CN108766838A - Self-latching relay - Google Patents

Self-latching relay Download PDF

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Publication number
CN108766838A
CN108766838A CN201810827295.8A CN201810827295A CN108766838A CN 108766838 A CN108766838 A CN 108766838A CN 201810827295 A CN201810827295 A CN 201810827295A CN 108766838 A CN108766838 A CN 108766838A
Authority
CN
China
Prior art keywords
self
armature
locking mechanism
electromagnetic part
normally opened
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810827295.8A
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Chinese (zh)
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CN108766838B (en
Inventor
郑皆乐
王保军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Source Control Energy Saving Technology Group Co Ltd
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Zhejiang Source Control Energy Saving Technology Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Zhejiang Source Control Energy Saving Technology Group Co Ltd filed Critical Zhejiang Source Control Energy Saving Technology Group Co Ltd
Priority to CN201810827295.8A priority Critical patent/CN108766838B/en
Publication of CN108766838A publication Critical patent/CN108766838A/en
Application granted granted Critical
Publication of CN108766838B publication Critical patent/CN108766838B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00Details of electromagnetic relays
    • H01H50/16Magnetic circuit arrangements
    • H01H50/18Movable parts of magnetic circuits, e.g. armature
    • H01H50/32Latching movable parts mechanically

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Abstract

A kind of self-latching relay of disclosure of the invention, including pedestal, armature and the electromagnetic part being set in turn on pedestal, supporting rod, self-locking mechanism and normally opened contact portion;Armature is arranged on supporting rod;When electromagnetic part is powered, one end of armature is pull-in in electromagnetic part, and the other end control self-locking mechanism of armature is in self-locking or unlocked state;Self-locking mechanism is set between the other end of armature and normally opened contact portion;At work, by power on/off of electromagnetic part, so that armature control self-locking mechanism is kept self-locking or unlocked state, normally opened contact portion is allowed to remain closed or disconnect.Invention only needs primary to the of short duration power on/off of electromagnetic part adhesive armature, being switched on or switched off for circuit can be realized using self-locking mechanism, and self-locking or unlocked state are kept before be powered next time, to effectively reduce power consumption, eliminates coil and work long hours caused security risk.

Description

Self-latching relay
Technical field
Invention is related to relay technical field more particularly to a kind of self-latching relay.
Background technology
What existing electromagnetic relay was generally made of iron core, coil, armature and contact reed etc..As long as in coil two End adds certain voltage, will pass through certain electric current in coil, to generate galvanomagnetic-effect, armature will be inhaled in electromagnetic force The pulling force of return spring is overcome to be drawn to iron core under the action of drawing, to the movable contact with moving armature and stationary contact (normally opened contact) It is attracted.It needs persistently to be powered to coil, ability holding armature actuation allows relay to work.It can cause in this way because coil is long-term There is power consumption height, the short problem of coil service life in energization;And there is also safety caused by coil heat dissipation not in time is hidden Suffer from.
Invention content
The self-latching relay provided is invented, main purpose is that existing electromagnetic relay is overcome to need persistently to coil Energization makes relay work, caused by high energy consumption and there are problems that security risk.
In order to solve the above technical problems, invention adopts the following technical scheme that:
A kind of self-latching relay, including pedestal, armature and the electromagnetic part being set in turn on pedestal, supporting rod, from Latch mechanism and normally opened contact portion;
The armature is arranged on supporting rod;When electromagnetic part powers off, one end of the armature is located in the electromagnetic part Side, the other end of the armature are located at the side of the self-locking mechanism;When electromagnetic part is powered, one end of the armature is pull-in on In the electromagnetic part, the other end of the armature controls the self-locking mechanism and is in self-locking or unlocked state;
The self-locking mechanism is set between the other end of armature and normally opened contact portion;
At work, by power on/off of the electromagnetic part, the armature control self-locking mechanism is made to keep self-locking or solution Lock status allows the normally opened contact portion to remain closed or disconnect.
As a kind of embodiment, the self-locking mechanism includes shell, top cap, left tooth post, right tooth post, push rod and answers Position spring;
The shell setting is on the base;
The left tooth post, in the housing, top cap and right tooth post is arranged in internal slide for fixed setting;The one of the left tooth post End is equipped with the first limit rib, offers equally distributed limiting slot on another end wall of the left tooth post, adjacent two limiting slot it Between end face have two level dentation lug boss;
The second limit rib is arranged in the lower end of the top cap, and lower face is equipped with equally distributed detent projection portion;
The right tooth post includes ontology, the limit rib coordinated on the body with the limiting slot, the limit is arranged The upper end of rib has level-one detent projection portion;The limit rib cooperates with limiting slot, level-one detent projection portion difference With the detent projection portion and two level dentation raised portion fits;
The push rod is arranged between the right tooth post and normally opened contact portion;
The resetting spring is set between push rod and the pedestal, and the resetting spring is constantly in compressive state.
As a kind of embodiment, there is lug boss, the resetting spring to be set to lug boss and institute on the push rod It states between pedestal.
As a kind of embodiment, the limiting slot is identical with the limit quantity of rib, is 4.
As a kind of embodiment, 90 degree to 120 degree of the crown angle in the detent projection portion.
As a kind of embodiment, the other end of the armature is equipped with strut;
The strut pushes the top cap of the self-locking mechanism to move horizontally when armature is attracted.
As a kind of embodiment, anti-unusual fluctuation spring is equipped between the armature and supporting rod.
As a kind of embodiment, the normally opened contact portion includes the first leaf spring and is arranged in parallel with first leaf spring The second leaf spring;
First leaf spring, one end are fixed on the pedestal, and the other end is provided with the first contact;
Second leaf spring, one end are fixed on the pedestal, and the other end is provided with coordinated with first contact Two contacts.
As a kind of embodiment, the electromagnetic part includes coil and iron core;
On the base, the coil setting is described when the coil is powered in iron core surrounding for iron core setting Iron core is attracted the armature.
Compared with prior art, the technical program has the following advantages:
Invent provide self-latching relay, self-locking mechanism is set between armature and normally opened contact portion, using electromagnetic part, Armature coordinates the lever principle that supporting rod is realized so that at work, by power on/off of electromagnetic part, armature is made to control self-locking Mechanism keeps self-locking or unlocked state, and normally opened contact portion is allowed to remain closed or disconnect.To be implemented without always to electromagnetic part Coil be powered, it is only necessary to it is primary to the of short duration power on/off of electromagnetic part adhesive armature, self-locking mechanism can be controlled and complete self-locking or solution Lock to realize being switched on or switched off for circuit, and keeps self-locking or unlocked state before be powered next time, to effectively reduce electricity Can consumption, eliminate coil and work long hours caused security risk.
Description of the drawings
Fig. 1 is the structural schematic diagram for the self-latching relay that inventive embodiments one provide;
Fig. 2 is the structural schematic diagram that self-locking mechanism omits shell in Fig. 1.
In figure:1, pedestal;2, armature;31, coil;32, iron core;4, supporting rod;51, shell;52, top cap;53, left tooth Column;54, right tooth post;55, push rod;56, resetting spring;61, the first leaf spring;62, the first contact;63, the second leaf spring;64, second Contact;7, anti-unusual fluctuation spring;8, strut.
Specific implementation mode
Below in conjunction with attached drawing, the technical characteristic and advantage of inventing above-mentioned and other are clearly and completely described, shown So, described embodiment is only the section Example invented, rather than whole embodiments.
Referring to Fig. 1, the self-latching relay that inventive embodiments one provide, including pedestal 1, armature 2 and set gradually In electromagnetic part, supporting rod 4, self-locking mechanism and normally opened contact portion on pedestal 1;Armature 2 is arranged on supporting rod 4;In electromagnetism When portion powers off, one end of armature 2 is located above electromagnetic part, and the other end of armature 2 is located at the side of self-locking mechanism;It is logical in electromagnetic part When electric, one end of armature 2 is pull-in in electromagnetic part, and the other end control self-locking mechanism of armature 2 is in self-locking or unlocked state;From Latch mechanism is set between the other end of armature 2 and normally opened contact portion;At work, by power on/off of electromagnetic part, make rank Iron 2 controls self-locking mechanism and keeps self-locking or unlocked state, and normally opened contact portion is allowed to remain closed or disconnect.
It should be noted that pedestal 1 is made of insulating materials, 31 end of coil of electromagnetic part and the contact in normally opened contact portion End can be welded on pedestal 1.External power supply is powered by 31 end of coil for electromagnetic part, and contact end can connect Follow-up work circuit.Armature 2 can be strip structure, and the middle and upper part of armature 2 is connect with supporting rod 4 so that armature 2 is to connect Point is the bar rod structure of supporting point.In order to reduce the size of entire self-latching relay, the armature 2 of bending-like may be used, hold in the mouth The bending part of iron 2 is as the tie point with supporting rod 4.And the position of bending can be the middle and upper part of armature 2, and the rank after bending The angle that 2 both ends of iron are formed is obtuse angle.So that when electromagnetic part powers off, armature 2 can make armature 2 and electromagnetism under the effect of gravity Portion separates.In order to enhance the reliability resetted after actuation, anti-unusual fluctuation spring 7 can be equipped between armature 2 and supporting rod 4.I.e. One end of anti-unusual fluctuation spring 7 is fixed on supporting rod 4, and the other end and the armature 2 of anti-unusual fluctuation spring 7 are fixed, and anti-unusual fluctuation bullet is utilized The position of the barrier armature 2 of trying hard to keep of spring 7 makes armature 2 reset to initial makeup location after electromagnetic part power-off.In other embodiment In, position for anti-unusual fluctuation spring 7 is simultaneously not limited, and anti-unusual fluctuation spring 7 can be set to right side and the rank of supporting rod 4 Between iron 2.
There are two types of use states, respectively self-locking or unlocked state for self-locking mechanism tool, and both states all have holding Type.The switching of both states is a power on/off by electromagnetic part, gives armature 2 and switches self-locking mechanism self-locking or unlock shape The control force of state.And normally opened contact portion makes normally opened contact portion be in and is closed when self-locking mechanism is in self-locking state.It is normally opened to touch Point portion makes normally opened contact portion be in normally opened when self-locking mechanism is in the unlocked state.Above-mentioned self-locking or solution using self-locking mechanism Lock status can be realized to control the make and break situation of normally opened contact by diversified forms, and mechanical structure realization may be used, can also It is realized using circuit.It is realized if it is using circuit, can be realized using holding circuit and control circuit is compared.If adopted It, specifically can be as follows using process with mechanical mechanism:
When needing relay to be attracted, it is only necessary to add suitable amplitude and continue the pulse voltage of width to electromagnetic part, armature 2 So that the other end of armature 2 is moved to right with electromagnetic part actuation and by the transmission of self-locking mechanism, make the contact closure in normally opened contact portion, it is main Loop works.After pulse voltage terminates output, electromagnetic part is restored to power failure state, and armature 2 resets under gravity, but by In the self-locking of self-locking mechanism, make contact closure that can be continuously turned on the arrival until next control pulse voltage.Exist in this way When contact needs long secondary closure, because electromagnetic part does not apply voltage and would not generate heat yet for a long time, solve under certain use environments, Due to radiate it is bad caused by relay temperature drastically increase and cause relay service life reduce sharply even electromagnetic part line Circle 31 burns the generation of the imagination.
When needing relay contact to disconnect, then needs to apply suitable amplitude again and continue the pulse voltage of width to electricity Magnetic portion, armature 2 make the other end of armature 2 move to right and by the transmission of self-locking mechanism, make normally opened contact portion with electromagnetic part actuation Contact disconnects, and major loop is stopped.After the electromagnetic part power-off of relay, armature 2 resets under the effect of gravity, but due to self-locking The self-locking of mechanism, contact, which disconnects, can be continuously turned off the arrival until next closing pulse voltage.
As long as at work, making armature 2 control self-locking mechanism by power on/off of electromagnetic part and keeping self-locking or unlock shape State allows normally opened contact portion to remain closed or disconnect, can solve existing electromagnetic relay need persistently to the energization of coil 31 make after Electrical work, caused by high energy consumption and there are problems that security risk.And for the specific of self-locking mechanism and normally opened contact portion Structure or circuit herein and are not limited.
The self-latching relay provided is provided, self-locking mechanism is set between armature 2 and normally opened contact portion, utilizes electromagnetism Portion, armature 2 coordinate the lever principle that supporting rod 4 is realized so that at work, by power on/off of electromagnetic part, make armature 2 It controls self-locking mechanism and keeps self-locking or unlocked state, normally opened contact portion is allowed to remain closed or disconnect.To be implemented without always It is powered to the coil 31 of electromagnetic part, it is only necessary to it is primary to 2 of short duration power on/off of electromagnetic part adhesive armature, it is complete self-locking mechanism to be controlled At self-locking or unlock, to realize being switched on or switched off for circuit, and self-locking or unlocked state are kept before be powered next time, to Power consumption is effectively reduced, coil 31 is eliminated and works long hours caused security risk.
In this present embodiment, mechanical structure is all made of using self-locking mechanism and normally opened contact portion.
Be illustrated in figure 2 the structural schematic diagram that self-locking mechanism omits shell 51, self-locking mechanism include shell 51, top cap 52, Left tooth post 53, right tooth post 54, push rod 55 and resetting spring 56;Shell 51 is arranged on pedestal 1;Left tooth post 53, fixed setting In shell 51, top cap 52 and right tooth post 54 is arranged in internal slide;One end of left tooth post 53 is equipped with the first limit rib, left tooth post Equally distributed limiting slot is offered on 53 another end wall, the end face between adjacent two limiting slot has two level detent projection Portion;The second limit rib is arranged in the lower end of top cap 52, and lower face is equipped with equally distributed detent projection portion;Right tooth post 54 includes this The limit rib with limiting slot cooperation, the upper end for limiting rib have level-one detent projection portion on the body for body, setting;Limit rib and limit Position slot cooperate, level-one detent projection portion respectively with detent projection portion and two level dentation raised portion fits;The setting of push rod 55 exists Between right tooth post 54 and normally opened contact portion;Resetting spring 56 is set between push rod 55 and pedestal 1, and resetting spring 56 is constantly in Compressive state.
Left tooth post 53 is integrally fixed at motionless in shell 51.It, can be by shell 51 and left tooth post 53 in other embodiment It is made of one.Top cap 52, right tooth post 54 and push rod 55 can move horizontally in shell 51, and shell 51 can be by detachable Left and right shell 51 form, facilitate the installation of its internal part.Resetting spring 56 is constantly in compressive state, i.e., gives the right side always The power of tooth post 54 to the left.Push rod 55 is made of insulating materials.There is lug boss, resetting spring 56 to be set to lug boss on push rod 55 Between pedestal 1.Can thus resetting spring 56 be utilized to reset push rod 55.It is of course also possible to be arranged on push rod 55 multistage Step is just realized.
Level-one detent projection portion can respectively with detent projection portion and two level dentation raised portion fits.Self-locking mechanism is in solution When lock status, the limit rib of right tooth post 54 is inserted into the limiting slot of left tooth post 53, since resetting spring 56 exists so that push rod 55 and right tooth post 54 be held down always, limit rib cannot be detached from from limiting slot.At this point, level-one detent projection portion and detent projection Portion coordinates, and top cap 52 is turned left top.And self-locking mechanism gives the power of top cap 52 to the right, top cap 52 is made to push away when being in self-locking state Right tooth post 54 is moved to move right.The limit rib of right tooth post 54 is detached from from the limiting slot of left tooth post 53 so that level-one detent projection Portion and two level dentation raised portion fits, to make push rod 55 move right;Due to the effect of 53 two level dentation lug boss of left tooth post, So that level-one detent projection portion is limited so that self-locking mechanism is in self-locking state.It should be noted that in the limit of right tooth post 54 When position rib is detached from from the limiting slot of left tooth post 53, since level-one detent projection portion and detent projection portion coordinate, in resetting spring Under the action of 56 power, the crown in level-one detent projection portion slides from the crown in detent projection portion, to generate one to right tooth post 54 rotary force makes the limit rib of right tooth post 54 be detached from from the limiting slot of left tooth post 53.It, can also hand in other embodiment It moves to realize switching.As long as a hand push button is arranged again, hand push button directly controls actuation or the opening of armature 2;By armature 2 The top cap 52 that power is transferred to self-locking mechanism can be realized.Relay is forced to close a floodgate when pressing hand push button next time, major loop It connects.When pressing again, separating brake, major loop is forced to disconnect by the effect of self-locking mechanism.
In order to which the unlock and self-locking state switching that make self-locking mechanism are stablized, limiting slot is identical with the limit quantity of rib, is 4 It is a.In other embodiment, the quantity of limiting slot and limit rib can be different, but number of the quantity of limiting slot than limiting rib Amount is more.For example, when the quantity of limiting slot is 4, the quantity for limiting rib is 2 or 3.In order to which state switching is more stablized, tooth 90 degree to 120 degree of the crown angle of shape lug boss.
Since armature 2 and the forced area of top cap 52 are small, in order to improve the stability of power transmission.On the other end of armature 2 Equipped with strut 8;Strut 8 pushes the top cap 52 of self-locking mechanism to move horizontally when armature 2 is attracted.Strut 8 is connect with armature 2 One end carries inclined-plane so that the other end of strut 8 is in parallel position with top cap 52.
In this present embodiment, normally opened contact portion may include the first leaf spring 61 and with the first leaf spring 61 disposed in parallel second Leaf spring 63;First leaf spring 61, one end are fixed on pedestal 1, and the other end is provided with the first contact 62;Second leaf spring 63, one end It is fixed on pedestal 1, the other end is provided with the second contact 64 coordinated with the first contact 62.First leaf spring 61 by push rod 55 to After right power, deformation will produce so that access is completed in the first contact 62 and the contact of the second contact 64.And after thrust revocation, the One leaf spring 61 returns to original position under the action of selfer power so that the first contact 62 and the second contact 64 separate, complete At open circuit.In other embodiment, the tail end of push rod 55 can be fixedly connected with the first leaf spring 61.So at self-locking mechanism When self-locking state, push rod 55 pushes the first deformation to the right of leaf spring 61 that the first contact 62 and the second contact 64 is made to contact.And certainly When latch mechanism is in the unlocked state, push rod 55 pulls the first deformation to the left of leaf spring 61 that the first contact 62 and the second contact 64 is made to divide From to improve the reliability and stability that normally opened contact portion uses.It, can be by the first contact 62 and in other embodiment Closed type is changed into two contacts 64 or opening and closing is combined.And the quantity of contact can increase or increasing section product, to increase Big conductive capability.
In this present embodiment, electromagnetic part may include coil 31 and iron core 32;Iron core 32 is arranged on pedestal 1, coil 31 It is arranged in 32 surrounding of iron core, when coil 31 is powered, 32 adhesive armature 2 of iron core.Only need it is primary to 31 of short duration power on/off of coil, It is primary that 32 adhesive armature 2 of iron core can be completed.
Although invention has been described by way of example and in terms of the preferred embodiments, it is not for limiting invention, any art technology Personnel may be by the methods and technical content of the disclosure above to inventive technique side in the spirit and scope for not departing from invention Case makes possible variation and modification, therefore, every content without departing from inventive technique scheme, the technical spirit pair according to invention Any simple modifications, equivalents, and modifications made by above example belong to the protection domain of inventive technique scheme.

Claims (9)

1. a kind of self-latching relay, which is characterized in that including pedestal, armature and the electromagnetic part being set in turn on pedestal, Supporting rod, self-locking mechanism and normally opened contact portion;
The armature is arranged on supporting rod;When electromagnetic part powers off, one end of the armature is located above the electromagnetic part, The other end of the armature is located at the side of the self-locking mechanism;When electromagnetic part is powered, one end of the armature is pull-in on institute It states in electromagnetic part, the other end of the armature controls the self-locking mechanism and is in self-locking or unlocked state;
The self-locking mechanism is set between the other end of armature and normally opened contact portion;
At work, by power on/off of the electromagnetic part, the armature control self-locking mechanism is made to keep self-locking or unlock shape State allows the normally opened contact portion to remain closed or disconnect.
2. self-latching relay as described in claim 1, which is characterized in that the self-locking mechanism includes shell, top cap, left tooth Column, right tooth post, push rod and resetting spring;
The shell setting is on the base;
The left tooth post, in the housing, top cap and right tooth post is arranged in internal slide for fixed setting;One end of the left tooth post is set There is the first limit rib, offer equally distributed limiting slot on another end wall of the left tooth post, between adjacent two limiting slot End face has two level dentation lug boss;
The second limit rib is arranged in the lower end of the top cap, and lower face is equipped with equally distributed detent projection portion;
The right tooth post includes ontology, the limit rib coordinated on the body with the limiting slot is arranged, the limit rib Upper end has level-one detent projection portion;The limit rib and limiting slot cooperate, level-one detent projection portion respectively with institute State detent projection portion and two level dentation raised portion fits;
The push rod is arranged between the right tooth post and normally opened contact portion;
The resetting spring is set between push rod and the pedestal, and the resetting spring is constantly in compressive state.
3. self-latching relay as claimed in claim 2, which is characterized in that have lug boss, the reset on the push rod Spring is set between lug boss and the pedestal.
4. self-latching relay as claimed in claim 2, which is characterized in that the limiting slot is identical with the limit quantity of rib, It is 4.
5. self-latching relay as claimed in claim 2, which is characterized in that 90 degree of the crown angle in the detent projection portion is extremely 120 degree.
6. self-latching relay as claimed in claim 2, which is characterized in that the other end of the armature is equipped with strut;
The strut pushes the top cap of the self-locking mechanism to move horizontally when armature is attracted.
7. self-latching relay as described in claim 1, which is characterized in that be equipped with anti-unusual fluctuation between the armature and supporting rod Spring.
8. self-latching relay as described in claim 1, which is characterized in that the normally opened contact portion include the first leaf spring and with First leaf spring, second leaf spring disposed in parallel;
First leaf spring, one end are fixed on the pedestal, and the other end is provided with the first contact;
Second leaf spring, one end are fixed on the pedestal, and the other end is provided with second coordinated with first contact and touches Point.
9. self-latching relay as described in claim 1, which is characterized in that the electromagnetic part includes coil and iron core;
On the base, the coil is arranged in iron core surrounding, when the coil is powered, the iron core for the iron core setting It is attracted the armature.
CN201810827295.8A 2018-07-25 2018-07-25 Self-locking relay Active CN108766838B (en)

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Application Number Priority Date Filing Date Title
CN201810827295.8A CN108766838B (en) 2018-07-25 2018-07-25 Self-locking relay

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Application Number Priority Date Filing Date Title
CN201810827295.8A CN108766838B (en) 2018-07-25 2018-07-25 Self-locking relay

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CN108766838B CN108766838B (en) 2024-06-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622615A (en) * 2020-05-25 2020-09-04 北方民族大学 Telescopic machanism, access control system and automatic conveyor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2798300Y (en) * 2005-08-30 2006-07-19 张兴建 Bidirectional full self locking relay
CN101452792A (en) * 2007-11-29 2009-06-10 周柔刚 Self locking type electricity saving relay
CN106910661A (en) * 2017-03-28 2017-06-30 厦门宏发电声股份有限公司 A kind of relay with bilateral holding function
CN208570481U (en) * 2018-07-25 2019-03-01 浙江源控节能科技集团有限公司 Self-latching relay

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2798300Y (en) * 2005-08-30 2006-07-19 张兴建 Bidirectional full self locking relay
CN101452792A (en) * 2007-11-29 2009-06-10 周柔刚 Self locking type electricity saving relay
CN106910661A (en) * 2017-03-28 2017-06-30 厦门宏发电声股份有限公司 A kind of relay with bilateral holding function
CN208570481U (en) * 2018-07-25 2019-03-01 浙江源控节能科技集团有限公司 Self-latching relay

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622615A (en) * 2020-05-25 2020-09-04 北方民族大学 Telescopic machanism, access control system and automatic conveyor

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