft;

Aforementioned contact chip is located on the rotating part of this rotary components.

3. variable resistance according to claim 2 is characterized in that:

This substrate further penetrates and is formed with a plurality of welding holes, and described welding hole penetrates this substrate and the corresponding link that connects each electrode;

This variable resistance further comprises a pin assembly, and this pin assembly is located on the substrate and is comprised a pedestal and a plurality of pin, and described pin is arranged on this pedestal, and extend into each welding hole respectively and with the welding of the link of each electrode.

4. variable resistance according to claim 2 is characterized in that:

This housing further is formed with a plurality of strangulation lappets at the openend periphery;

This fixed mount is fixed by the strangulation lappet of housing.

5. according to arbitrary described variable resistance in the claim 1 to 4, it is characterized in that: this first electrode, second electrode and third electrode are Copper Foil.

6. according to arbitrary described variable resistance in the claim 1 to 4, it is characterized in that: this resistive element is a carbon film.