CN209183350U - A kind of overcurrent protection ceramic PTC element - Google Patents

Abstract

This reality is novel to disclose a kind of overcurrent protection ceramic PTC element, including ceramic shell, ceramic inner housing and PTC chip, the top of the Ceramic shell internal is fixed with ceramic inner housing, the inside of ceramic inner housing is equipped with PTC chip, elastic u-shaped frame is uniformly fixed on the inner wall at ceramic inner housing both ends, the two sides of the ceramics inner housing all offer logical hole, the U-shaped frame of hard is all fixed on ceramic inner housing two sides outer wall on the outside of logical hole, and metal splint is all fixedly connected with by the first spring being uniformly arranged on the inner sidewall of 2 U-shaped framves of hard, 2 are successively clamped with semiconductor chilling plate and electrode simultaneously between metal splint and PTC chip, the bottom of 2 electrodes is all provided with pin, 2 pins all extend to ceramic shell bottom outside.The utility model can access in the circuit course of work in PTC chip, synchronous to realize cumulative heating effect cooling to PTC chip, to generate in elimination long-time course of normal operation.

Description

A kind of overcurrent protection ceramic PTC element

Technical field

The utility model relates to PTC element technical field, specially a kind of overcurrent protection ceramic PTC element.

Background technique

There is substantial connection between ceramic PTC element internal resistance and temperature, when temperature raising pair, the electricity of ceramic PTC element Resistance value can increase with temperature and be become larger.Using this characteristic, on the telephone line by ceramic PTC element series connection, when flowing through ceramic PTC The electric current of element increases, and the calorific value of ceramic PTC also will increase, and the temperature of element itself can increase, and lead to the resistance value of element Increase, to achieve the purpose that current-limiting protection.

But in actual use, the accumulation generated in PTC element long-time use process by the low current worked normally is hot Amount may cause malfunction since package cooling is bad, impact to the operation of entire route.

Utility model content

The purpose of this utility model is to provide a kind of overcurrent protection ceramic PTC elements, to solve above-mentioned background technique The problem of middle proposition.

To achieve the above object, the utility model provides the following technical solutions: a kind of overcurrent protection ceramic PTC element, It is fixed with ceramic inner housing including ceramic shell, ceramic inner housing and PTC chip, the top of the Ceramic shell internal, ceramics The inside of inner housing is equipped with PTC chip, and the open-topped outside setting of ceramic shell is fluted, and the inside of groove is removable It unloads and top cover is installed, be uniformly fixed with elastic u-shaped frame, while elastic u-shaped frame and PTC on the inner wall at the ceramics inner housing both ends The both ends of chip are fixedly connected, and the two sides of the ceramics inner housing all offer logical hole, lead to the ceramic inner housing two sides on the outside of hole The U-shaped frame of hard is all fixed on outer wall, and all solid by the first spring being uniformly arranged on the inner sidewall of 2 U-shaped framves of hard Surely it is connected with metal splint, while 2 are successively clamped with semiconductor chilling plate and electrode between metal splint and PTC chip, 2 The bottom of electrode is all provided with pin, and 2 pins all extend to ceramic shell bottom outside.

Preferably, it is uniformly fixed with heat conducting bar on the lateral wall of the metal splint, and is uniformly arranged on the U-shaped frame of hard There is aperture, ceramic shell corresponds to and is uniformly provided with through-hole at the position of aperture, while heat conducting bar is passed through far from one end of metal splint Wear aperture and through-hole.

Preferably, the deep equality of the thickness and groove of the top cover, and four angular positions of cap base are all solid Surely there is limited post, while the bottom end of inside grooves is provided with the limit jack being mutually matched with limited post.

Preferably, the top of the limited post is provided with spherical protrusions, and limits two sides inside jack and push up close to internal All be fixed with arc spring lamination at the position at end, at the same arc spring lamination at a distance from limit jack inner tip and spherical protrusions it is straight Diameter is equal.

Preferably, the bottom of the top cover passes through the second spring that is uniformly arranged and is fixedly connected with pressing plate, and pressing plate Bottom end is fixedly connected with the top of PTC chip.

Preferably, the Ceramic shell internal below the ceramic inner housing is equipped with heat-insulation chamber, and the inside of heat-insulation chamber is equal It is even to be provided with glass layer.

Compared with prior art, the utility model has the beneficial effects that the overcurrent protection ceramic PTC element, by It is successively clamped with semiconductor chilling plate and electrode between metal splint and PTC chip, and makes the positive and negative anodes of semiconductor chilling plate It is fixedly connected, can be accessed in the circuit course of work in PTC chip with 2 electrodes, it is synchronous to realize, elimination cooling to PTC chip The cumulative heating effect generated in long-time course of normal operation, at the same by the lateral wall of metal splint uniformly fix along The heat conducting bar that aperture and through-hole extend, so that enclosure interior heat quickly radiates, in addition, metal splint is by being uniformly arranged The first spring be fixed on the inside of the U-shaped frame of hard, under the elastic pressure effect of the first spring so that PTC chip, electrode with And good electrical connection is formed between semiconductor chilling plate, by the open-topped inside grooves setting limit of ceramic shell Jack, and be mutually matched in the limited post of cap base, so that top cover is removably mounted at the top of ceramic shell, cooperation ceramics What is be arranged on the inner wall at inner housing both ends is used to fix the elastic u-shaped frame of PTC chip, facilitates the installation of PTC chip, this is practical new Ceramic shell internal below type ceramics inner housing is equipped with heat-insulation chamber, and the inside of heat-insulation chamber is evenly arranged with glass fibre Layer, glass layer is heat-barrier material, can block hot-fluid transmitting, avoids generating heat due to PTC chip and causes to damage to printed circuit board It is bad.

Detailed description of the invention

Fig. 1 is the schematic diagram of internal structure of the utility model；

Fig. 2 is the inside side structure schematic view of the utility model；

Fig. 3 is enlarged structure schematic diagram at A in Fig. 2 of the utility model；

Fig. 4 is the whole overlooking structure diagram of the utility model.

In figure: 1, heat-insulation chamber；2, the first spring；3, aperture；4, through-hole；5, heat conducting bar；6, the U-shaped frame of hard；7, top cover；8, PTC chip；9, pressing plate；10, second spring；11, ceramic shell；12, Tong Dong；13, semiconductor chilling plate；14, electrode；15, draw Foot；16, glass layer；17, ceramic inner housing；18, elastic u-shaped frame；19, jack is limited；20, limited post；21, groove；22, Metal splint.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Fig. 1-4 is please referred to, the utility model provides a kind of technical solution: a kind of overcurrent protection ceramic PTC element, including Ceramic shell 11, ceramic inner housing 17 and PTC chip 8, the top inside ceramic shell 11 is fixed with ceramic inner housing 17, ceramic The inside of inner housing 17 is equipped with PTC chip 8, and the open-topped outside of ceramic shell 11 setting fluted 21, groove 21 Inside top cover 7 is detachably installed, the deep equality of the thickness and groove 21 of top cover 7, and four angles position of 7 bottom of top cover The place of setting all is fixed with limited post 20, while the bottom end inside groove 21 is provided with the limit jack being mutually matched with limited post 20 19, the top of limited post 20 is provided with spherical protrusions, and limits 19 inside two sides of jack at the position of inner tip all It is fixed with arc spring lamination, while arc spring lamination is equal with the diameter of spherical protrusions at a distance from limit 19 inner tip of jack, top The bottom of lid 7 passes through the second spring 10 being uniformly arranged and is fixedly connected with pressing plate 9, and the bottom end of pressing plate 9 and PTC chip 8 Top is fixedly connected, and is uniformly fixed with elastic u-shaped frame 18 on the inner wall at ceramic 17 both ends of inner housing, at the same elastic u-shaped frame 18 with The both ends of PTC chip 8 are fixedly connected, and the two sides of ceramic inner housing 17 all offer logical hole 12, lead to the ceramic inner casing in 12 outside of hole All it is fixed with the U-shaped frame 6 of hard on 17 two sides outer wall of body, and all by being uniformly arranged on the inner sidewall of the U-shaped frame 6 of 2 hard First spring 2 is fixedly connected with metal splint 22, and heat conducting bar 5, and hard U are uniformly fixed on the lateral wall of metal splint 22 It is evenly arranged with aperture 3 in type frame 6, is uniformly provided with through-hole 4, while heat conducting bar 5 at the position of the corresponding aperture 3 of ceramic shell 11 Aperture 3 and through-hole 4 are run through in one end far from metal splint 22, while successively clamping between 2 metal splints 22 and PTC chip 8 There are semiconductor chilling plate 13 and electrode 14, the model of semiconductor chilling plate 13 can be ES1-12704, and the bottom of 2 electrodes 14 is all It is provided with 15,2 pins 15 of pin and all extends to 11 bottom outside of ceramic shell, the ceramic shell 11 of ceramic 17 lower section of inner housing Inside is equipped with heat-insulation chamber 1, and the inside of heat-insulation chamber 1 is evenly arranged with glass layer 16.

Working principle: in use, PTC chip 8 to be placed in the inside of ceramic inner housing 17, then top cover 7 is fastened on Inside groove 21 on the outside of 11 top end opening of ceramic shell, so that the insertion limit jack 19 of limited post 20 of 7 bottom of top cover is interior Portion, 7 bottom of top cover is connect by the pressing plate 9 that second spring 10 is fixedly connected with PTC chip 8 at this time, cooperates ceramic inner housing 17 The position of the lower fixed PTC chip 8 of elastic u-shaped frame 18 uniformly fixed effect, passes through the pin 15 of electrode 14 on the inner wall at both ends It being connect with printed circuit board, PTC chip 8 is accessed in the circuit course of work using electrode 14, and semiconductor chilling plate 13 is powered on, The synchronous cooling realized to PTC chip 8, eliminates the cumulative heating effect generated in long-time course of normal operation, semiconductor refrigerating The radiating surface of piece 13 is connect with metal splint 22, and what is be arranged on complexed metal clamping plate 22 leads along what aperture 3 and through-hole 4 extended Hot rod 5, so that enclosure interior heat quickly radiates, meanwhile, the heat-protecting glass fibrous layer that the inside of heat-insulation chamber 1 is uniformly arranged 16, hot-fluid transmitting can be blocked, avoiding being generated heat due to PTC chip 8 damages printed circuit board.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (6)

1. a kind of overcurrent protection ceramic PTC element, including ceramic shell (11), ceramic inner housing (17) and PTC chip (8), It is characterized by: the internal top of the ceramic shell (11) is fixed with ceramic inner housing (17), ceramic inner housing (17) it is interior Portion is equipped with PTC chip (8), and fluted (21) are arranged in the open-topped outside of ceramic shell (11), groove (21) it is interior Portion is detachably equipped with top cover (7), is uniformly fixed with elastic u-shaped frame (18) on the inner wall at described ceramics inner housing (17) both ends, Elastic u-shaped frame (18) is fixedly connected with the both ends of PTC chip (8) simultaneously, and the two sides of the ceramics inner housing (17) all offer Lead to hole (12), the U-shaped frame of hard (6) is all fixed on ceramic inner housing (17) two sides outer wall on the outside of logical hole (12), and 2 hard It is all fixedly connected with metal splint (22) by the first spring (2) being uniformly arranged on the inner sidewall of the U-shaped frame of matter (6), while 2 Semiconductor chilling plate (13) and electrode (14), 2 electrodes (14) are successively clamped between metal splint (22) and PTC chip (8) Bottom be all provided with pin (15), 2 pins (15) all extend to ceramic shell (11) bottom outside.

2. a kind of overcurrent protection ceramic PTC element according to claim 1, it is characterised in that: the metal splint (22) it is uniformly fixed on lateral wall heat conducting bar (5), and is evenly arranged with aperture (3) on the U-shaped frame of hard (6), ceramics are outer It is uniformly provided with through-hole (4) at the position of shell (11) corresponding aperture (3), while the one of heat conducting bar (5) separate metal splint (22) Aperture (3) and through-hole (4) are run through in end.

3. a kind of overcurrent protection ceramic PTC element according to claim 1, it is characterised in that: the thickness of the top cover (7) The deep equality of degree and groove (21), and four angular positions of top cover (7) bottom are all fixed with limited post (20), while recessed The internal bottom end of slot (21) is provided with the limit jack (19) being mutually matched with limited post (20).

4. a kind of overcurrent protection ceramic PTC element according to claim 3, it is characterised in that: the limited post (20) Top be provided with spherical protrusions, and limit the internal two sides of jack (19) and be all fixed with arc at the position of inner tip Elastic slice, while arc spring lamination is equal with the diameter of spherical protrusions at a distance from limit jack (19) inner tip.

5. a kind of overcurrent protection ceramic PTC element according to claim 3, it is characterised in that: the bottom of the top cover (7) Portion passes through the second spring (10) being uniformly arranged and is fixedly connected with pressing plate (9), and the bottom end of pressing plate (9) and PTC chip (8) Top is fixedly connected.

6. a kind of overcurrent protection ceramic PTC element according to claim 1, it is characterised in that: the ceramics inner housing (17) it is equipped with heat-insulation chamber (1) inside the ceramic shell (11) below, and the inside of heat-insulation chamber (1) is evenly arranged with glass fibre Layer (16).