CN209766156U

CN209766156U - Precise metal film leadless resistor

Info

Publication number: CN209766156U
Application number: CN201920644100.6U
Authority: CN
Inventors: 薛慢慢; 邱天娇; 赵君
Original assignee: Shandong Hangtian Zhenghe Electronic Co Ltd
Current assignee: Shandong Hangtian Zhenghe Electronic Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2019-12-10
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses an accurate metallic film leadless resistance, including the resistance shell body, the centre in the resistance shell body is inlayed and is equipped with the resistance core, and the outside of metallic film evenly twines there is the resistance wire, and both ends of resistance wire all weld through solder joint and the middle part of interior iron hat lateral wall, and the one end that interior iron hat is close to the resistance core is fixedly connected with the resistance shell body, and the one end that interior iron hat kept away from the resistance core is fixedly connected with outer iron hat, the utility model discloses an adopt the external winding of built-in resistance core resistance wire, and the end of resistance wire and interior iron hat welding, simple structure, the installation of being convenient for has increased the durability of resistance; the metal film is fixedly arranged outside the resistor core, so that the metal film resistor is high in precision and good in stability, and noise and temperature coefficient are reduced; because the resistance wire is a high-resistance alloy wire and the exterior of the resistance wire is coated with insulating paint, the temperature coefficient is reduced, the stability, the heat resistance and the corrosion resistance are improved, and the precision resistor is convenient to use.

Description

Precise metal film leadless resistor

Technical Field

The utility model relates to a leadless resistor, in particular to accurate metallic film leadless resistor.

Background

The resistor is mainly used for transient voltage protection in the circuit, and the resistor clamps voltage when the circuit is in overvoltage and absorbs redundant current to protect sensitive devices. The protective function of the fuse can be repeatedly used for many times, and the fuse can also be made into a disposable protective device similar to a current fuse.

The metal film precision resistor is made up by adopting high-temp. vacuum coating technique to make nickel-chromium or similar alloy be tightly adhered on the surface of porcelain rod to form a film, cutting and regulating resistance value so as to obtain the final required precision resistance value, then adding proper joint to cut, and coating insulating slurry on its surface, sealing and protecting so as to obtain the invented product. Because it is a lead wire type resistor, it is convenient for manual installation and maintenance, and can be used in most domestic electric appliances, communication and instruments and meters.

The existing resistor usually realizes the resistance work by butting two wiring pins with corresponding circuit interfaces, but the traditional resistor with pins needs electric welding when the pins are connected with a resistor core, so that the structure is complex, the production cost is high, the installation difficulty is higher, the stability and the durability are poor, and the use is inconvenient; the existing lead-free resistor has weak stability and high temperature coefficient, and is not convenient for using a precision resistor; in addition, the existing leadless resistor has unstable resistance wire welding, weak resistance heat resistance and corrosion resistance, and is inconvenient for using precision resistors. Therefore, the conventional leadless resistor has many problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a precise metal film leadless resistor to solve the problems of the traditional resistor with pins in the background technology that the pins and the resistor core need to be electrically welded when being connected, which not only has a complex structure, high production cost, larger installation difficulty, but also has poor stability and durability and inconvenient use; the existing lead-free resistor has weak stability and high temperature coefficient, and is not convenient for using a precision resistor; in addition, the existing leadless resistor has the problems that the resistance wire is not welded stably, the resistance is weak in heat resistance and corrosion resistance, and the use of a precise resistor is inconvenient.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an accurate metallic film leadless resistance, includes the resistance shell body, the inside centre of resistance shell body inlays and is equipped with the resistance core, the fixed surface of resistance core is equipped with the metallic film, the even winding in outside of metallic film has the resistance wire, two ends of resistance wire all weld through the middle part of solder joint and interior iron hat lateral wall, interior iron hat is close to the one end and the resistance shell body fixed connection of resistance core, the outer iron hat of one end fixedly connected with of resistance core is kept away from to interior iron hat.

As an optimal technical scheme of the utility model, the fixed filling layer that is equipped with in clearance department of resistance core and resistance shell body, the filling layer is made by insulating thick liquids material, the resistance shell body is made by insulating nature PVC material, the resistance core is the ceramic core, the resistance wire is high resistant alloy silk, and the resistance wire outside scribbles insulating varnish.

As an optimal technical scheme of the utility model, the height that highly is less than outer iron cap of interior iron cap, form the step form between interior iron cap and the outer iron cap, the solder joint is located the central point of interior iron cap inside wall and puts the department.

As an optimal technical scheme of the utility model, interior iron hat is the loop configuration, the one end that resistance core was kept away from to outer iron hat is oval enclosed construction, outer iron hat and interior iron hat formula structure as an organic whole.

As an optimal technical scheme of the utility model, seted up flutedly between interior iron hat and the outer iron hat, the surface of recess scribbles the lacquer layer, the lacquer layer is made by fire-retardant insulating paint material.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to an accurate metallic film leadless resistance, through adopting built-in resistance core outside to twine the resistance wire, and the end of resistance wire welds with interior iron hat, has got rid of the traditional resistance of taking the pin, simple structure, and is convenient for install, and avoids the pin to expose the problem that easily damages outside, has increased the durability of resistance; the metal film is fixedly arranged outside the resistor core, so that the metal film resistor is high in precision and good in stability, and noise and temperature coefficient are reduced; because the resistance wire is a high-resistance alloy wire and the exterior of the resistance wire is coated with insulating paint, the temperature coefficient is reduced, the stability, the heat resistance and the corrosion resistance are improved, and the precision resistor is convenient to use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the outer iron cap of the present invention;

In the figure: 1. a resistor outer housing; 2. a resistor core; 3. a resistance wire; 4. an inner iron cap; 5. an outer iron cap; 6. welding spots; 7. a metal film; 8. a filling layer; 9. a groove; 10. and (5) a paint layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-2, the utility model provides a precision metal film leadless resistor, including resistance shell body 1, resistance core 2 is inlayed in the middle of resistance shell body 1 inside, and the fixed surface of resistance core 2 is equipped with metallic film 7, and the even winding in outside of metallic film 7 has resistance wire 3, and two ends of resistance wire 3 all weld through the middle part of solder joint 6 with interior iron hat 4 lateral wall, and interior iron hat 4 is close to the one end and the resistance shell body 1 fixed connection of resistance core 2, and interior iron hat 4 keeps away from resistance core 2's one end fixedly connected with outer iron hat 5.

Preferably, fixed filling layer 8 that is equipped with in clearance department of resistance core 2 and resistance shell body 1, filling layer 8 is made by insulating thick liquids material, and resistance shell body 1 is made by insulating nature PVC material, and resistance core 2 is the ceramic core, and resistance wire 3 is high resistant alloy silk, and 3 outsides of resistance wire scribble insulating varnish, is convenient for increase the wearability, guarantees the safe handling of resistance, and resistance core 2 be equipped with, has improved the high temperature resistance of resistance main part.

Preferably, the height of the inner iron cap 4 is smaller than that of the outer iron cap 5, a step shape is formed between the inner iron cap 4 and the outer iron cap 5, and the welding spot 6 is located at the center of the inner side wall of the inner iron cap 4, so that the stability of the electrical connectivity is improved on one hand, and the safety is also improved on the other hand.

Preferably, interior iron cap 4 is the loop configuration, and the one end that resistance core 2 was kept away from to outer iron cap 5 is oval enclosed construction, and outer iron cap 5 and 4 formula structures as an organic whole of interior iron cap reduce the difference in height between interior iron cap 4 and outer iron cap 5 and the resistance shell body 1, guarantee that the japanning back resistance body levels, reach and reduce the throwing material rate.

preferably, set up recess 9 between interior iron hat 4 and the outer iron hat 5, the surface of recess 9 scribbles lacquer layer 10, lacquer layer 10 is made by fire-retardant insulating paint material, being equipped with of recess 9 is favorable to guaranteeing that interior iron hat 4 can not lead to lacquer layer 10 to overflow to solder joint 6 because of tension with 3 handing-over departments of resistance wire, has increased the security, and lacquer layer 10 is made by fire-retardant insulating paint material, the fire-retardant insulation of being convenient for.

When the precision metal film leadless resistor is used, firstly, when the leadless resistor is used, because traditional pins are removed, the leadless resistor is not required to be installed through jacks during installation, and the outer iron cap 5 is of an oval closed structure, the height difference between the inner iron cap 4 and the outer iron cap 5 and the resistor outer shell 1 is reduced, the resistor body is ensured to be flat after painting, and the installation is convenient, because the resistor core 2 is embedded in the middle of the inner part of the resistor outer shell 1, the metal film 7 is fixedly arranged on the outer surface of the resistor core 2, the resistance precision of the metal film 7 is high, the stability is good, the noise and the temperature coefficient are reduced, because the resistance wire 3 is uniformly wound outside the metal film 7, the resistance wire 3 is a high-resistance alloy wire, and the insulation paint is coated outside the resistance wire 3, the stability, the heat resistance and the corrosion resistance are improved, in addition, two ends of the resistance wire 3 are both welded with the middle part of the, increased stability, through recess 9, be convenient for guarantee interior iron hat 4 and 3 handing-over departments of resistance wire can not lead to lacquer layer 10 to overflow to solder joint 6 because of tension, increased the security, because filling layer 8 is made by insulating thick liquids material, avoid the resistor to wet.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

in the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a precision metal film leadless resistor, includes resistance shell body (1), its characterized in that, the inside centre of resistance shell body (1) inlays and is equipped with resistance core (2), the external fixed surface of resistance core (2) is equipped with metal film (7), the even winding in outside of metal film (7) has resistance wire (3), two ends of resistance wire (3) all weld through the inside wall of solder joint (6) with interior iron hat (4), interior iron hat (4) are close to the one end and the resistance shell body (1) fixed connection of resistance core (2), the outer iron hat (5) of one end fixedly connected with of resistance core (2) are kept away from to interior iron hat (4).

2. The precision metal film leadless resistor of claim 1, wherein a filling layer (8) is fixedly arranged in a gap between the resistor core (2) and the resistor outer casing (1), the filling layer (8) is made of an insulating slurry material, the resistor outer casing (1) is made of an insulating PVC material, the resistor core (2) is a ceramic core, the resistance wire (3) is a high-resistance alloy wire, and the outside of the resistance wire (3) is coated with an insulating paint.

3. The precision metal film leadless resistor of claim 1, wherein the height of the inner iron cap (4) is less than the height of the outer iron cap (5), the inner iron cap (4) and the outer iron cap (5) form a step shape, and the welding point (6) is located at the center of the inner side wall of the inner iron cap (4).

4. The precision metal film leadless resistor of claim 1, wherein the inner iron cap (4) is of an annular structure, the end of the outer iron cap (5) away from the resistor core (2) is of an elliptical closed structure, and the outer iron cap (5) and the inner iron cap (4) are of an integral structure.

5. The precision metal film leadless resistor of claim 1, characterized in that a groove (9) is opened between the inner iron cap (4) and the outer iron cap (5), the surface of the groove (9) is coated with a paint layer (10), and the paint layer (10) is made of flame retardant insulating paint material.