CN114552311A

CN114552311A - Safety frame with modular power switch

Info

Publication number: CN114552311A
Application number: CN202210091089.1A
Authority: CN
Inventors: 王贯民; 胡晓松
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-05-27
Anticipated expiration: 2042-01-26
Also published as: CN114552311B

Abstract

The invention relates to a safety rack with a module power switch, which comprises a case, a plurality of modules assembled in the case and a printed board fixed below a bottom plate of the case, wherein the printed board distributes power for a socket on the bottom plate of the case through a plurality of module power circuits distributed on the printed board; when the module is inserted, the push rod of the module switch is pushed by the module to compress the elastic restoring body to move to the closed position, and when the module is inserted in place, the module switch is in the closed state, and the corresponding module power circuits are communicated. According to the invention, before the module is inserted into the rack, the socket is not electrified, and after the module is inserted into the rack, the module switch push rod is pressed, so that the switch is closed to supply power to the module, and the hot plugging of the module is avoided.

Description

Safety frame with modular power switch

Technical Field

The invention belongs to the technical field of connectors, and particularly relates to a safety rack with a module power switch.

Background

The rack is widely applied as a modular connector, and the power supply distribution of the rack is connected to a main power switch of the rack by an external incoming line (+), an incoming line (-) and an internal lead wire on a back plate at the bottom of a chassis of the rack at present; and finally, distributing the power supply to the contact elements of all the sockets at the bottom of the chassis of the rack through the copper-clad printed wires in the back plate. The plug is installed at the end part of the module assembled in the chassis of the rack, and is connected with the socket in the chassis through the plug to supply power to each module.

However, the above power supply scheme has the following disadvantages: 1) hot plugging and discharge, arcing and possible safety accidents and damage to the contact. In the working process of the rack, once a main power switch is closed, all the + poles and the-poles of the sockets are electrified, the module is equivalent to electric equipment, if the switch of the module is in a closed state at the moment, in the inserting process, current is electrified to the module through the sockets and the plugs, the current is suddenly changed and suddenly appears, and the current is changed from 0 to the maximum, namely: when the plug-in connector is inserted in a live state, arc discharge is easily generated, and a contact is damaged. Similarly, in the process of pulling out the module, the current is changed from the maximum to 0, and arcing discharge is easily generated to damage the contact.

2) The contacts of the socket are electrically charged and may get electrocuted if touched by a finger. If metal foreign bodies short-circuit the + pole and the-pole, discharge and electric arc are easily generated, and fire is caused.

Disclosure of Invention

In order to solve the above problems, the present invention provides a safety rack with a modular power switch, in which a normally-closed switch or a switch-type connector is added to a positive pole circuit of a power circuit corresponding to each socket on a back plate, and a push rod of the normally-closed switch or the switch-type connector extends into a chassis, so that the normally-closed switch or the switch-type connector can be synchronously closed under the pushing of the module when the module is inserted, and can also be synchronously opened when the module is separated.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the invention, the safety rack with the module power switch comprises a case, a plurality of modules assembled in the case and a printed board fixed below a bottom plate of the case, wherein the printed board supplies power to sockets matched with the modules on the bottom plate of the case through a plurality of module power circuits distributed on the printed board; when the module is inserted, the push rod of the module switch is pushed by the module to compress the elastic restoring body to move to the closed position, and when the module is inserted in place, the module switch is in the closed state, and the corresponding module power circuits are communicated.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

The aforementioned security chassis having modular power switches connected to the + pole power circuit of a single modular power circuit.

The safety rack with the module power switch comprises a base, a push rod and a reset spring, wherein two binding posts are fixed on the base, two contacts are arranged on the push rod, the reset spring is fixed between the base and the push rod, and the tail parts of the two binding posts are connected to a + pole power circuit of the module power circuit.

In an embodiment of the safety rack with the module power switch, the module power switch is a switch-type connector, the switch-type connector includes a switch plug and a switch socket, the front end of the switch plug is plugged, the tail of the contact element in the switch plug is connected, the switch plug and the switch socket are kept in a disconnected state under the action of the elastic restoring body, and the push rod is located on the switch plug.

In the safety rack with the modular power switch, axial limiting is further achieved between the switch plug and the switch socket through matching of the clamping table and mining, so that the switch plug and the switch socket are prevented from being separated from each other under the action of the elastic restoring body, and the length of the clamping groove meets the requirement of relative movement of the switch plug and the switch socket during plugging.

The switch socket comprises a socket insulator and two contact pins fixed in the socket insulator, the socket insulator is further provided with at least two connecting pieces extending along the axial direction, the elastic reset bodies are located in the socket insulator and distributed along the connecting pieces, and the connecting pieces penetrate through positioning holes at the front end of the switch plug to fix the switch type connector on a bottom plate of the machine box.

The safety rack with the module power switch comprises a plug insulator at the front end and a push rod at the rear end, wherein two jacks communicated with the tail are arranged in the plug insulator, the push rod comprises an inserting part at the front end and a force application part at the rear end, the two positioning holes are symmetrically distributed on two sides of the inserting part, and the force application part can penetrate through the chassis base plate and extend into the chassis.

In the safety rack with the modular power switch, the periphery of the insertion part is provided with the clamping table, and the socket insulator is provided with the corresponding clamping groove.

In the safety rack with the modular power switch, the push rod and the plug insulator are connected and positioned through the matching of the clamping table and the clamping groove.

In the safety rack with the modular power switch, the portion of the tail of the contact pin extending out of the socket insulator extends axially along the socket insulator after being bent twice and is supported on the support table on the socket insulator, and the support table is further provided with a groove for preventing the contact pin from swinging.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:

the invention adds at least one single normally-closed switch or switch-type connector to the + pole circuit of a single module. This can be done with the + pole of the socket unpowered and the-pole powered before the module is plugged in. When the module is inserted, the module presses the push rod of the switch or the switch type connector to close the switch or contact the contact pin of the switch type connector with the jack, so that power is supplied to the module. Therefore, in the process of inserting the module, even if the switch of the module is in a closed state, the power circuit of the module can not be communicated, no current can be generated between the plug and the socket of the module, and arcing discharge and contact damage can not occur.

Drawings

FIG. 1 is a power distribution circuit diagram of a secure chassis having modular power switches in accordance with the present invention;

FIG. 2 is a schematic diagram of a modular switch of a safety chassis having a modular power switch according to embodiment 1 of the present invention;

fig. 3 is a schematic diagram of an off state of a module switch of a safety chassis with a module power switch according to embodiment 2 of the present invention;

fig. 4 is a schematic diagram of a closed state of a module switch of a safety chassis with a module power switch according to embodiment 2 of the present invention;

fig. 5 is an overall schematic view of a safety rack with a modular power switch according to embodiment 2 of the present invention;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a bottom view of FIG. 5;

FIG. 8 is a cross-sectional view of FIG. 5;

fig. 9 is a cross-sectional view of the safety chassis with a modular power switch of embodiment 2 of the present invention in the plugged-in state.

[ description of main element symbols ]

1: cabinet

2: module

3: base plate

4: printed board

5: power supply main switch

6: module switch

7: base seat

8: binding post

9: reset spring

10: contact point

11: push rod

12: socket insulator

13: pin insertion

14: connecting rod

15: elastic restoring body

16: push rod insulator

17: plug insulator

18: jack hole

19: conducting wire

20: card table

21: clamping groove

22: flat gasket

23: spring washer

24: locating hole

25: supporting table

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the safety rack with modular power switch according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 1-9, which are schematic structural views of parts of a safety rack with a module power switch according to the present invention, the rack includes a chassis 1 and a plurality of modules 2 assembled in the chassis, the ends of the modules 2 are provided with plugs, and a bottom plate 3 of the chassis 1 is provided with sockets adapted to the plugs of the modules 2. The printed board 4 used for being connected with each socket connector is further arranged below the bottom plate 3 of the case 1, the printed board 4 is connected with a power main switch 5 fixed on the case through an internal lead, and the power main switch 5 is connected with an external incoming line so as to introduce an external power supply.

The printed board 4 distributes the power introduced by the power switch 5 to the sockets of each module through each module power circuit inside the printed board 4, the printed board 4 is also provided with a module switch 6 for controlling the on-off of each module power circuit, the module switch 6 is a normally-closed switch, the normally-closed switch is provided with a reset piece for keeping the switch in an off state and a push rod for driving the switch to be closed, when the module 2 is inserted into the case 1, the push rod of the module switch 6 penetrates through the bottom plate 3 or even the case 1, at the moment, the module switch is in an off state, and the power circuit corresponding to the module socket is disconnected; when the module 2 is inserted into the case 1, the push rod of the module switch 6 is pushed by the module 2 to compress the reset piece, when the module 2 is inserted in place, the module switch 6 is in short circuit, a power circuit where the module switch is located is closed, and current is generated between a socket and a plug; the module switch 6 can realize the independent control of each module power supply, and prevent the electric arc generated by hot plugging.

In the embodiment of the present invention, the module switch 6 is located on the + pole power supply circuit of the single module, but is not limited thereto.

In embodiment 1 of the present invention, the module switch 6 is a normal normally-closed switch, and includes a base 7, two terminals 8 fixed on the base 7, a push rod 11, a return spring 9 fixed between the push rod 11 and the base 7, and two contacts 10 fixed on the push rod 11. In this embodiment, the base 7 is fixed on the chassis bottom plate 3, the push rod 11 passes through the bottom plate 3 under the action of the return spring 9 and extends into the chassis, and the tail of the binding post 8 is connected to a + pole circuit of the module power circuit; when the module 2 is inserted into the case 1, the push rod 11 compresses the return spring 9 to move towards the base 7 under the action of the module 2, when the module 2 is inserted in place, the contact 10 is contacted with the binding post 8, the module switch 6 is short-circuited, and the module power circuit is conducted. In the embodiment of the invention, the module switch 6 can close the short circuit only when the module 2 is inserted in place, so that the module power circuit is conducted, and the embodiment not only has the function of controlling the module power circuit to prevent hot plugging, but also has the function of identifying the module insertion in place.

In embodiment 2 of the present invention, the module switch 6 is a switch type connector, the switch type connector includes a switch plug and a switch socket that are plugged together at the front ends, wherein an elastic restoring body 15 is disposed between the switch plug and the switch socket to provide a separating force for the switch plug and the switch socket, the switch plug and the switch socket are maintained in an off state under the action of the elastic restoring body 15, the switch plug and the switch socket are further axially limited by the cooperation of the card platform 20 and the card slot 21 to prevent the switch plug and the switch socket from being separated from each other, and the length of the card slot 21 is not less than the moving distance of the switch plug and the switch socket when being plugged. Two contact pins 13 are arranged in a socket insulator 12 of the switch socket, and the tail parts of the contact pins 13 extend out of the socket insulator 12 to be connected with a + pole circuit of a module power circuit on the printed board 4. The switch plug comprises two jacks 18 matched with the pins 12, and the tails of the two jacks 18 are communicated, so that when the plug 12 is plugged into the jacks 18, the switch type connector is in a short-circuit state, and a module power circuit is conducted. In this embodiment, the two jacks 18 are connected at their tail ends by wires 19, but not limited thereto.

In this embodiment, the socket insulator 12 is further provided with at least two axially extending connecting pieces 14, by means of which connecting pieces 14 the switch-type connector is fixed to the base plate 3. The elastic restoring bodies 15 are springs, two of the elastic restoring bodies are respectively sleeved on one connecting piece 14, and a flat gasket 22 and a spring gasket 23 are further arranged between the connecting piece 14 and the rear end face of the socket insulator 12 to prevent the connecting piece 14 from loosening in a vibration environment. In this embodiment, the connecting member 14 is a screw, but is not limited thereto.

The switch plug includes a plug insulator 17 at a front end and a push rod insulator 16 at a rear end, wherein the jack 18 and the wire 19 are fixed in the plug insulator 17, and in this embodiment, the plug insulator 17 and the push rod 16 are detachably connected by a bayonet and a catch, but not limited thereto.

The push rod insulator 17 comprises an inserting part at the front end and a force application part at the rear end, wherein a clamping table 20 is arranged on the periphery of the inserting part, positioning holes 24 for the connecting piece 14 to pass through are further formed in two sides of the inserting part, when the switch connector is fixed, the rear end face of the inserting part is in end face contact with the bottom plate 3, the force application part passes through the bottom plate 3 or even in a case, when the module is installed, the push rod insulator 17 moves towards one side of the socket insulator under the pushing of the module 2 and is synchronously inserted with the connector in the case, the independent control of each module power supply is realized, and the live plugging and unplugging are prevented.

In this embodiment, in order to facilitate the soldering of the contact pin 13 to the printed board 4, the tail portion of the contact pin 13 is bent twice and then extends axially along the socket insulator 5 to be soldered perpendicularly to the printed board 4. That is, in this embodiment, the pin 13 is a U-shaped structure as a whole. In order to ensure the welding reliability between the contact pin 13 and the printed board 4 and prevent the tail part of the contact pin 13 from swinging, a supporting table 25 for supporting the part of the tail part of the contact pin 13 extending along the axial direction of the socket insulator is further arranged outside the socket insulator 5, two grooves for accommodating the contact pin 13 and limiting the deflection of the contact pin are formed in the supporting table 25, and the contact pin 13 is limited in the grooves.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a safety frame with module power switch, its includes quick-witted case, the assembly at a plurality of modules of quick-witted incasement and fixes the printing board in quick-witted case bottom plate below, and this printing board distributes the power through a plurality of module power supply circuit that distribute on it for the socket on the quick-witted case bottom plate, its characterized in that: a plurality of module switches for controlling the on-off of a single module power circuit are also fixed on the chassis bottom plate, and when the module is not inserted, a push rod of the module switch penetrates through the chassis bottom plate to extend into the chassis under the driving of the elastic restoring body, and the module switch keeps an off state at the moment; when the module is inserted, the push rod of the module switch is pushed by the module to compress the elastic restoring body to move to the closed position, and when the module is inserted in place, the module switch is in the closed state, and the corresponding module power circuits are communicated.

2. The security chassis with modular power switch of claim 1, wherein: wherein the module switch is connected to the + pole circuit of the single module power circuit.

3. A safety rack having a modular power switch as claimed in claim 2, wherein: the module switch comprises a base, a push rod and a reset spring, wherein two binding posts are fixed on the base, two contacts are arranged on the push rod, the reset spring is fixed between the base and the push rod, and the tail parts of the two binding posts are connected to a + pole circuit of the module power circuit.

4. A safety rack having a modular power switch as claimed in claim 2, wherein: the module switch is a switch type connector, the switch type connector comprises a switch plug and a switch socket, the front end of the switch plug is plugged oppositely, the tail parts of two contact pieces in the switch plug are conducted, the switch plug and the switch socket are kept in a disconnected state under the action of the elastic restoring body, and the push rod is positioned on the switch plug.

5. The security chassis with modular power switch of claim 4, wherein: the switch plug and the switch socket are axially limited by the matching of the clamping table and the clamping groove, so that the switch plug and the switch socket are prevented from being separated from each other under the action of the elastic restoring body, and the length of the clamping groove meets the requirement of relative movement of the switch plug and the switch socket in the inserting and closing process.

6. The security chassis with modular power switch of claim 5, wherein: the switch socket comprises a socket insulator and two contact pins fixed in the socket insulator, the elastic reset body is positioned in the socket insulator, at least two connecting pieces extending along the axial direction are further arranged on the socket insulator, and the connecting pieces penetrate through positioning holes in the switch plug to fix the switch type connector on a bottom plate of the machine case.

7. The security chassis with modular power switch of claim 6, wherein: wherein switch plug include the plug insulator of front end and the push rod of rear end, be equipped with the jack of two afterbody intercommunications in the plug insulator, the push rod includes the portion of closing of inserting of front end and the application of force portion of rear end, wherein insert the portion both sides of closing and have arranged a locating hole respectively, application of force portion can pass chassis base plate under the effect of elastic restoring body and extend quick-witted incasement portion.

8. The security chassis with modular power switch of claim 7, wherein: the periphery of the inserting part is provided with a clamping table, and the socket insulator is provided with a corresponding clamping groove.

9. The security chassis with modular power switch of claim 7, wherein: the push rod and the plug insulator are connected and positioned through the matching of the clamping table and the clamping groove.

10. The security chassis with modular power switch of claim 5, wherein: the tail part of the contact pin extending out of the socket insulator extends along the axial direction of the socket insulator after being bent and is supported on a supporting table on the socket insulator, and the supporting table is also provided with a groove for preventing the contact pin from deflecting.