阅读说明：本技术 常开式感应开关 (Normally open type inductive switch ) 是由 周添铭 于 2020-06-05 设计创作，主要内容包括：一种常开式感应开关,包含绝缘壳体、两个导电端子,及两个导电滚珠。所述绝缘壳体界定出沿一条轴线朝两端开放的设置孔。所述导电端子穿入且封闭所述设置孔的两端,且沿所述轴线相间隔,每一个导电端子包括绕所述轴线的内周面,及连接所述内周面的内端面,所述内周面及所述内端面共同界定朝另一个导电端子开放的容置空间,所述内周面具有呈环沟状的环沟段。所述导电滚珠能移动地容置于所述内端面之间。所述感应开关能受外力在开路状态及闭路状态之间切换,当所述绝缘壳体以所述轴线呈水平静止时,所述导电滚珠分别定位于所述导电端子的环沟段且彼此分离,使所述感应开关能于常态水平静止状态下呈开路状态,且结构精简。(A normally open inductive switch includes an insulating housing, two conductive terminals, and two conductive balls. The insulating housing defines a mounting hole open to both ends along an axis. The conductive terminals penetrate into and seal two ends of the setting hole and are spaced along the axis, each conductive terminal comprises an inner peripheral surface surrounding the axis and an inner end surface connected with the inner peripheral surface, the inner peripheral surface and the inner end surface jointly define an accommodating space which is open towards the other conductive terminal, and the inner peripheral surface is provided with an annular groove section in an annular groove shape. The conductive ball is movably accommodated between the inner end faces. The inductive switch can be switched between an open circuit state and a closed circuit state by external force, when the insulating shell is horizontally static by the axis, the conductive balls are respectively positioned on the ring groove sections of the conductive terminals and are separated from each other, so that the inductive switch can be in the open circuit state in the normal horizontal static state, and the structure is simple.)

1. A normally open inductive switch, characterized in that: comprises the following steps:

the insulating shell comprises two mounting ends opposite along an axis, an extension section connected with the mounting ends, and an inner hole surface extending from the mounting ends and the extension section and defining a setting hole around the axis, wherein the setting hole penetrates through the mounting ends;

the two conductive terminals penetrate through the mounting end and close the arrangement hole respectively, the conductive terminals are spaced along the axis, each conductive terminal comprises an inner peripheral surface surrounding the axis and an inner end surface passing through the axis and connected with the inner peripheral surface, the inner peripheral surface and the inner end surface jointly define an accommodating space which is open towards the other conductive terminal, and the inner peripheral surface is provided with a circular groove section which is circular groove-shaped surrounding the axis; and

the normally open type induction switch can be switched between an open circuit state and a closed circuit state under the action of external force, a current path is not formed between the conductive balls and the conductive terminals in the open circuit state, the conductive balls are in contact and respectively contact with the conductive terminals to form the current path in the closed circuit state, and when the insulating shell is horizontally static along the axis, the conductive balls are respectively positioned at the annular groove sections of the conductive terminals and are separated from each other, so that the normally open type induction switch is in the open circuit state.

2. The normally open inductive switch of claim 1, wherein: the inner peripheral surface of each conductive terminal is also provided with a roll-out section which is connected with the annular groove section and is close to the other conductive terminal, the roll-out section gradually approaches to the axis from one side of the adjacent annular groove section to one side far away from the annular groove section, when the insulating shell is inclined, one conductive ball rolls to the corresponding roll-out section and can push against the other conductive ball, so that the other conductive ball is abutted against the inner end surface of the other conductive terminal.

3. The normally open inductive switch of claim 2, wherein: the rolling-out section of each conductive terminal is in an oblique straight line along the section contour of the axis.

4. The normally open inductive switch of claim 2, wherein: the roll-out section of each conductive terminal is smoothly connected with the annular groove section.

5. The normally open inductive switch of claim 2, wherein: the inclination angle of the roll-out section of each conductive terminal relative to the axis is between 3 degrees and 65 degrees.

6. The normally open inductive switch of claim 1, wherein: the inner circumferential surface of each conductive terminal is also provided with a receding section which is connected with the annular groove section and the inner end surface of each conductive terminal, and the receding section gradually approaches the axis from one side of the adjacent annular groove section to one side far away from the annular groove section.

7. The normally open inductive switch of claim 6, wherein: the receding section of each conductive terminal is in an oblique straight line along the section outline of the axis.

8. The normally open inductive switch of claim 6, wherein: the receding section of each conductive terminal is smoothly connected with the annular groove section.

9. The normally open inductive switch of claim 1, wherein: the inner end surface of each conductive terminal is recessed towards the direction far away from the other conductive terminal.

Technical Field

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

Background

Referring to fig. 1, a conventional ball switch disclosed in taiwan patent No. I321798 is a normally closed ball switch, and includes a hollow housing 91 with two open ends, two metal terminals 92 respectively closing the two ends of the housing 91 and spaced apart from each other, and two balls 93 accommodated in the housing 91. Under normal state, when the housing 91 is at rest, the balls 93 abut against and respectively contact the metal terminals 92, so that the balls 93 are switched to a closed state, and when the housing 91 is vibrated, the balls 93 bounce and separate, so that the balls are switched to an open state, thereby achieving an induction effect.

The ball switch has good and sharp switching action, but the ball switch cannot be applied to products which need to be in a normally open state according to the requirements of different products.

Disclosure of Invention

The invention aims to provide a normally open type inductive switch with a simple structure.

The invention discloses a normally open type inductive switch, which comprises an insulating shell, two conductive terminals and two conductive balls. Insulating casing includes two along the opposite installation end of an axis, connects the extension of installation end, and extend in the installation end reaches the extension just winds the axis defines the inner bore face that sets up the hole, set up the hole and run through the installation end. The conductive terminals penetrate through the mounting ends and close the arrangement holes respectively, the conductive terminals are spaced along the axis, each conductive terminal comprises an inner peripheral surface surrounding the axis and an inner end surface passing through the axis and connected with the inner peripheral surface, the inner peripheral surface and the inner end surface jointly define an accommodating space which is open towards the other conductive terminal, and the inner peripheral surface is provided with an annular groove section which is annular groove-shaped surrounding the axis. The conductive balls are movably accommodated between the inner end surfaces of the conductive terminals, the normally open type induction switch can be switched between an open circuit state and a closed circuit state under the action of external force, no current path is formed between the conductive balls and the conductive terminals in the open circuit state, the conductive balls are contacted and respectively contacted with the conductive terminals to form current paths in the closed circuit state, and when the insulating shell is horizontally static by the axis, the conductive balls are respectively positioned at the ring groove sections of the conductive terminals and are separated from each other, so that the normally open type induction switch is in the open circuit state.

The normally open inductive switch of the invention is characterized in that the inner peripheral surface of each conductive terminal is also provided with a roll-out section which is connected with the annular groove section and is close to the other conductive terminal, the roll-out section gradually approaches to the axis from one side adjacent to the annular groove section to one side far away from the annular groove section, when the insulating shell is inclined, one of the conductive balls rolls to the corresponding roll-out section and can push against the other conductive ball, so that the other conductive ball is abutted against the inner end surface of the other conductive terminal.

According to the normally open type induction switch, the rolling-out section of each conductive terminal is in an oblique straight line along the section contour of the axis.

The rolling-out section of each conductive terminal of the normally open inductive switch is smoothly connected with the annular groove section.

In the normally open inductive switch, the inclination angle of the roll-out section of each conductive terminal relative to the axis is between 3 and 65 degrees.

In the normally open inductive switch, the inner peripheral surface of each conductive terminal is also provided with a receding section connected with the annular groove section and the inner end surface of each conductive terminal, and the receding section gradually approaches the axis from one side of the adjacent annular groove section to one side far away from the annular groove section.

According to the normally open inductive switch, the section contour of the backward section of each conductive terminal along the axis is in an oblique straight line.

The normally open inductive switch of the invention has the back section of each conductive terminal smoothly connected with the annular groove section.

In the normally open inductive switch of the present invention, the inner end surface of each conductive terminal is recessed towards the direction far away from the other conductive terminal.

The invention has the beneficial effects that: when the annular groove section of the conductive terminal is used for being horizontally static in the insulating shell, the conductive ball is positioned and separated, so that the normally open type inductive switch is kept in an open circuit state in a normal state, and the whole structure is simplified.

Drawings

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

FIG. 1 is a cross-sectional view of a prior art ball switch;

fig. 2 is a perspective cross-sectional view of one embodiment of the normally open inductive switch of the present invention, illustrating the normally open inductive switch in an open state;

FIG. 3 is a plan sectional view of the embodiment;

FIG. 4 is a plan cross-sectional view of one of the conductive terminals and one of the conductive balls of the embodiment; and

fig. 5 is a perspective cross-sectional view of one embodiment of the normally open type inductive switch of the present invention, illustrating the normally open type inductive switch in a closed state.

Detailed Description

Referring to fig. 2, 3 and 4, an embodiment of the normally open inductive switch of the present invention includes an insulating housing 1, two conductive terminals 2, and two conductive balls 3.

Insulating housing 1 includes two along the opposite installation end 11 of an axis L, one connects the extending section 12 of installation end 11, and one extend installation end 11 reaches extending section 12 just centers on axis L and defines an interior hole face 14 of setting hole 13, setting hole 13 runs through installation end 11. In the embodiment, the insulating housing 1 is made of a metal material and the surface thereof is covered with an insulating layer, for example, a plastic film, but in other variations, the insulating housing 1 may be made of an insulating material directly.

The conductive terminals 2 are respectively penetrated and sealed by the mounting ends 11 to the setting holes 13, and the conductive terminals 2 are spaced along the axis L. In this embodiment, the conductive terminals 2 are fixed to the setting holes 13 in a tight fit manner, but not limited thereto.

Each conductive terminal 2 includes an inner peripheral surface 22 around the axis L, and an inner end surface 23 passing through the axis L and connected to the inner peripheral surface 22. The inner peripheral surface 22 and the inner end surface 23 together define an accommodating space 21 which is open towards the other conductive terminal 2, and the inner peripheral surface 22 has a ring groove section 221 which is ring groove-shaped around the axis L, a roll-out section 222 which is connected with the ring groove section 221 and is close to the other conductive terminal 2, and a back-off section 223 which is connected with the ring groove section 221 and the respective inner end surface 23. The roll-out section 222 gradually approaches the axis L from a side adjacent to the annular groove section 221 to a side away from the annular groove section 221, and an inclination angle θ of the roll-out section 222 with respect to the axis L is between 3 ° and 65 °. The receding section 223 gradually approaches the axis L from a side adjacent to the annular groove section 221 to a side away from the annular groove section 221, and in this embodiment, the receding section 223 is an oblique straight line along a cross-sectional profile of the axis L and is smoothly connected to the annular groove section 221. The inner end surface 23 is recessed in a direction away from the other conductive terminal 2 and is conical.

Referring to fig. 3 and 4, the conductive balls 3 are movably accommodated between the inner end surfaces 23 of the conductive terminals 2.

Referring to fig. 3 and 5, the normally open type inductive switch can be switched between an open state (see fig. 3) and a closed state (see fig. 5) by external force. When the insulating housing 1 is horizontally stationary about the axis L (see fig. 3), the conductive balls 3 are respectively located in the accommodating spaces 21 of the conductive terminals 2 and respectively located in the annular groove sections 221 to be separated from each other, so that the normally open inductive switch is in an open state.

When the normally open inductive switch is in use, the conductive terminal 2 is used for being connected with an external circuit (not shown), and when the insulating housing 1 is in a horizontal rest state with the axis L in a normal state, the conductive balls 3 are respectively positioned by the annular groove sections 221 of the conductive terminal 2 and separated from each other, so that the normally open inductive switch is in the open state. When the insulating housing 1 vibrates or tilts to make the conductive balls 3 contact and respectively contact the conductive terminals 2 (not limited to the contact state in fig. 5), a current path is formed between the conductive balls 3 and the conductive terminals 2, so that the normally open inductive switch is in a closed state. Furthermore, when the insulating housing 1 is tilted (see fig. 5), one of the conductive balls 3 rolls to the respective roll-out section 222 and pushes against the other conductive ball 3 until the other conductive ball 3 rolls to the respective roll-back section 223 and abuts against the respective inner end surface 23.

It should be noted that, in the present embodiment, as long as the conductive balls 3 are separated and at least one conductive ball 3 is separated from the corresponding conductive terminal 2 due to vibration, no current path is formed between the conductive ball 3 and the conductive terminal 2, so that the normally open inductive switch is in the open state.

From the foregoing description, the advantages of the present embodiment are summarized as follows:

1. each conductive terminal 2 can position the conductive ball 3 and separate the conductive ball 3 when the insulating housing 1 is horizontally placed on the axis L by the annular groove section 221, so that the invention can be maintained in an open circuit state in a normal state.

2. By gradually approaching the axis L from the respective circular groove section 221 to the other conductive terminal 2 by the rolling-out section 222 of each conductive terminal 2 and making the inclination angle θ between 3 ° and 65 °, and smoothly connecting the circular groove section 221, the rolling-out section 222 and the receding section 223, each conductive ball 3 can easily roll up to contact with the other conductive ball 3 when the insulating housing 1 is inclined, and each conductive ball 3 can automatically return to the respective circular groove section 221 when the insulating housing 1 returns to the horizontal state, thereby obtaining better sensing sensitivity.

3. In addition, the receding section 223 of each conductive terminal 2 gradually approaches the axis L from the side adjacent to the annular groove section 221 to the side away from the annular groove section 221, so that the conductive ball 3 can be abutted when the insulating housing 1 tilts or vibrates, and a better sensing sensitivity can be maintained.

In summary, in the normally open inductive switch of the present invention, when the insulating housing 1 is horizontally stationary, the conductive balls 3 are positioned and separated from each other by the ring groove sections 221 of the conductive terminals 2, so that the normally open inductive switch is kept in an open state in a normal state, and has a simple structure, 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.