CN211654690U - Induction switch - Google Patents

Abstract

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 compacts, the first conductive unit and the second conductive unit are made of metal materials, and the conductive piece is made of metal materials. The ceramic body comprises a middle layer part, a lower layer part and an upper layer part, wherein the middle layer part is provided with an inner surface, and the lower layer part is provided with a blind hole which is opened towards the cavity. The first conductive unit includes a first conductive layer covering an inner surface of the middle layer portion. The second conductive unit comprises a second conductive layer which is at least arranged in the blind hole and is concave. The conductive member is conductive and can roll and locate in the stated cavity, the stated conductive member is used for forming the current path with stated first conducting layer and stated second conducting layer. The ceramic body is made by sintering the ceramic green bodies after being stacked, so that the induction switch can break through the existing limitation and effectively reduce the whole volume.

Description

Induction switch

Technical Field

The utility model relates to a switch especially relates to an inductive switch.

Background

The existing ball type inductive switch is arranged on a circuit board, senses the change of an angle by an internal ball 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 ball type inductive switch has many parts and its volume is limited, so that it is difficult to reduce the size.

Disclosure of Invention

An object of the utility model is to provide a can reduce part, reduce inductive switch of volume.

The utility model discloses an inductive switch contains ceramic body, first electrically conductive unit, the electrically conductive unit of second, and electrically conductive.

The ceramic body is made by sintering a plurality of ceramic green compact stacks, and the ceramic body comprises a middle layer part defining a cavity, a lower layer part arranged at the bottom of the middle layer part and sealing the bottom of the cavity, and an upper layer part arranged at the top of the middle layer part and sealing the top of the cavity, wherein the middle layer part is provided with an inner surface adjacent to the cavity, the lower layer part is provided with a top surface adjacent to the cavity, and a blind hole formed on the top surface and facing the cavity.

The first conductive unit is made of a metal material and arranged on the ceramic green body, and comprises a first conductive layer covering the inner surface of the middle layer part and at least one first internal circuit connected with the first conductive layer and extending to the outer side of the ceramic body. The second conductive unit by metal material set up in ceramic green ware is made, the second conductive unit including set up at least in the blind hole just is recessed second conducting layer, and at least one is connected the second conducting layer outwards extends to the second internal line in the ceramic body outside.

The conductive piece can be located in the cavity in a rolling mode, the conductive piece can move between a first open circuit position and a closed circuit position, when the conductive piece is located at the first open circuit position, the first conductive layer, the conductive piece and the second conductive layer form a current path, when the conductive piece is located at the closed circuit position, the first conductive layer, the conductive piece and the second conductive layer do not form the current path, and when the ceramic body is horizontally placed in a mode that the lower layer portion, the middle layer portion and the upper layer portion are sequentially arranged from bottom to top, the conductive piece is limited by the second conductive layer and located at the closed circuit position.

The utility model discloses an inductive switch, ceramic body's lower floor portion still has the connection the interior hole face of top surface, and connect the terminal surface of interior hole face, interior hole face reaches the terminal surface is defined out the blind hole, the second conducting layer of the electrically conductive unit of second cover in the interior hole face and the top surface of lower floor portion.

The utility model discloses an inductive switch, the interior hole face and the top surface of ceramic body's lower floor portion press from both sides the angle, the angle is the obtuse angle.

The utility model discloses an inductive switch, the second conducting layer stack of the electrically conductive unit of second in the blind hole, just the second conducting layer has and is used for contacting the top surface of electrically conductive piece, the top surface of second conducting layer is the arcuation, and keeps away from towards the direction of cavity is sunken.

The utility model discloses an inductive switch, the blind hole of ceramic body's lower floor's portion still has open end, and blind end, the second conducting layer of the electrically conductive unit of second extends to the blind end of blind hole, the second inner line in the blind end is connected the second conducting layer outwards extends.

The utility model discloses an inductive switch, the first internal line of first electrically conductive unit extend in ceramic body's mid portion reaches lower floor portion is occasionally the mid portion reaches between the upper strata portion.

The utility model discloses an inductive switch, electrically conductive piece is globular or cylindric, and the radius is r, ceramic body's lower part portion the mid portion reaches an axis stack is followed to the upper part portion, electrically conductive piece in perpendicular in the cavity the maximum roll distance of axis is d, and 3r < d <4 r.

The utility model discloses an inductive switch, ceramic body's upper portion has the bottom surface, and is formed at bottom surface and court the open blind hole of cavity, inductive switch still contains the electrically conductive unit of third, the electrically conductive unit of third sets up in the ceramic unburned bricks that correspond by metal material and makes, and including set up at least in the blind hole of upper portion just is the third conducting layer of concavity, and at least one is connected the third conducting layer outwards extends to the third internal line in the ceramic body outside, electrically conductive piece can be in second access position first access position reaches the position of opening a circuit removes between the position of opening a circuit, works as electrically conductive piece is in during second access position, first conducting layer, electrically conductive piece reaches the third conducting layer forms the electric current route, works as electrically conductive piece is in when the position of opening a circuit, first conducting layer electrically conductive piece, The second conductive layer and the third conductive layer do not form a current path, and when the ceramic body is turned upside down and horizontally placed, the conductive piece is limited by the third conductive layer to be positioned at the open circuit position.

The utility model discloses an inductive switch, ceramic body's upper portion has adjacently the bottom surface of cavity, inductive switch still contains the third electrically conductive unit, the third electrically conductive unit sets up in the ceramic unburned bricks that corresponds by metal material and makes, and including set up in the third conducting layer of upper portion, and at least one is connected the third conducting layer outwards extends to the third internal line in the ceramic body outside, the third conducting layer has the protrusion the bulge of the bottom surface of upper portion, electrically conductive piece can be in second access position first access position reaches the position of opening a circuit moves between the position, works as electrically conductive piece is in when second access position, first conducting layer electrically conductive piece reaches the third conducting layer forms the electric current route, works as electrically conductive piece is in when the position of opening a circuit, first conducting layer electrically conductive piece, The second conductive layer and the third conductive layer do not form a current path, and when the ceramic body is turned upside down and horizontally placed, the conductive member is positioned at the second path position by being limited by the protruding part of the third conductive layer.

The utility model discloses an inductive switch, first electrically conductive unit reaches the electrically conductive unit of second is executed by metal material with modes processing such as otter board, steel sheet or inkjet by conducting resin, or is alternated in turn by modes such as electroplating, chemical plating, sputtering and uses and set up behind the ceramic unburned bricks that correspond, common storehouse, sintering are made.

The beneficial effects of the utility model reside in that: utilize the ceramic body by sintering behind the pottery unburned bricks stack is made, and first electrically conductive unit the electrically conductive unit of second by metal material set up in the pottery unburned bricks is made, enables induction switch integration and can effectively reduce the part to make whole volume break through the minimum volume restriction of the switch that has now made with plastics, and obtain more structure and littleer volume of retrenching, can also obtain the leakproofness of preferred simultaneously, make first electrically conductive unit the electrically conductive unit of second is difficult for weing the damage.

Drawings

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

fig. 1 is a perspective view of a first embodiment of the inductive switch of the present invention;

FIG. 2 is a top view of the first embodiment;

FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. 2, illustrating a ceramic body made from a stack of multiple ceramic green bodies, but actually sintered together without delamination after the ceramic green bodies are made;

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 a conductive member in a break position and a first pass position;

FIG. 6 is an exploded perspective view of the first embodiment, illustrating the first embodiment being made from a plurality of ceramic green body stacks;

fig. 7 is a schematic cross-sectional view similar to fig. 5 of a second embodiment of the inductive switch of the present invention, illustrating a conductive member in a circuit interrupting position and a first circuit interrupting position;

FIG. 8 is a schematic sectional view taken along line VIII-VIII in FIG. 7;

fig. 9 is a schematic cross-sectional view similar to fig. 5 of a third embodiment of the inductive switch of the present invention, illustrating a conductive member in a circuit interrupting position and a first circuit interrupting position;

fig. 10 is a perspective view of a fourth embodiment of the inductive switch of the present invention;

FIG. 11 is a top view of the fourth embodiment;

FIG. 12 is a schematic cross-sectional view taken along line XII-XII in FIG. 11;

FIG. 13 is a schematic cross-sectional view taken along line XIII-XIII in FIG. 11;

FIG. 14 is a schematic cross-sectional view taken along line XIV-XIV in FIG. 11; and

fig. 15 is a schematic cross-sectional view similar to fig. 14 of the fourth embodiment, illustrating a state where one ceramic body is upside down and horizontally placed.

Detailed Description

Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same reference numerals.

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 to 3, a first embodiment of the inductive switch of the present invention includes a ceramic body 1, a first conductive unit 2, a second conductive unit 3, a third conductive unit 4, an external electrode unit 5, and a conductive member 6.

Referring to fig. 3, 4 and 6, the ceramic body 1 is formed by stacking and sintering a plurality of ceramic green compacts 100, and the ceramic body 1 is rectangular and includes a middle layer 11 defining a cavity 10, a lower layer 12 disposed at the bottom of the middle layer 11 along an axis L and closing the bottom end of the cavity 10, and an upper layer 13 disposed at the top of the middle layer 11 along the axis L and closing the top end of the cavity 10.

The middle portion 11 has an inner surface 111 adjacent to the chamber 10, the lower portion 12 has a top surface 121 adjacent to the chamber 10, an inner hole surface 122 connecting the top surface 121, and a connecting memberAn end surface 123 of the inner bore surface 122, the inner bore surface 122 and the end surface 123 defining a blind bore 124 formed in the top surface 121 and open to the chamber 10. The upper portion 13 of the ceramic body 1 has a bottom surface 131 adjacent to the chamber 10, an inner hole surface 132 connected to the bottom surface 131, and an end surface 133 connected to the inner hole surface 132, wherein the inner hole surface 132 and the end surface 133 define a blind hole 134 formed in the bottom surface 131 and opened toward the chamber 10. The inner bore surface 122 of the lower portion 12 forms an angle θ with the top surface 121₁Said angle θ₁The blind hole 124 is rounded perpendicular to the axis L and has an open end 124a and a closed end 124b, and specifically, the inner hole surface 122 has a vertical portion 122a substantially perpendicular to the top surface 121 and extending from the open end 124a to the closed end 124b, and a chamfered portion 122b connected between the vertical portion 122a and the top surface 121 and forming the angle with the top surface 121. The blind hole 134 of the upper portion 13 also has an open end 134a and a closed end 134b, and the structures of the upper portion 13 and the lower portion 12 are symmetrical in this embodiment, so that the detailed description thereof is omitted.

The first conductive unit 2 is made of a metal material and disposed on the corresponding ceramic green body 100, and the first conductive unit 2 includes a first conductive layer 21 covering the inner surface 111 of the middle layer 11, and at least one first internal circuit 22 connected to the first conductive layer 21 and extending to the outside of the ceramic body 1. In the present embodiment, the first conductive unit 2 includes four first internal wires 22, two of the first internal wires 22 extend between the middle portion 11 and the lower portion 12 of the ceramic body 1, the other two first internal wires 22 extend between the middle portion 11 and the upper portion 13, and the first internal wires 22 extend along the corresponding ceramic green body 100 to two opposite sides of the ceramic body 1.

The second conductive unit 3 is made of a metal material and disposed on the corresponding ceramic green body 100, and the second conductive unit 3 includes at least one second conductive layer 31 disposed on the blind hole 124 and having a concave shape, and at least one second internal circuit 32 connected to the second conductive layer 31 and extending outward to the outside of the ceramic body. In this embodiment, the second conductive layer 31 covers the inner hole surface 122 and the top surface 121 of the lower portion 12 and extends to the closed end 124b of the blind hole 124, and the second conductive unit 3 includes two second internal circuits 32, wherein the second internal circuits 32 are connected to the second conductive layer 31 at the closed end 124b and extend outwards to the other two opposite sides of the ceramic body 1 along the corresponding ceramic green-forms 100.

The third conductive unit 4 is made of a metal material and is disposed on the corresponding ceramic green body 100, and includes a third conductive layer 41 which is disposed on the blind hole 134 of the upper portion 13 and is concave upward, and at least one third inner circuit 42 which is connected to the third conductive layer 41 and extends outward to the outside of the ceramic body. In this embodiment, the third conductive layer 41 covers the inner hole surface 132 and the bottom surface 131 of the upper portion 13 and extends to the closed end 134b of the blind hole 134, and the third conductive unit 4 includes two third internal circuits 42, the third internal circuits 42 are connected to the third conductive layer 41 at the closed end 134b and extend outwards to two opposite sides of the ceramic body 1 along the corresponding ceramic green bodies 100, and the extending direction of the third internal circuits is the same as that of the second internal circuit 32.

Referring to fig. 1, 3 and 4, the external electrode unit 5 is disposed on the outer surface of the ceramic body 1, the external electrode unit 5 includes four first external electrodes 51 respectively connected to the first internal traces 22 and four second external electrodes 52 respectively connected to the second internal traces 32 and the third internal traces 42, the first external electrodes 51 and the second external electrodes 52 are respectively disposed at corners of the ceramic body 1 and cover three adjacent planes of the ceramic body 1, and two of the second external electrodes 52 are connected to each other along one side of the ceramic body 1 to determine the direction of the inductive switch from the outside and to connect the first conductive unit 2 and the second conductive unit 3 in series.

Referring to fig. 5, the conductive member 6 is rollably positioned in the chamber 10, and the conductive member 6 is movable between a first passage position (see the position of one dotted chain line in fig. 5), a second passage position (not shown, symmetrical to the first passage position), and a disconnection position (see the position of solid line in fig. 5). When the conductive member 6 is in the first passage position, the first conductive layer 21, the conductive member 6, and the second conductive layer 31 form a current passage. When the conductive member 6 is in the second path position, the first conductive layer 21, the conductive member 6, and the third conductive layer 41 form a current path. When the conductive member 6 is in the open position, the first conductive layer 21, the conductive member 6, the second conductive layer 31, and the third conductive layer 41 do not form a current path. Furthermore, when the ceramic body 1 is turned upside down and placed horizontally, the conductive member 6 is positioned at the open position by being restricted by the third conductive layer 41. When the ceramic body 1 is horizontally placed from the bottom to the top in the order of the lower portion 12, the middle portion 11 and the upper portion 13, the conductive member 6 is limited by the second conductive layer 31 and is positioned at the open circuit position.

In this embodiment, the conductive member 6 is spherical and has a radius r, the chamber 10 is cylindrical around the axis L, the maximum rolling distance of the conductive member 6 in the chamber 10 perpendicular to the axis L is d, and 3r<d<4r, respectively. In other embodiments, the conductive member 6 may be cylindrical, and the chamber 10 may be rectangular, but not limited thereto. In addition, in this embodiment, the conductive member 6 rolls completely from the blind hole 124 of the lower portion 12 to above the top surface 121 of the lower portion 12 (or rolls completely from the blind hole 134 of the upper portion 13 to above the bottom surface 131 of the upper portion 13 when the conductive member is turned upside down), and the rolling angle θ is₂Is 45 deg., but not limited thereto.

When in use, the inductive switch is soldered to a circuit board (not shown) by the first and second external electrodes 51 and 52 of 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 and second external electrodes 51 and 52.

In use, when the ceramic body 1 is horizontally placed from bottom to top in the order of the lower portion 12, the middle portion 11 and the upper portion 13, the conductive member 6 is positioned by the shape of the second conductive layer 31 to contact only the second conductive layer 31, and at this time, the conductive member 6 is located at the open circuit position (see the position of the solid line in fig. 5) without forming a current path; when the ceramic body 1 is tilted or vibrated to separate the conductive member 6 from the positioning of the second conductive layer 31 and simultaneously contact the first conductive layer 21 and the second conductive layer 31, the conductive member 6 is located at the first path position (see the position of a chain line in fig. 5), and the first conductive layer 21, the conductive member 6 and the second conductive layer 31 form a current path, thereby achieving an induction effect. In the embodiment, the structure is symmetrical up and down, so that the same induction effect can be achieved when the ceramic body 1 is used upside down.

It is further noted that, in the present embodiment, by setting the relationship between the radius r of the conductive member 6 and the maximum rolling distance d perpendicular to the axis L as 3r < d <4r, the overall size can be effectively reduced, and meanwhile, excessive sensitivity can be avoided.

In addition, in other embodiments, the inductive switch may also include more than two conductive members 6, for example, two conductive members 6 with smaller radius are commonly accommodated in the cavity 10, and when the ceramic body 1 is horizontally placed, the conductive members 6 are simultaneously positioned in the open circuit position by the shape of the second conductive layer 31.

Referring to fig. 3, 4 and 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 a screen, a steel plate, ink jet or the like using a conductive adhesive, 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, the second conductive unit 3 and the third conductive unit 4.

Step three: the punched ceramic green sheets 100 with circuits are stacked and aligned along the axis L, and then the stacked ceramic green sheets 100 are tightly compacted by hot water pressure equalizing to form the lower layer 12, the middle layer 11, and the upper layer 13, wherein the ceramic green sheets 100 form the lower layer 12, the middle layer 11, and the upper layer 13, and the metal materials disposed on the ceramic green sheets 100 form the first conductive unit 2, the second conductive unit 3, and the third conductive unit 4. In the present embodiment, the lower portion 12 is formed by stacking two ceramic green compacts 100, the middle portion 11 is formed by stacking eight ceramic green compacts 100, and the upper portion 13 is formed by stacking two ceramic green compacts 100, but not limited thereto. In addition, in the present embodiment, the lower portion 12 and the middle portion 11 are stacked and thermally pressed together, and the upper portion 13 is stacked and thermally pressed separately.

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

Step five: and raising the environment temperature to 400-600 ℃ at a slow temperature rise rate, heating the cut ceramic green body 100 to burn out and crack the polymer additive added when the ceramic green body 100 is pulped, and then raising the environment temperature to 800-900 ℃ to densify the ceramic green body 100 and remove the holes. 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 merely to illustrate that the ceramic body 1 is made of a multilayer ceramic green sheet 100, and is not an actual structural state after completion of sintering.

Step six: plating, spraying or coating a protective metal on the surfaces of the first conductive unit 2, the second conductive unit 3 and the third conductive unit 4 according to requirements, for example: gold, alloy …, and the like.

Step seven: placing the conductive member 6 into the cavity 10 of the middle layer 11, coating an adhesive material such as resin or glass on the corresponding portions of the upper layer 13 and the middle layer 11, heating the upper layer 13 and the middle layer 11 to 300-500 ℃ by UV irradiation or baking to heat the adhesive material, and pressing and bonding the upper layer 13 and the middle layer 11 together to form the complete ceramic body 1.

Step eight: the outer surface of the bonded ceramic body 1 is coated with a metal, such as silver, gold, palladium, copper, nickel or their alloys, to form the first external electrode 51 and the second external electrode 52 of the external electrode unit 5.

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 sintered to form one or more ceramic blocks in the following steps, 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.

In addition, the manufacturing process of the inductive switch of the present invention can be changed by a person skilled in the art according to the requirement, or can be replaced by another method, which is not limited to the description in this specification.

The advantages of the present embodiment are summarized as follows through the above description:

1. the ceramic body 1 is formed by stacking and sintering the ceramic green bodies 100, and the first conductive unit 2, the second conductive unit 3 and the third conductive unit 4 are made of metal materials and arranged on the ceramic green bodies 100, 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 2, the second conductive unit 3 and the third conductive unit 4 are not easy to be affected with damp and damaged.

2. By providing the inner hole surface 122 of the lower portion 12 with the chamfered portion 122b, the attachment area of the second conductive layer 31 can be increased, so as to prevent the metal material from falling off and affecting the sensing. The upper portion 13 and the lower portion 12 are symmetrical in structure, so that the adhesion area of the third conductive layer 41 can be increased to achieve the same effect.

3. The relationship between the radius r of the conductive piece 6 and the maximum rolling distance d vertical to the axis L is 3r < d <4r, so that the whole volume can be effectively reduced, and the excessive sensitivity of the conductive piece is avoided.

Referring to fig. 7 and 8, a second embodiment of the inductive switch of the present invention is similar to the first embodiment, and the difference is:

the inner hole surfaces 122, 132 of the lower part 12 and the upper part 13 of the ceramic body 1 are inclined from the open ends 124a, 134a to the closed ends 124b, 134b, and respectively form an angle θ with the top surface 121 of the lower part 12 and the bottom surface 131 of the upper part 13₁The angle is an obtuse angle. Furthermore, the cross section of the blind holes 124, 134 perpendicular to the axis L is square.

Referring to fig. 9, a third embodiment of the inductive switch of the present invention is similar to the first embodiment, and the difference is:

the second conductive layer 31 of the second conductive unit 3 is stacked in the blind hole 124, and the second conductive layer 31 has a top surface 121 for contacting the conductive member 6, and the top surface 121 of the second conductive layer 31 is arc-shaped and is recessed in a direction away from the chamber 10. The structure of the three conductive units 4 is symmetrical to the second conductive unit 3, and therefore, the description thereof is omitted.

Referring to fig. 10 to 15, a fourth embodiment of the inductive switch of the present invention is similar to the third embodiment, and the difference is:

referring to fig. 12, the third conductive layer 41 of the third conductive unit 4 has a protrusion 411 protruding from the bottom surface 131 of the upper portion 13, and a top surface 121 of the protrusion 411 is arc-shaped and protrudes toward the second conductive layer 31. When the ceramic body 1 is turned upside down and placed horizontally, the conductive member 6 is positioned at the second passage position by being restricted by the projection 411 of the third conductive layer 41.

Referring to fig. 10 to 14, in addition, the first conductive unit 2 includes a first internal wiring 22, the first inner wiring 22 extends toward one of the side surfaces of the ceramic body 1 along the corresponding ceramic green body 100, the outer electrode unit 5 is provided on the outer surface of the ceramic body 1, and includes a first external electrode 51 connected to the first internal wiring 22, two second external electrodes 52 connected to the second internal wirings 32, respectively, and two third external electrodes 53 connected to the third internal wirings 42, respectively, the second external electrode 52 and the third external electrode 53 extend from the bottom of the lower portion 12 to the top of the upper portion 13 along four sides of the ceramic body 1, respectively, and the second external electrodes 52 are opposite to each other, and the first external electrode 51 is positioned between one of the second external electrodes 52 and one of the third external electrodes 53.

Referring to fig. 15, the second internal circuit 32 and the third internal circuit 42 are respectively connected to the second external electrode 52 and the third external electrode 53, and the shapes of the second conductive layer 31 and the third conductive layer 41 are matched, so that the inductive switch can effectively detect the states of the ceramic body 1 before and after being inverted.

To sum up, the utility model discloses inductive switch utilizes ceramic body 1 by sintering behind the 100 stacks of pottery unburned bricks is made, and first electrically conductive unit 2 the electrically conductive unit of second 3 reaches the electrically conductive unit of third 4 by metal material set up in ceramic unburned bricks 100 are made, enable inductive switch integration and can effectively reduce the part to make whole volume break through the minimum volume restriction of the switch that has now made with plastics, and obtain more retrencied structure and littleer volume, can also obtain the leakproofness of preferred simultaneously, make first electrically conductive unit 2 the electrically conductive unit of second 3 the electrically conductive unit of third 4 is difficult for weing the damage, so can reach the purpose of the utility model.

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

Claims (10)

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

the ceramic body is formed by stacking and sintering a plurality of ceramic green compacts, and comprises a middle layer part defining a cavity, a lower layer part arranged at the bottom of the middle layer part and closing the bottom end of the cavity, and an upper layer part arranged at the top of the middle layer part and closing the top end of the cavity, wherein the middle layer part is provided with an inner surface adjacent to the cavity, the lower layer part is provided with a top surface adjacent to the cavity, and a blind hole formed in the top surface and opened towards the cavity;

the first conductive unit is made of metal materials arranged on the corresponding ceramic green bodies, and comprises a first conductive layer covering the inner surface of the middle layer part and at least one first internal circuit which is connected with the first conductive layer and extends to the outer side of the ceramic body;

the second conductive unit is made of metal materials arranged on the corresponding ceramic green bodies, and comprises a second conductive layer which is at least arranged on the blind hole and is concave, and at least one second internal circuit which is connected with the second conductive layer and extends outwards to the outer side of the ceramic body; and

the conductive piece can be located in the cavity in a rolling mode, the conductive piece can move between a first access position and a circuit breaking position, when the conductive piece is located at the first access position, the first conductive layer, the conductive piece and the second conductive layer form a current path, when the conductive piece is located at the circuit breaking position, the first conductive layer, the conductive piece and the second conductive layer do not form the current path, and when the ceramic body is horizontally placed in a mode that the lower layer portion, the middle layer portion and the upper layer portion are sequentially arranged from bottom to top, the conductive piece is limited by the second conductive layer and is located at the circuit breaking position.

2. The inductive switch of claim 1, wherein: the lower floor part of the ceramic body is also provided with an inner hole surface connected with the top surface and an end surface connected with the inner hole surface, the inner hole surface and the end surface define the blind hole, and the second conducting layer of the second conducting unit covers the inner hole surface and the top surface of the lower floor part.

3. The inductive switch of claim 2, wherein: the inner hole surface of the lower layer part of the ceramic body forms an included angle with the top surface, and the included angle is an obtuse angle.

4. The inductive switch of claim 1, wherein: the second conducting layer of the second conducting unit is stacked in the blind hole and provided with a top surface used for contacting the conducting piece, and the top surface of the second conducting layer is arc-shaped and is sunken towards the direction far away from the cavity.

5. The inductive switch of claim 1, wherein: the blind hole of the lower floor part of the ceramic body is also provided with an open end and a closed end, the second conducting layer of the second conducting unit extends to the closed end of the blind hole, and the second internal circuit is connected with the closed end and extends outwards.

6. The inductive switch of claim 5, wherein: the first internal circuit of the first conductive unit extends between the middle layer part and the lower layer part of the ceramic body or between the middle layer part and the upper layer part.

7. The inductive switch of claim 1, wherein: the conductive piece is spherical or cylindrical, the radius of the conductive piece is r, the lower layer part, the middle layer part and the upper layer part of the ceramic body are stacked along one axis, the maximum rolling distance of the conductive piece in the cavity, which is perpendicular to the axis, is d, and 3r < d <4 r.

8. The inductive switch of claim 1, wherein: the upper layer part of the ceramic body is provided with a bottom surface, a blind hole which is formed on the bottom surface and is open towards the cavity, the induction switch also comprises a third conductive unit, the third conductive unit is made of metal materials and is arranged on a corresponding ceramic green body, the third conductive unit comprises a third conductive layer which is at least arranged on the blind hole of the upper layer part and is concave upwards, and at least one third internal circuit which is connected with the third conductive layer and extends outwards to the outer side of the ceramic body, the conductive piece can move among a second passage position, a first passage position and a circuit-breaking position, when the conductive piece is at the second passage position, the first conductive layer, the conductive piece and the third conductive layer form a current passage, and when the conductive piece is at the circuit-breaking position, the first conductive layer, the conductive piece, the second conductive layer and the third conductive layer do not form a current passage, when the ceramic body is inverted and horizontally placed, the conductive piece is limited by the third conductive layer to be positioned at the open circuit position.

9. The inductive switch of claim 1, wherein: the upper layer part of the ceramic body is provided with a bottom surface adjacent to the cavity, the inductive switch further comprises a third conductive unit, the third conductive unit is made of a metal material and arranged on a corresponding ceramic green body and comprises a third conductive layer arranged on the upper layer part and at least one third internal circuit which is connected with the third conductive layer and extends outwards to the outer side of the ceramic body, the third conductive layer is provided with a protruding part protruding out of the bottom surface of the upper layer part, the conductive piece can move among a second passage position, a first passage position and a circuit breaking position, when the conductive piece is at the second passage position, the first conductive layer, the conductive piece and the third conductive layer form a current passage, and when the conductive piece is at the circuit breaking position, the first conductive layer, the conductive piece, the second conductive layer and the third conductive layer do not form a current passage, when the ceramic body is turned upside down and horizontally placed, the conductive member is positioned at the second passage position by being restricted by the protruding portion of the third conductive layer.

10. The inductive switch of claim 1, wherein: the first conductive unit and the second conductive unit are made of metal materials, are processed by a screen plate, a steel plate or an ink-jet mode through conductive adhesive, or are alternately and alternately arranged on corresponding ceramic green bodies in an electroplating mode, a chemical plating mode and a sputtering mode, and then are jointly stacked and sintered.

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