TWM479364U - Limit switch and linear actuator having the same - Google Patents

Description

Limit switch and linear actuator having the same

This creation is about a limit switch, especially a limit switch for linear actuators.

Linear Actuator is now widely used in medical equipment or equipment such as hospital beds, electric chairs, or other fields where stretching and contraction operations are required.

At present, a linear actuator mainly includes a driving element, a transmission, a telescopic tube and two limit switches. When the telescopic tube advances and touches one of the limit switches, the forward of the drive element is de-energized, so that the telescopic tube can only move backwards; further, when the telescopic tube retreats and touches to the other limit switch, the drive element is retracted. Electric, so that the telescopic tube can only move forward. Accordingly, the operation of the telescopic tube (forward or backward) can control the power supply through the two limit switches, thereby controlling the forward or backward movement of the extension tube.

Please refer to the first figure, which shows a schematic diagram of the setting of the limit switch of the current linear actuator. The limit switch 1a in the linear actuator is disposed on a support plate 2a. Further, the support plate 2a is further provided with a diode 3a element and a wire 4a. The limit switch 1a uses the rectifying function of the diode 3a to allow only a current to pass through in a single direction and in a reverse direction. When assembled, the external pin 5a of the limit switch 1a passes through the support plate 2a, and finally, the diode 3a element and the wire 4a are electrically connected to the pin 5a of the limit switch 1a by manual welding. Accordingly, the signal of the limit switch 1a and the diode 3a is transmitted to the control unit through the wire 4a.

However, in the above configuration, the combination of the limit switch 1a and the diode 2a by manual welding is time consuming, laborious, and difficult to position, which is difficult in assembly work.

In view of this, in order to achieve the above objectives, the creator has devoted himself to researching and cooperating with the application of theory, and finally proposed a creation that is reasonable in design and effective in improving the above-mentioned defects.

One of the purposes of this creation is to provide a limit switch that eliminates the need to solder the diode to simplify the electrical conduction of the limit switch and facilitate process automation.

In order to achieve the above purpose, the present invention is a limit switch comprising an insulating housing, a pressing block, a pair of pins, an elastic guiding group and a diode. The insulating housing has an opening and a plurality of slots. The pressure block is disposed on the insulating housing and protrudes outside the opening. The pair of pins are disposed in the insulating housing and respectively pass through the slots. The elastic guiding group comprises an elastic element compressed by the pressing block and a guiding piece connecting the elastic element, and the two ends of the guiding piece respectively respectively guide the pair of pins. The diode body is disposed in the insulating housing, the diode has two guiding legs, and the two-lead insulating housing is respectively connected to the pair of pins.

One of the aims of the present invention is to provide a linear actuator with a limit switch, which eliminates the mutual welding between the diode and the limit switch, thereby simplifying the electrical conduction process of the limit switch and facilitating process automation.

To achieve the above objectives, the present invention is a linear actuator having a limit switch including a housing, a transmission, and at least one limit switch. The transmission is placed inside the casing. The limit switch is disposed in the casing, and the limit switch is actuated by the actuation of the transmission device. The limit switch comprises an insulating housing, a pressing block, a pair of pins, an elastic guiding group and a diode. The insulating housing has an opening and a plurality of slots. The clamp is placed in insulation The housing is exposed outside the opening. The pair of pins are disposed in the insulating housing and respectively pass through the slots. The elastic guiding group comprises an elastic element compressed by the pressing block and a guiding piece connecting the elastic element, and the two ends of the guiding piece respectively respectively guide the pair of pins. The diode body is disposed in the insulating housing, the diode has two guiding legs, and the two-lead insulating housing is respectively connected to the pair of pins.

Compared with the prior art, the linear actuator of the present invention is controlled by a diode and a limit switch for power control. The internal limit of the limit switch of this creation is provided with a diode, so that the diode is not welded to the external pin of the limit switch, and the welding process of the conventional limit switch and the diode is omitted to simplify the assembly. Working hours and manpower are conducive to the implementation of automated processes, increasing the practicality and convenience of this creation.

1a‧‧‧linear actuator

2a‧‧‧Support plate

3a‧‧‧dipole

4a‧‧‧Wire

5a‧‧‧ pins

1, 1'‧‧‧ limit switch

2, 2'‧‧‧ linear actuator

10‧‧‧Insulated housing

100‧‧‧First accommodation space

101‧‧‧Second accommodation space

102‧‧‧Insert

11‧‧‧ openings

12‧‧‧ slotting

20‧‧‧Clamps

30‧‧‧ pins

40‧‧‧Flexible Conducting Group

41‧‧‧Flexible components

42‧‧‧guides

50‧‧‧ diode

51‧‧‧ lead

60, 60' ‧ ‧ housing

61‧‧‧Shell

61’‧‧‧First housing

62‧‧‧External management

62'‧‧‧ second housing

63'‧‧‧Waterproof strip

700, 700'‧‧‧ transmission

70, 70’ ‧ ‧ Actuation agencies

71‧‧‧Motor

72‧‧‧Transmission group

721‧‧‧First touch

80, 80'‧‧‧ telescopic tube

81‧‧‧Second touch

90‧‧‧Support board

91‧‧‧Wire

The first figure is a schematic diagram of the setting of the limit switch of the conventional linear actuator; the second picture is a combination diagram of the limit switch of the present creation; the third picture is the exploded view of the limit switch of the present creation; the fourth picture is the creation of the limit switch; A sectional view of the limit switch; the fifth diagram is a schematic diagram of the setting of the limit switch of the present creation; the sixth figure is the linear actuator with the limit switch of the present creation; the seventh figure is the linear actuation of the limit switch with the present creation Schematic diagram of the application.

The eighth figure is another schematic diagram of the application of the linear actuator with limit switches of the present invention.

The ninth diagram is the second implementation of the housing of the linear actuator with limit switches of the present invention. example.

The detailed description and technical content of the present invention are described below with reference to the drawings, but the drawings are only for reference and explanation, and are not intended to limit the creation.

Please refer to the second to fourth figures, which are respectively a combination diagram, an exploded view and a combined sectional view of the limit switch of the present invention. The limit switch 1 of the present invention comprises an insulating housing 10, a pressing block 20, a pair of pins 30, an elastic guiding group 40 and a diode 50. The pressure block 20 is mounted on the insulating housing 10, and the elastic guiding group 40 and the diode 50 are disposed in the insulating housing 10, and the butting pins 30 are respectively inserted from the butting pins 30. To provide an electrical connection.

The insulating housing 10 is made of an insulating material such as plastic. The insulating housing 10 has a first receiving space 100, an opening 11 and a plurality of slots 12, and the opening 11 and the slots 12 communicate with the first receiving space 100. In the embodiment, the insulating housing 10 is formed with a second accommodating space 101 in the first accommodating space 100, and is formed with the first accommodating space 100 and the second accommodating space 101. Two slits 102.

The pressing block 20 is disposed on a top surface of the insulating housing 10, and the pressing block 20 abuts against the opening 11 and protrudes from the opening 11 to partially protrude outside the opening 11. Moreover, the pair of pins 30 are disposed in the accommodating space 100 and respectively pass through the slots 12 to provide electrical connection with other electronic components.

The elastic guiding group 40 includes an elastic member 41 pressed by the pressing block 20 and a guiding piece 42 connecting the elastic member 41. The elastic member 41 can be a spring, and the elastic member 41 elastically abuts the pressing block 20. One end of the elastic member 41 is fixed to one of the pins of the pair of pins 30, and the other end is fixed to the guiding piece 42. The guide piece 42 The two ends of the two ends respectively correspond to the butting pins 30. In this embodiment, one end of the elastic member 41 is fixed on one of the pins of the pair of pins 30, and the other end is fixed on the guiding piece 42.

Furthermore, the diode 50 is disposed in the insulating housing 10. The diode 50 has two lead pins 51 respectively connected to the mating pins 30 in the insulating housing 10. The two lead pins 51 are respectively disposed on the two slots 102 and electrically connected to the pair of pins 30 to position the diode 50 in the second receiving space 101.

When the limit switch 1 is used, one end of the guiding piece 42 is connected to one of the pins of the pair of pins 30, and the other end is connected to the other pin. At this time, the limit switch 1 is kept in conduction. status. When the pressing block 20 is pushed by an external force, the pressing block 20 moves downward and presses the elastic member 41, and the elastic member 41 then drives the guiding piece 42 away from the other pin. The limit switch 1 is kept in a non-conducting state.

Please refer to the fifth and sixth figures for the setting of the limit switch of this creation and the linear actuator with limit switch. The limit switch 1 of the present invention can be applied to a linear actuator 2 for controlling the advancement and retreat of the linear actuator 2. The linear actuator 2 includes a housing 60, a transmission 700 and at least one limit switch 1, and in this embodiment, two limit switches 1, 1' are included. The structure of the two limit switches 1, 1' is as described above, and will not be described herein. The two limit switches 1, 1' are disposed in the casing 60 and are actuated by the actuation of the transmission 700.

The casing 60 can be made of a plastic material. The casing 60 includes a casing 61 and an outer tube 62 coupled to the front of the casing 61. The casing 61 and the outer pipe 62 can be integrally formed. In this embodiment, the transmission device 700 includes an actuating mechanism 70 and a telescopic tube 80. . The actuating mechanism 70 is disposed in a housing 61 of the housing 60. The actuation mechanism 70 includes a motor 71 and a transmission set 72 driven by the motor 71. The telescoping tube 80 is driven by the transmission set 72 to extend or retract the housing 60.

In the embodiment, the linear actuator 2 further includes a support plate 90 and a wire 91 (please refer to the fourth figure). The two limit switches 1 and 1 are disposed on one side of the support plate 90. The wires 91 are disposed on the other side of the support plate and electrically connected to the pair of pins 30. Further, the two limit switches 1, 1' are spaced apart from the support plate 90.

Referring to the seventh figure, the application diagram of the casing of the linear actuator of the present invention is shown. In the embodiment, the two limit switches 1, 1' are actuated by the actuation of the transmission group 72, and the transmission group 72 has A first touch member 721. Thereby, when the transmission group 72 is advanced, the first touch member 721 will touch one of the limit switches 1, and at this time, the forward movement of the actuating mechanism 70 is turned off; on the other hand, when the transmission group 72 is retracted, the first touch member When the 721 is touched to the other limit switch 1', the actuation mechanism 70 is powered off. Accordingly, the operation of the transmission group 72 can control the power supply through the two limit switches 1, 1'.

Referring to FIG. 8 again, another application schematic diagram of the linear actuator of the present invention is shown; this embodiment is substantially the same as the embodiment of the seventh embodiment, except that the two limit switches 1, 1' are subjected to the same. The telescopic tube 80 is actuated by a touch, and the telescopic tube 80 has a second actuator 81. Similarly, when the telescopic tube 80 is advanced, the second actuator 81 will touch one of the limit switches 1 at this time, that is, the forward movement of the actuation mechanism 70 is turned off; on the other hand, when the extension tube 80 is retracted, the second actuator When the 81 is touched to the other limit switch 1', the actuation mechanism 70 is powered off.

Please refer to the ninth figure for another embodiment of the casing of the linear actuator of the present invention. The embodiment is substantially the same as the previous embodiment. The linear actuator 2' includes a casing 60', a transmission device 700' (including an actuating mechanism 70' and a telescopic tube 80') and two limit switches 1 ,1'. The difference between this embodiment and the previous embodiment lies in the embodiment of the casing 60'. In this embodiment, the casing 60' includes a first casing 61' and a second casing 62' which are oppositely covered. Preferably, the casing 60' further includes a waterproof rubber strip 63' disposed at a junction of the first casing 61' and the second casing 62' to provide the machine. The sealing of the shell 60'.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the patents of the present invention. Other equivalent variations of the patent spirit using the present invention are all within the scope of the patent.

10‧‧‧Insulated housing

100‧‧‧First accommodation space

101‧‧‧Second accommodation space

102‧‧‧Insert

11‧‧‧ openings

12‧‧‧ slotting

20‧‧‧Clamps

30‧‧‧ pins

40‧‧‧Flexible Conducting Group

41‧‧‧Flexible components

42‧‧‧guides

50‧‧‧ diode

51‧‧‧ lead

90‧‧‧Support board

91‧‧‧Wire

Claims (20)

A limit switch includes: an insulating housing having an opening and a plurality of slots; a pressing block disposed on the insulating housing and protruding outside the opening; a pair of pins disposed in the insulating housing And the elastic guiding member includes an elastic member pressed by the pressing block and a guiding piece connected to the elastic member, and the two ends of the guiding piece respectively guide the docking And a diode disposed in the insulating housing, the diode has two guiding legs, and the two guiding legs respectively connect the pair of pins in the insulating housing. The limit switch of claim 1, wherein the insulating housing has a first receiving space, and the opening and the slots communicate with the first receiving space. The limit switch of claim 2, wherein the insulating housing is formed in the first accommodating space to form a second accommodating space, and the two-pole system is positioned in the second accommodating space. The limit switch of claim 3, wherein the insulating housing is formed with two slits connecting the first accommodating space and the second accommodating space, and the two guiding legs are respectively disposed on the two slits. And electrically connecting the pair of pins. The limit switch of claim 1, wherein the elastic element is a spring, one end of the spring is fixed on one of the pins of the pair of pins, and the other end is fixed on the guiding piece. A linear actuator having a limit switch, comprising: a casing; a transmission device disposed in the casing; and at least one limit switch disposed in the casing, the limit switch being actuated by the actuation of the transmission device, the limit switch comprising: an insulation housing having an opening a plurality of slots; a pressing block disposed on the insulating housing and protruding outside the opening; a pair of pins disposed in the insulating housing and respectively passing through the slots; an elastic guiding group, An elastic member pressed by the pressing block and a guiding piece connected to the elastic member, the two ends of the guiding piece respectively correspondingly guiding the pair of pins; and a diode disposed in the insulating housing The diode has two guiding legs, and the two guiding legs respectively connect the pair of pins in the insulating housing. A linear actuator having a limit switch according to claim 6, wherein the transmission device comprises an actuating mechanism, the actuating mechanism comprising a motor and a drive group driven by the motor, the drive set triggering the limit switch Actuate. A linear actuator having a limit switch according to claim 6, wherein the transmission further comprises a telescopic tube that is driven by the transmission group to extend or retract to the casing. A linear actuator having a limit switch as claimed in claim 8, wherein the telescoping tube is actuated by the limit switch. A linear actuator having a limit switch according to claim 6, further comprising a support plate and a wire, the limit opening relationship being disposed on one side of the support plate, the wire being disposed on the support plate The pair of pins are connected to the side and electrically. A linear actuator having a limit switch as claimed in claim 10, wherein the limit opening relationship is provided on the support plate. The linear actuator with a limit switch according to claim 6, wherein the insulating housing has a first accommodating space, and the opening and the slots communicate with the first accommodating space. The linear actuator with a limit switch according to claim 12, wherein the insulating housing is configured to form a second accommodating space in the first accommodating space, and the second locating space is positioned in the second accommodating space. body. The linear actuator with a limit switch according to claim 13, wherein the insulating housing is formed with two slits connecting the first accommodating space and the second accommodating space, and the two guiding legs are respectively worn The two slots are placed and electrically connected to the pair of pins. A linear actuator having a limit switch according to claim 6, wherein one end of the elastic member is fixed to one of the pins of the pair of pins, and the other end is fixed to the guide piece. A linear actuator having a limit switch according to claim 6, wherein the casing comprises a housing and an outer tube coupled to the front of the housing. A linear actuator having a limit switch according to claim 16, wherein the housing and the outer tube are integrally formed. A linear actuator having a limit switch according to claim 6, wherein the casing comprises a first casing and a second casing that are oppositely fitted. A linear actuator having a limit switch according to claim 18, wherein the casing further comprises a waterproof rubber strip disposed at a junction of the first casing and the second casing. A linear actuator having a limit switch according to claim 6, wherein the casing is made of a plastic material.