阅读说明：本技术 感应开关 (Induction switch ) 是由 周添铭 于 2020-05-18 设计创作，主要内容包括：一种感应开关,包含由多个陶瓷生坯堆叠后烧结制成的陶瓷本体、由金属材料设置于对应的陶瓷生坯制成的第一导电单元及第二导电单元,及导电件。所述陶瓷本体包括中层部、第一侧层部,及第二侧层部,所述中层部具有界定出通孔的内周面。所述第一导电单元包括设置于所述第一侧层部且具有第一接触面的第一导电层,所述第二导电单元包括设置于所述第二侧层部且具有第二接触面的第二导电层,所述第一接触面、第二接触面相邻所述通孔,所述内周面、所述第一接触面及所述第二接触面共同界定出感应腔。所述导电件容置于所述感应腔,且能在通路位置及断路位置之间移动来达到感应作用。而述感应开关能突破现有限制而能有效缩小整体体积。(An inductive switch comprises a ceramic body, a first conductive unit, a second conductive unit and a conductive piece, wherein the ceramic body is formed by stacking and sintering a plurality of ceramic green bodies, and the first conductive unit and the second conductive unit are formed by arranging metal materials on the corresponding ceramic green bodies. The ceramic body comprises a middle layer part, a first side layer part and a second side layer part, wherein the middle layer part is provided with an inner circumferential surface defining a through hole. The first conductive unit comprises a first conductive layer which is arranged on the first side layer part and is provided with a first contact surface, the second conductive unit comprises a second conductive layer which is arranged on the second side layer part and is provided with a second contact surface, the first contact surface and the second contact surface are adjacent to the through hole, and the inner peripheral surface, the first contact surface and the second contact surface define an induction cavity together. The conductive piece is accommodated in the induction cavity and can move between a path position and a circuit breaking position to achieve an induction effect. The inductive switch can break through the existing limitation and effectively reduce the whole volume.)

1. An inductive switch, comprising: comprises the following steps:

the ceramic body is formed by stacking and sintering a plurality of ceramic green bodies and comprises a middle layer part defining a through hole, a first side layer part arranged on one side of the middle layer part and used for sealing one end of the through hole, and a second side layer part arranged on the other side of the middle layer part and used for sealing the other end of the through hole, wherein the middle layer part is provided with an inner peripheral surface for defining the through hole, the first side layer part is provided with a first blind hole which is open towards the through hole, and the second side layer part is provided with a second blind hole which is open towards the through hole;

the first conductive unit is made of metal materials arranged on the corresponding ceramic green bodies, and comprises a first conductive layer arranged on the first blind hole and at least one first internal circuit connected with the first conductive layer and extending to the outer side of the ceramic body, wherein the first conductive layer is provided with a first contact surface adjacent to the through hole;

the second conductive unit is made of metal materials arranged on the corresponding ceramic green bodies and comprises a second conductive layer arranged on the second blind hole and at least one second internal circuit connected with the second conductive layer and extending to the outer side of the ceramic body, the second conductive layer is provided with a second contact surface adjacent to the through hole, and the inner peripheral surface, the first contact surface and the second contact surface define an induction cavity together; and

and the conductive piece is accommodated in the induction cavity and can move between a path position and a circuit breaking position, when the conductive piece is at the path position, the conductive piece, the first contact surface and the second contact surface form a current path, and when the conductive piece is at the circuit breaking position, the conductive piece, the first contact surface and the second contact surface do not form the current path.

2. The inductive switch of claim 1, wherein: the first conductive layer of the first conductive unit extends to the closed end of the first blind hole, the first internal circuit is connected with the first conductive layer at the closed end of the first blind hole and extends outwards, the second conductive layer of the second conductive unit extends to the closed end of the second blind hole, and the second internal circuit is connected with the second conductive layer at the closed end of the second blind hole and extends outwards.

3. The inductive switch of claim 1, wherein: the ceramic body is formed by stacking the ceramic green bodies along an axis, the first internal circuit of the first conductive unit extends outwards along the corresponding ceramic green bodies, and the second internal circuit of the second conductive unit extends outwards along the corresponding ceramic green bodies.

4. The inductive switch of claim 1, wherein: the first side layer part, the middle layer part and the second side layer part of the ceramic body are arranged along an axis, the first contact surface and the second contact surface are respectively two arc surfaces which are opposite and take the axis as the center, and the centers of the first contact surface and the second contact surface are sunken towards the direction far away from the through hole.

5. The inductive switch of claim 4, wherein: the conductive piece is spherical, when the conductive piece is contacted with the first contact surface and the second contact surface simultaneously, on a vertical section passing through the center of the conductive piece, the included angle between the center of the conductive piece and the contact point of the first contact surface and the contact point of the second contact surface is theta, and theta is more than 80 degrees and less than 100 degrees.

6. The inductive switch of claim 1, wherein: the first conductive unit and the second conductive unit are made by metal materials through screen printing, steel plate printing or ink jet printing by conductive adhesive, or through alternate use of electroplating, chemical plating or sputtering, arranged on corresponding ceramic green bodies, and jointly stacked and sintered.

7. The inductive switch of claim 1, wherein: the ceramic body is in a cuboid shape, the inductive switch further comprises an external electrode unit arranged on the outer surface of the ceramic body, the external electrode unit comprises at least one first external electrode connected with the first internal circuit and at least one second external electrode connected with the second internal circuit, the first external electrode extends to the second lateral layer part from the first lateral layer part along one side edge of the ceramic body, the second external electrode extends to the second lateral layer part from the other side edge of the ceramic body from the first lateral layer part, and the first external electrode and the second external electrode respectively extend to the surface of the side edge adjacent to the ceramic body.

Technical Field

The present invention relates to a switch, and more particularly, to an inductive switch.

Background

The existing ball type inductive switch is arranged on a circuit board, and senses the vibration of the switch by the ball inside and transmits the sensing result to the circuit board, so that the ball type inductive switch can be used for a safety alarm device, an anti-theft device, a toy capable of sensing action and the like.

However, the conventional inductive switch is a package formed by a non-conductive housing and two electrodes, and the conductive element is packaged in an internal cavity of the package, and the non-conductive housing and the electrodes need to be connected tightly by a clamping structure or a clamping part (for example, the inductive switch disclosed in japanese patent application laid-open No. 2003-161653), so that the volume of the conventional inductive switch is limited and cannot be reduced.

Disclosure of Invention

The invention aims to provide an inductive switch which can reduce parts and volume.

The inductive switch comprises a ceramic body, a first conductive unit, a second conductive unit and a conductive piece.

The ceramic body is formed by stacking and sintering a plurality of ceramic green bodies, and comprises a middle layer part defining a through hole, a first side layer part arranged on one side of the middle layer part and used for sealing one end of the through hole, and a second side layer part arranged on the other side of the middle layer part and used for sealing the other end of the through hole, wherein the middle layer part is provided with an inner peripheral surface for defining the through hole, the first side layer part is provided with a first blind hole which is open towards the through hole, and the second side layer part is provided with a second blind hole which is open towards the through hole.

The first conductive unit is made of metal materials arranged on the corresponding ceramic green bodies, the first conductive unit comprises a first conductive layer arranged on the first blind hole and at least one first internal circuit connected with the first conductive layer and extending to the outer side of the ceramic body, and the first conductive layer is provided with a first contact surface adjacent to the through hole.

The second conductive unit is made of metal materials arranged on the corresponding ceramic green bodies, the second conductive unit comprises a second conductive layer arranged on the second blind hole and at least one second internal circuit connected with the second conductive layer and extending to the outer side of the ceramic body, the second conductive layer is provided with a second contact surface adjacent to the through hole, and the inner peripheral surface, the first contact surface and the second contact surface define a sensing cavity together.

The conductive piece is accommodated in the induction cavity and can move between a path position and a circuit breaking position, when the conductive piece is at the path position, the conductive piece, the first contact surface and the second contact surface form a current path, and when the conductive piece is at the circuit breaking position, the conductive piece, the first contact surface and the second contact surface do not form the current path.

In the inductive switch of the present invention, the first conductive layer of the first conductive unit extends to the closed end of the first blind hole, the first internal circuit is connected to the first conductive layer at the closed end of the first blind hole and extends outward, the second conductive layer of the second conductive unit extends to the closed end of the second blind hole, and the second internal circuit is connected to the second conductive layer at the closed end of the second blind hole and extends outward.

In the inductive switch of the invention, the ceramic body is formed by stacking the ceramic green bodies along an axis, the first internal circuit of the first conductive unit extends outwards along the corresponding ceramic green body, and the second internal circuit of the second conductive unit extends outwards along the corresponding ceramic green body.

In the inductive switch of the invention, the first side layer part, the middle layer part and the second side layer part of the ceramic body are arranged along an axis, the first contact surface and the second contact surface are respectively two arc surfaces which are opposite and take the axis as the center, and the centers of the first contact surface and the second contact surface are sunken towards the direction far away from the through hole.

The inductive switch of the invention is characterized in that the conductive piece is spherical, when the conductive piece contacts the first contact surface and the second contact surface simultaneously, on a vertical section passing through the center of the conductive piece, the included angle between the center of the conductive piece and the contact point of the first contact surface and the contact point of the second contact surface is theta, and theta is more than 80 degrees and less than 100 degrees.

The first conductive unit and the second conductive unit are made of metal materials through screen printing, steel plate printing or ink jet printing by conductive adhesives, or through alternate insertion of electroplating, chemical plating or sputtering on corresponding ceramic green bodies, common stacking and sintering.

The inductive switch of the invention is characterized in that the ceramic body is in a cuboid shape, the inductive switch also comprises an external electrode unit arranged on the outer surface of the ceramic body, the external electrode unit comprises at least one first external electrode connected with the first internal circuit and at least one second external electrode connected with the second internal circuit, the first external electrode extends from the first lateral layer part to the second lateral layer part along one side edge of the ceramic body, the second external electrode extends from the other side edge of the ceramic body to the second lateral layer part from the first lateral layer part, and the first external electrode and the second external electrode respectively extend to the surfaces of the adjacent side edges of the ceramic body.

The invention has the beneficial effects that: the ceramic body is made by stacking and sintering the ceramic green bodies, and the first conductive unit and the second conductive unit are made of metal materials and arranged on the ceramic green bodies, so that the whole volume of the induction switch can break through the minimum volume limit of the existing switch made of plastics, a more simplified structure and a smaller volume can be obtained, in addition, better sealing performance can be obtained, and the first conductive unit and the second conductive unit are not easy to damp and damage, so the aim of the invention can be really achieved.

Drawings

Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of an embodiment of an inductive switch of the present invention;

FIG. 2 is a front view of the embodiment;

FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a schematic cross-sectional view taken along line V-V in FIG. 2, illustrating the rolling elements in the open and closed positions; and

fig. 6 is an exploded perspective view of the embodiment illustrating the first embodiment made from a plurality of ceramic green bodies stacked together.

Detailed Description

Furthermore, the terms "upper", "lower", "top", "bottom", and "bottom" used in the description of the present invention are used for convenience only to indicate relative orientations between elements, and do not limit the actual manufacturing or use directions of the respective elements.

Referring to fig. 1, 2 and 3, the embodiment of the inductive switch of the present invention includes a ceramic body 1, a first conductive unit 2, a second conductive unit 3, an external electrode unit 5, and a conductive member 6.

The ceramic body 1 is formed by stacking and sintering a plurality of ceramic green compacts 100, and in addition, the ceramic body 1 is rectangular, and includes a middle layer portion 11 defining a through hole 110, a first side layer portion 12 disposed on one side of the middle layer portion 11 along an axis L and sealing one end of the through hole 110, and a second side layer portion 13 disposed on the other side of the middle layer portion 11 along the axis L and sealing the other end of the through hole 110. The middle layer 11 has an inner peripheral surface 111 defining the through hole 110, the first side layer 12 has a first blind hole 121 open to the through hole 110, and the second side layer 13 has a second blind hole 131 open to the through hole 110. The first blind hole 121 has a closed end 122 away from the through hole 110, and the second blind hole 131 has a closed end 132 away from the through hole 110.

Referring to fig. 3 to 6, the first conductive element 2 is made of a metal material disposed on the corresponding ceramic green body 100, and the first conductive element 2 includes a first conductive layer 21 disposed on the first blind via 121, at least one first internal circuit 22 connected to the first conductive layer 21 and extending to the outside of the ceramic body 1, and a first series circuit 23 extending inside the second side layer portion 13. The first conductive layer 21 extends to the closed end 122 of the first blind hole 121 and has a first contact surface 211 adjacent to the through hole 110, in the embodiment, the first conductive unit 2 includes two first internal traces 22, the first internal traces 22 are connected to the first conductive layer 21 at the closed end 122 of the first blind hole 121 and extend outwards to two diagonally opposite sides of the ceramic body 1 along the corresponding ceramic green body 100, and the first series trace 23 extends to the two diagonally opposite sides of the ceramic body 1 relative to the first internal traces 22.

The second conductive unit 3 is made of a metal material and is disposed on the corresponding ceramic green body 100, and the second conductive unit 3 includes a second conductive layer 31 disposed on the second blind hole 131, at least one second internal circuit 32 connected to the second conductive layer 31 and extending to the outside of the ceramic body 1, and a second serial circuit 33 extending inside the first lateral layer 12. The second conductive layer 31 extends to the closed end 132 of the second blind hole 131 and has a second contact surface 311 adjacent to the through hole 110. In the present embodiment, the second conductive unit 3 includes two second inner lines 32, the second inner lines 32 are connected to the second conductive layer 31 at the closed ends 132 of the second blind holes 131 and extend outward along the corresponding ceramic green bodies 100 to two other diagonally opposite sides of the ceramic body 1, and the second serial lines 33 extend to the two other diagonally opposite sides of the ceramic body 1 relative to the second inner lines 32.

The inner peripheral surface 111 of the ceramic body 1, the first contact surface 211 of the first conductive unit 2, and the second contact surface 311 of the second conductive unit 3 define a sensing chamber 200. In this embodiment, the first contact surface 211 and the second contact surface 311 are two arc surfaces facing each other and centered on the axis L, and the centers of the first contact surface 211 and the second contact surface 311 are recessed in a direction away from the through hole 110.

Referring to fig. 1, 3 and 4, the external electrode unit 5 is disposed on the outer surface of the ceramic body 1, and the external electrode unit 5 includes two first external electrodes 51 connected to the first internal circuit 22 and the first serial circuit 23, one second external electrode 52 connected to the second internal circuit 32 and the second serial circuit 33, and two third external electrodes 53 connected to the second internal circuit 32 and the second serial circuit 33, respectively. The first external electrode 51 extends from the first lateral layer 12 to the second lateral layer 13 along the two diagonally opposite sides of the ceramic body 1, the second external electrode 52 and the third external electrode 53 are respectively disposed on the two other diagonally opposite sides parallel to the first lateral sides, the second external electrode 52 extends from the first lateral layer 12 to the second lateral layer 13 and is disposed on one of the two other diagonally opposite sides, and the third external electrode 53 is disposed on the other one of the two other diagonally opposite sides and is disposed at a corner.

Referring to fig. 5, the conductive member 6 is accommodated in the sensing chamber 200 and can move between a closed position and an open position, when the conductive member 6 is in the closed position (see the position of the solid line in fig. 5), the conductive member 6, the first contact surface 211 and the second contact surface 311 form a current path, and when the conductive member 6 is in the open position (see the position of a chain line in fig. 5), the conductive member 6, the first contact surface 211 and the second contact surface 311 do not form the current path.

In the embodiment, the conductive element 6 is spherical, when the conductive element 6 contacts the first contact surface 211 and the second contact surface 311 simultaneously, on a vertical cross section passing through a center of the conductive element 6, an angle between a center of the conductive element 6 and a contact point of the first contact surface 211 and a contact point of the second contact surface 311 is θ, and θ is greater than 80 ° < θ < 100 °, and θ is 90 ° in the embodiment.

When in use, the inductive switch is soldered to a circuit board (not shown) by the external electrode unit 5, wherein the inductive switch can be soldered to the circuit board in different directions according to the requirements of users or manufacturers by the arrangement positions of the first external electrode 51 and the second external electrode 52.

In the using process, when the ceramic body 1 is placed with the axis L in a horizontal state, the rolling element 6 is located at the open position (see the position of the solid line in fig. 5), the rolling element 6 simultaneously contacts the first contact surface 211 and the second contact surface 311 to form the current path together, and when the ceramic body 1 vibrates to separate the rolling element 6 from at least one of the first contact surface 211 and the second contact surface 311, the rolling element 6 is located at the open position (see the position of a point of the chain line in fig. 5), and the rolling element 6, the first contact surface 211 and the second contact surface 311 do not form the current path.

Referring to fig. 6, it should be noted that the present embodiment is manufactured by using a Multi-layer ceramic (MLC) technique, and the manufacturing process is described as follows:

the method comprises the following steps: a plurality of ceramic green bodies 100 made of an inorganic ceramic material are prepared, and a cavity is formed in the ceramic green bodies 100 by machining.

Step two: a metal material, for example: silver, gold, palladium, copper, nickel or the like or alloys thereof are processed by screen printing, steel plate printing, ink jet printing or the like with conductive paste, or are alternately inserted and used on the surface of the corresponding ceramic green body 100 by electroplating, chemical plating, sputtering or the like, so as to form the first conductive unit 2 and the second conductive unit 3.

Step three: the punched ceramic green compacts 100 with the circuit disposed thereon are stacked and aligned along the axis L, and then the stacked ceramic green compacts 100 are compacted in a pressure equalizing manner to form the middle layer portion 11, the first side layer portion 12, and the second side layer portion 13, wherein the ceramic green compacts 100 form the middle layer portion 11, the first side layer portion 12, and the second side layer portion 13, and the metal material disposed on the ceramic green compacts 100 form the first conductive unit 2 and the second conductive unit 3. In addition, the first side portion (or the second side portion 13) and the middle portion 11 are stacked together and thermally pressed to be integrated, and the second side portion 13 (or the first side portion 12) is stacked separately and thermally pressed.

Step four: the tightly compacted ceramic green body 100 is cut to a predetermined size.

Step five: plating, spraying or coating a protective metal on the surfaces of the first conductive unit 2 and the second conductive unit 3 according to requirements, for example: gold, alloys, and the like.

Step six: and raising the temperature of the environment at a slow temperature raising rate, heating the cut ceramic green body 100, and burning out and cracking the polymer additive added when the ceramic green body 100 is pulped, so that the ceramic green body 100 is densified to remove pores. Note that the ceramic green sheets 100 after heating are sintered integrally with each other, and the layered state shown in fig. 3, 4, and 5 is only to illustrate that the ceramic body 1 is formed of the multilayer ceramic green sheets 100, and is not an actual structural state after completion of sintering.

Step seven: placing the conductive member 6 into the through hole 110 of the middle layer 11, coating adhesive material such as resin or glass on the corresponding positions of the second side layer 13 (or the first side layer 12) and the middle layer 11, heating the ambient temperature to below 500 ℃ by UV irradiation or baking to heat the adhesive material, and pressing and bonding the second side layer 13 (or the first side layer 12) and the middle layer 11 into a whole to form the ceramic body 1.

Step eight: the external electrode unit 5 is formed by plating, spraying or coating a metal, such as silver, gold, palladium, copper, nickel, etc., or an alloy thereof, on the outer surface of the bonded ceramic body 1, and the first external electrode 51, the second external electrode 52 and the third external electrode 53 are densified to have good conductivity.

It should be noted that, after the second step, the ceramic green body 100 provided with the metal may be bonded to form one or more blocks, then fired to form one or more ceramic blocks in the following step, and then the ceramic blocks are bonded by glass, metal or resin, and then heat treated to form the integrated ceramic body 1, without being limited to the above steps.

However, the manufacturing process of the inductive switch of the present invention is not limited thereto, and one skilled in the art can change the order of some steps or replace some manufacturing methods in other ways as required.

In summary, the inductive switch of the present invention is manufactured by stacking and sintering the ceramic green bodies 100 with the ceramic body 1, and the first conductive elements 2 and the second conductive elements 3 are made of metal materials and disposed on the ceramic green bodies 100, so that the overall volume of the inductive switch can break through the minimum volume limit of the existing switches made of plastic, and a more compact structure and a smaller volume can be obtained, and in addition, better sealing performance can be obtained, and the first conductive elements 2 and the second conductive elements 3 are not easily damaged by moisture, thereby achieving the purpose of the present invention.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.