CN111404532A - Novel passive proximity switch - Google Patents

Abstract

The invention discloses a novel passive proximity switch, which comprises a proximity switch tube body, wherein the proximity switch tube body is provided with a first tube body and a second tube body, a sealing seat is arranged between the first tube body and the second tube body, one end of the first tube body is processed into a closed end part, a switch assembly is arranged in an inner cavity of the first tube body, the switch assembly is provided with a connecting piece, the switch assembly comprises a contact seat, a ring seat, a shaft lever and magnetic blocks, wherein the contact seat and the magnetic blocks are respectively arranged on two sides of the ring seat, the ring seat is provided with a through hole and an inner concave hole, the shaft lever is provided with a sliding block, one end of the shaft lever extends to the through hole of the ring seat and extends out to be connected with the magnetic blocks, a stroke space is formed between the two, two ends of the shaft lever are connected with the contact seat and the sliding block, an elastic piece is arranged in the inner concave hole of the ring seat, one end of the elastic piece is arranged on the bottom wall of the inner concave hole, the other end of the elastic piece. The product has the advantages of stable performance, fast frequency response, long service life and strong anti-interference capability.

Description

Novel passive proximity switch

Technical Field

The invention relates to the technical field of switches, in particular to a novel passive proximity switch.

Background

The proximity switch is also called contactless proximity switch, and is an ideal electronic switching value sensor. When the metal detection body approaches to the induction area of the switch, the switch can send out an electric command rapidly without contact, pressure and spark, and accurately reflect the position and the stroke of the motion mechanism. It is widely used in machine tool, metallurgy, chemical industry, light textile and printing industries. The automatic control system can be used as the links of limiting, counting, positioning control, automatic protection and the like.

However, the existing proximity switch mainly comprises a mechanical switch and an active proximity switch, wherein (1) the mechanical switch needs to be contacted by an object when in use, namely, the object reaches a specified position, the proximity switch is arranged at the specified position, and the mechanical switch and the proximity switch are contacted through a contact point to provide a signal for the proximity switch; (2) active proximity switch, it adopts the power mode to connect, lets inside production magnetic field through circular telegram, when the foreign matter is close, the outer emergence change through electric current of proximity switch detects the object, and its is more loaded down with trivial details structurally, has the limitation in the use.

The present invention is an improvement in view of the above problems.

Disclosure of Invention

The invention provides a novel passive proximity switch, which solves the problems existing in the use process in the prior art.

The technical scheme of the invention is realized as follows:

the utility model provides a novel passive proximity switch, includes the proximity switch body, this proximity switch body has first body and second body, installs the seal receptacle between first body and the second body, and first body one end is processed into confined tip, and it forms the first body of canned type at the shutoff of seal receptacle, and the switch module is installed as the link to the second body, and the switch module has the connecting piece of stretching out the seal receptacle and arranging the second body in to the inner chamber of first body, and the connecting piece encapsulation is at the seal receptacle, its characterized in that: the switch assembly comprises a contact seat and a passive action assembly, the passive action assembly is used for detecting that an object passes through the contact seat and can be closed so that the object can generate a loop signal, the passive action assembly comprises a ring seat, a shaft rod and a magnetic block, the contact seat and the magnetic block are respectively arranged on two sides of the ring seat, the ring seat is provided with a through hole and an inner concave hole, the shaft rod is provided with a sliding block matched with the inner concave hole, one end of the shaft rod extends to the through hole of the ring seat and extends out to be connected with the magnetic block, the magnetic block is close to the end part of a first closed pipe body, a stroke space is formed between the magnetic block and the first closed pipe body, the other end of the shaft rod is connected with the contact seat, an elastic part is installed in the inner concave hole of the ring seat.

Preferably, a magnet sleeve is arranged at the connecting end of the shaft lever and the magnet.

Preferably, the sealing seat is arranged between the first pipe body and the second pipe body in a pouring manner.

Preferably, the sealing seat is molded with epoxy resin.

Preferably, the connecting piece is connected with a circuit board, the circuit board is provided with a wiring terminal, and the connecting piece adopts an electric wire.

As a preferred option, the pipe diameter of the first pipe body is smaller than that of the second pipe body, and the cross section of the joint between the first pipe body and the second pipe body is funnel-shaped.

Preferably, the second tube body is connected with an explosion-proof joint, the second tube body is provided with an opening end, a first threaded connection surface is arranged on the inner wall of the opening end, the explosion-proof joint is provided with a second threaded connection surface which is continuous with the threaded connection surface, and the first threaded connection surface and the second threaded connection surface are matched to form a threaded explosion-proof combination surface.

Preferably, a magnet is mounted at the open end of the second tube.

Preferably, the first threaded surface and/or the second threaded surface is coated with a rust-preventive layer.

Preferably, the ring seat is provided with a concave hole, a first magnet is embedded in the concave hole and is blocked by a nut, and the first magnet and the magnetic block are attracted in the magnetic direction.

In conclusion, the beneficial effects of the invention are as follows:

the passive structure is realized by adopting a passive action component without connecting a power supply, and the contact base is mainly driven by an internal magnetic block and pulled to be closed to generate a loop signal so as to realize control.

The position switch can be operated without mechanical direct contact with a moving part, and when an object approaches the sensing surface of the switch to the action distance, the switch can act without mechanical contact and any pressure application, so that an action instruction is provided for an external control element.

The product has the advantages of stable performance, fast frequency response, long service life, strong anti-interference capability, explosion resistance, water resistance, shock resistance and corrosion resistance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of the overall structure of a passive proximity switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1, the present embodiment discloses a novel passive proximity switch, which is suitable for detecting a magnetic object, and includes a proximity switch tube 1, the proximity switch tube includes a first tube and a second tube, the first tube and the second tube are integrally formed, a sealing seat 15 is installed between the first tube and the second tube, one end of the first tube is processed into a closed end, the first tube is sealed by the sealing seat to form a sealed first tube, the second tube is used as a connection end, a switch assembly is installed in an inner cavity of the first tube, the switch assembly includes a connection part extending out of the sealing seat and disposed in the second tube, the connection part is sealed in the sealing seat 15, the connection part 9 is a wire, the switch assembly includes a contact seat 8 and a passive motion assembly for detecting the object passing through the contact seat to close the contact seat so that the contact seat generates a loop signal, the passive motion assembly includes a ring seat 5, The contact base 8 and the magnetic block 2 are respectively arranged on two sides of the ring base 5, the ring base 5 is provided with a through hole and an inner concave hole, the shaft rod is provided with a sliding block matched with the inner concave hole, one end of the shaft rod extends to the through hole of the ring base and extends out to be connected with the magnetic block, the magnetic block is close to the end portion of the first pipe body which is closed, a stroke space is formed between the shaft rod and the sliding block, the other end of the shaft rod is connected with the contact base, the elastic piece 6 is installed in the inner concave hole of the ring base, the elastic piece 6 adopts a spring, one end of the elastic piece is installed on the bottom wall of the inner concave hole, the other end of the elastic. The connecting piece 9 be connected with circuit board 10, install binding post 11 on the circuit board, binding post is as outer link.

The product of this scheme design, when the object is close to the tip of first body, magnetic object generally adopts the magnetic metal material, magnetic path 2 that is located the tip of first body senses, can be to the motion of first body diapire direction, because magnetic path 2 is connected at the axostylus axostyle, participate in figure 1 when the magnetic path moves left, can drive the motion of axostylus axostyle 7, can realize the control to the contact seat, then reach the circuit board to the instruction of action, realize the control to components and parts through the controller of being connected with the circuit board again, leave or keep away from the back when the detection thing, the magnetic path of this scheme can reset fast, the scheme of realization is: the ring seat 5 is provided with an inner concave hole, the inner concave hole is matched with a sliding block and a spring, the spring mainly adopts spring steel, when an object is detected on the ring seat, the spring is in a compressed state, the object leaves the ring seat and can restore to the original state, namely the sliding block is driven to move reversely (namely the direction of the right side in the figure), the sliding block and the shaft rod are integrated, the shaft rod can also be driven to move, and the shaft rod drives the magnetic block connected to the end part.

In order to further improve the reliability of the product, a magnet sleeve 3 is arranged at the connecting end of the shaft lever and the magnet block. Preferably, the sealing seat 15 is provided between the first tubular body and the second tubular body by means of a casting type.

In order to improve the sealing performance of the product, the sealing seat is sealed by epoxy resin, the pipe diameter of the first pipe body is smaller than that of the second pipe body, and the cross section of the joint between the first pipe body and the second pipe body is funnel-shaped. Ensuring the delicacy of the product and having smaller volume.

In order to ensure the reliability of connection, the second pipe body is connected with an explosion-proof joint 14, the second pipe body is provided with a cover body 12, the cover body 12 is provided with an opening end, a first threaded connection surface is arranged on the inner wall of the opening end, the explosion-proof joint is provided with a second threaded connection surface which is continuous with the threaded connection surface, and the first threaded connection surface and the second threaded connection surface are matched to form a threaded explosion-proof joint surface 17. A magnet 13 is mounted at the open end of the second tube. The service life of the product can be prolonged, the first threaded connection surface and/or the second threaded connection surface are/is coated with an anti-rust layer, and the anti-rust layer adopts 204-1 anti-rust oil.

The ring seat is opened there is the shrinkage pool is embedded to have first magnet 18 and through 4 shutoff of nut, this first magnet with the magnetism direction of magnetic path is for inhaling mutually, under the normal condition promptly (do not have the object to be close to under the condition), first magnet 18 and magnet have a less looks of inhaling the state, and the reunion spring can further guarantee contact seat closed condition, and is not expert promptly, and when the object process, the magnetic path can be to the tip operation, breaks away from and inhales the state mutually with first magnet, makes the contact seat joint then.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides a novel passive proximity switch, includes the proximity switch body, this proximity switch body has first body and second body, installs the seal receptacle between first body and the second body, and first body one end is processed into confined tip, and it forms the first body of canned type at the shutoff of seal receptacle, and the switch module is installed as the link to the second body, and the switch module has the connecting piece of stretching out the seal receptacle and arranging the second body in to the inner chamber of first body, and the connecting piece encapsulation is at the seal receptacle, its characterized in that: the switch assembly comprises a contact seat and a passive action assembly, the passive action assembly is used for detecting that an object passes through the contact seat and can be closed so that the object can generate a loop signal, the passive action assembly comprises a ring seat, a shaft rod and a magnetic block, the contact seat and the magnetic block are respectively arranged on two sides of the ring seat, the ring seat is provided with a through hole and an inner concave hole, the shaft rod is provided with a sliding block matched with the inner concave hole, one end of the shaft rod extends to the through hole of the ring seat and extends out to be connected with the magnetic block, the magnetic block is close to the end part of a first closed pipe body, a stroke space is formed between the magnetic block and the first closed pipe body, the other end of the shaft rod is connected with the contact seat, an elastic part is installed in the inner concave hole of the ring seat.

2. A novel passive proximity switch according to claim 1, wherein: and a magnet sleeve is arranged at the connecting end of the shaft lever and the magnet.

3. A novel passive proximity switch according to claim 1, wherein: the sealing seat is arranged between the first pipe body and the second pipe body in a pouring and sealing mode.

4. A novel passive proximity switch according to claim 3, wherein: the sealing seat is sealed by epoxy resin.

5. A novel passive proximity switch according to claim 1, wherein: the connecting piece be connected with the circuit board, install binding post on the circuit board, the connecting piece adopts the electric wire.

6. A novel passive proximity switch according to claim 1, wherein: the pipe diameter of first body be less than the pipe diameter of second body, the junction transversal personally submits hourglass hopper-shaped between first body and the second body.

7. A novel passive proximity switch according to claim 1, wherein: the second pipe body is connected with an explosion-proof connector, the second pipe body is provided with an opening end, a first threaded connection surface is arranged on the inner wall of the opening end, the explosion-proof connector is provided with a second threaded connection surface which is continuous with the threaded connection surface, and the first threaded connection surface and the second threaded connection surface are matched to form a threaded explosion-proof combination surface.

8. A novel passive proximity switch according to claim 7, wherein: the open end of the second tube body is provided with a magnet.

9. A novel passive proximity switch according to claim 7 or 8, wherein: the first threaded connection surface and/or the second threaded connection surface is coated with a rust preventive layer.

10. A novel passive proximity switch according to claim 1, wherein: the ring seat is provided with a concave hole, a first magnet is embedded in the concave hole and is blocked by a nut, and the first magnet and the magnetic block are attracted in the magnetic direction.

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