JPH04109503U - semi-fixed variable resistor - Google Patents

Abstract

(57) [Summary] [Structure] The slider 3 of the semi-fixed variable resistor 1 connects three discs 31, 32, 33 from one elastic metal plate to a connecting part 35,
36 is connected and punched out, and the disc 3 is placed on top of the disc 32.
3 is manufactured by folding the disk 31 under the disk 32 and stacking them three times. At this time, a mortar-shaped support 34 and notches 38 and 39 for inserting a rotating jig are formed in the disk 32, and the center of the disk 31 is punched out to form a ring shape, and the other end is punched out to form a ring shape. The disc 33 is flat and has a notch 41 in its center for inserting a rotating jig. [Effects] Only the notch 41 is provided in the disk 33 on the upper surface of the slider 3, and the other portions can be configured as a flat surface, so that suction on the surface is ensured. Also, the notch 3 of the slider 3
Since 8, 39, and 41 are provided on both of the two discs 32 and 33, the strength of the slider 3 can be improved when a rotating jig is inserted and rotated.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to semi-fixed variable resistors, and in particular to chip-type semi-fixed variable resistors. It is something.

0002

[Prior art]

FIG. 3 is a diagram showing this type of conventional semi-fixed variable resistor 80, and FIG. The top view of the same figure (b) is a sectional view taken along the line C--C of the same figure (a).

0003 As shown in the figure, this semi-fixed variable resistor 80 consists of an insulating substrate 81 and an elastic gold plate. A slider 83 made of a metal plate and rotatably placed on the substrate 81; and a current collector plate 85 disposed on the back side of the substrate 81. The cylindrical eyelet 87 provided on the plate 85 is connected to the through hole 89 provided on the substrate 81 for sliding contact. It is inserted into a fitting hole 91 provided in the child 83, and its tip is caulked.

0004 In this state, insert a screwdriver into the notch 84 provided in the slider 83. When the slider 83 is rotated by A contact portion 93 provided on the arm portion 92 connects to a resistor pattern provided on the substrate 81 (not shown). ) and change its resistance value.

[0005] By the way, this kind of small chip type semi-fixed variable resistor 80 is installed in a desired electronic component. When mounting, a suction part (not shown) of a suction device is placed on the semi-fixed variable resistor 80. The top surface of the slider 83 is attracted to the suction part by vacuum suction, and the slider 83 is conveyed. This is done by

[0006]

[Problem that the idea aims to solve]

However, the conventional semi-fixed variable resistor 80 described above has the following problems. There was a point.

[0007] The center part of the slider 83 of the semi-fixed variable resistor 80 is recessed in the shape of a mortar. Therefore, the upper surface of the slider 83 has few flat surfaces, and the upper surface of the slider 83 is connected to the suction device. Even if vacuum suction is performed using the suction unit, there is a lot of air leakage, resulting in poor suction.

[0008] The notch 84 of the slider 83 is only provided in one metal plate; The depth of the notch 84 for inserting a screwdriver cannot be made very deep. this Therefore, the strength of the slider 83 against the rotational drive of the driver cannot be made very strong.

[0009] This invention was made in view of the above points, and there are many flat surfaces on the top surface of the slider. In addition, we provide a semi-fixed variable resistor whose slider has strong strength against driver rotation. It's about doing.

0010

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention combines one elastic metal plate into three discs 31, 3. 2 and 33 are punched so that they are joined together with a part of their outer circumferences in common, and the central disk 32 is The center part thereof is formed into a mortar-shaped support stand 34, and the bottom of the support stand 34 is provided with an insertion hole 3. Notches 38, 3 for rotational operation are formed so as to straddle the support base 34. 9, and the disk 31 at one end is punched out in the center and formed into a ring shape. A sliding contact 40 is formed at a predetermined portion of the ring, and the disk 33 at the other end is flat. A notch 41 for rotational operation is formed in the central part of the lever, and the disc 31 at one end is connected to the central part. Place it so that the disk 33 at the other end, which is below the disk 32, is above the center disk 32. A slider 3 is folded three times at each joint, and a resistor pattern is placed on the surface of the slider 3. A substrate 5 having a through hole 55 formed therein and a through hole 55 formed in a predetermined portion thereof, and and a metal current collecting plate 7 having a cylindrical protrusion 71, and the through hole 55 of the substrate 5 Insert the tip of the cylindrical protrusion 71 of the current collector plate 7 inserted into the insertion hole 37 of the slider 3. A semi-fixed variable resistor 1 was constructed by caulking its tip.

[0011]

[Effect] With the above configuration, the disc 33 located on the top surface of the slider 3 has a notch 41. The rest of the surface is flat. For this reason, adsorb the surface When transporting this semi-fixed variable resistor 1, the suction can be performed reliably.

0012 Moreover, the notches 38, 39, 41 of the slider 3 are formed on the two overlapping discs 31, 3. 2, so you can insert a jig for rotation operation such as a flathead screwdriver. The strength of the slider when rotating can be improved.

[0013]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

[0014] FIG. 1 is a diagram showing a semi-fixed variable resistor 1 according to this embodiment, and FIG. The same figure (b) is a cross-sectional view taken along the line A-A of the same figure (a), and the same figure (c) is a back view. be.

[0015] As shown in the figure, this semi-fixed variable resistor 1 consists of a slider 3, a substrate 5, and a current collector plate 7. The cylindrical protrusion 71 of the current collector plate 7 is inserted into the through hole 55 of the substrate 5 and its tip is slid. Insert it into the insertion hole 37 (see Fig. 2) provided at the bottom of the support base 34 of the mover 3, and The slider 3 is rotatably supported on the substrate 5 by caulking.

[0016] Each component will be explained in detail below.

[0017] FIG. 2 shows the slider 3, in which (a) is a plan view, (b) is a side view, Figure (c) is a cross-sectional view taken along line B-B in Figure (a), and Figure (d) is an expanded view of the slider 3. FIG. As shown in the figure, this slider 3 is made of an elastic metal plate. It is constructed by folding three disks 31, 32, 33 into three layers. Here this print To manufacture the mover 3, first, as shown in Figure (d), a single elastic metal plate is made into a plastic. Three disks 31, 32, and 33 are punched out using a stress process. At this time, each disk 31, 32 , 33 are integrally connected by connecting portions 35, 36. Also, the central disk 3 A support stand 34 protruding from one side in the shape of a mortar is provided in the center of 2. A fitting hole 37 is provided at the bottom of the fitting hole 37, and a cylinder of the current collector plate 7, which will be described later, is inserted into the fitting hole 37. The slider 3 is rotatably supported by the protrusion 71 inserted therethrough, and the side of the support base 34 is Insert a flathead screwdriver for rotation operation into the surface so as to straddle the support base 34. Cutouts 38 and 39 are provided. Also, the center part of the disk 31 on one end side is punched out. It is formed into a ring shape, and a sliding contact 40 is formed at a predetermined portion thereof. Also, insert a flathead screwdriver for rotation operation into the center of the disk 33 on the other end side. A notch 41 is provided.

[0018] This slider 3 connects the disk 31 on the one end side shown in FIG. Bend it downwards (in the figure (d), the back side of the paper), and then fold the disk 3 on the other end side. 3 upward at the connecting part 36 (towards the surface of the paper in the figure (d)). It is made by At this time, the center part of the ring of the disc 31 is the support of the disc 32. It passes through the holder 34, and the disc 33 covers the top surface of the disc 32. The positions of the notches 38 and 39 provided in the disk 32 and the notch 41 provided in the disk 33 are as follows. Match.

[0019] Next, the substrate 5 is made of an insulating plate formed into a substantially rectangular shape, as shown in FIG. , a resistor pattern (not shown) approximately in the shape of a horseshoe is formed on its upper surface; Terminal parts 51 and 53 made of conductive patterns are formed at both ends of the board. Also the same As shown in Figure (b), the cylindrical protrusion 71 of the current collector plate 7 is inserted into the center of the substrate 5. A through hole 55 is provided for this purpose. In addition, a current collector plate 7 is inserted and fixed on the bottom surface of the substrate 5. A recessed portion 57 is provided for determining the position.

[0020] Next, as shown in FIG. 1, the current collector plate 7 is provided with cylindrical protrusions 71 at predetermined portions of the metal plate. It is composed of

[0021] A notch 41 provided in the disc 33 of the slider 3 of this semi-fixed variable resistor 1, In the notches 38 and 39 provided in the disc 32, insert a flathead dryer, which is a jig for adjusting the resistance value. When a bar (not shown) is inserted and rotated, the slider 3 rotates, thereby causing the sliding The sliding contact 40 of the child 3 slides on the resistor pattern on the board 5, and the terminal parts 51, 53 The resistance value between the current collector plate 7 and the current collector plate 7 is changed.

[0022] If you configure the semi-fixed variable resistor 1 as described above, the flathead screwdriver can be used as a slider. The notch 41 provided in the disc 33 of No. 3 and the notches 38 and 39 provided in the disc 32 are double They will be engaged. For this reason, notches 38 and 39 that engage with a flathead screwdriver , 41 becomes thicker, which makes it more difficult to rotate the flathead screwdriver. The strength of the slider 3 increases.

[0023] Also, when transporting this semi-fixed variable resistor 1, the top surface of the disc 33 of the slider 3 is attracted. The disc 33 is sucked by the suction part of the device, and the area of the flat surface of the disc 33 is Since the is large, suction is reliable and poor suction is less likely to occur.

[0024]

[Effect of the idea]

As explained in detail above, according to the semi-fixed variable resistor according to the present invention, the following It has excellent effects such as:

[0025] The area of the flat surface on the top of the slider can be increased, which allows the surface to be attracted and semi-solid. When transporting the constant variable resistor, the suction can be performed reliably and the constant variable resistor can be reliably transported.

[0026] The notch in the slider into which a rotating jig, such as a flat head screwdriver, is inserted must be Since it is provided on both sides of the two discs that are screwed together, it prevents sliding when rotating with a jig. The strength of the child can be improved, and the jig can be easily inserted and rotated.

[Brief explanation of drawings]

[Fig. 1] Semi-fixed variable resistor 1 according to an embodiment of the present invention
FIG. 3A is a plan view, FIG. 1B is a cross-sectional view taken along the line A--A in FIG. 1A, and FIG.

FIG. 2 is a diagram showing the slider 3; FIG. 2(a) is a plan view, FIG. 2(b) is a side view, and FIG. 2(c) is a B of FIG.
-A cross-sectional view taken along the line B, and FIG. 3(d) is a developed plan view of the slider 3.

FIG. 3 is a diagram showing a conventional semi-fixed variable resistor 80;
Figure (a) is a plan view, Figure (b) is C-C in Figure (a).
It is a cross-sectional view taken along the line.

[Explanation of symbols]

1 Semi-fixed variable resistor 3 Slider 31, 32, 33 disk 34 Support stand 35, 36 Connection part 37 Insertion hole 38, 39, 41 Notch 40 Sliding contact 5 Substrate 55 Through hole 7 Current collector plate 71 Cylindrical projection

Claims (1)

[Scope of utility model registration request] Claim 1: One elastic metal plate is punched out so that three discs are joined together with a part of the outer periphery in common, and the central disc has its center part formed into a mortar-shaped support base; An insertion hole is formed at the bottom of the support base, and a notch for rotation operation is formed so as to straddle the support base, and the center of the disc at one end is punched out and formed into a ring shape. A sliding contact is formed at a predetermined portion, a disc at the other end is flat and a notch for rotational operation is formed in its center, and the disc at one end becomes the underside of the central disc. A slider is made by bending the disk three times at the joint so that the disk at the other end is above the center disk, and a resistor pattern is formed on the surface of the slider, and through-holes are formed in predetermined portions of the slider. comprising a substrate and a metal current collector plate having a cylindrical protrusion at a predetermined position, the tip of the cylindrical protrusion of the current collector plate inserted into the through hole of the substrate is inserted into the insertion hole of the slider. A semi-fixed variable resistor characterized by having its tip caulked.