CN110607948B

CN110607948B - Electric door latch control device

Info

Publication number: CN110607948B
Application number: CN201810614888.6A
Authority: CN
Inventors: 徐伟忠
Original assignee: I Tek Metal Manufacturing Co Ltd
Current assignee: I Tek Metal Manufacturing Co Ltd
Priority date: 2018-06-14
Filing date: 2018-06-14
Publication date: 2020-12-01
Anticipated expiration: 2038-06-14
Also published as: CN110607948A

Abstract

The invention provides an electric latch control device, which comprises an assembly part and a locking part pivoted with the assembly part, wherein the locking part comprises a clamping end, the latch control device further comprises a positioning part pivoted with the assembly part and capable of being embedded with the clamping end, and a driving device fixedly arranged on the assembly part, the driving device is combined with a limiting part in a linkage manner, when the limiting part is positioned at a blocking position for blocking the pivoting of the positioning part, the locking part is limited by the positioning part and cannot pivot from a locking position to an unlocking position, a latch of a door lock is limited in an opening of the latch control device, and when the limiting part is positioned at a non-blocking position for not blocking the pivoting of the positioning part, the locking part is allowed to pivot from the locking position to the unlocking position, so that the door lock is.

Description

Electric door latch control device

Technical Field

The present invention relates to a door latch control device, and more particularly, to an electric door latch control device that can be directly applied to an existing mechanical door lock and is electronically controlled by a door latch of the door lock.

Background

A commercially available door lock is mounted on a door and pivots with the door, a fixed latch hole is provided in a frame of the corresponding door to provide engagement of a latch of the door lock, the latch engages with the latch hole when the door is closed, the door cannot be opened without retracting the latch of the door lock out of the latch hole, and in a locked state of the door lock, it is necessary to use a correct key to operate the door lock to unlock and further retract the latch out of the latch hole.

With the progress of science and technology, more and more electronic door locks are applied to doors, which can be operated to lock or unlock in combination with an access card, a mobile phone or other electronic devices, however, if the door with a mechanical door lock is to be locked or unlocked electronically, the whole set of mechanical door locks must be replaced, so the existing mechanical door locks cannot be used.

Disclosure of Invention

The invention aims to provide an electric latch control device to solve the problem that the existing mechanical lock is controlled by an electronic means.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electric door latch control device comprising: an assembly member comprising two pivoting seats spaced apart from each other, each pivoting seat comprising a first pivoting portion, and one of the two pivoting seats further comprising a second pivoting portion spaced apart from the first pivoting portion, a housing mounted at an outer side of the assembly member, the housing comprising an opening, a locking member pivotally connected to the assembly member, the locking member comprising two pivoting portions spaced apart from each other and a locking portion extending between the two pivoting portions, one of the two pivoting portions comprising a locking end, the two pivoting portions of the locking member being pivotally connected to the first pivoting portions of the two pivoting seats, respectively, and the pivoting portion comprising the locking end being pivotally connected to the pivoting seat comprising the second pivoting portion, the locking member being pivotable to a locking position at which the locking portion closes the opening or to an unlocking position at which the locking portion opens the opening, a positioning member pivotally connected to the second pivoting portion of the pivoting seats, the positioning piece comprises a first end and a second end, the positioning piece can be pivoted to a clamping position where the second end is clamped with the clamping end of the locking piece or a non-clamping position where the second end is separated from the clamping end, when the locking piece is positioned at a locking position, the positioning piece is positioned at the clamping position, when the locking piece is positioned at an unlocking position, the positioning piece is positioned at the non-clamping position, the driving device is fixed on the assembly piece, the limiting piece can be combined with the driving device in a driving mode by the driving device, and the limiting piece can be displaced to a blocking position of the first end of the clamping positioning piece or a non-blocking position of the first end of the non-clamping positioning.

When the limiting piece is located at the blocking position, the positioning piece is located at the clamping position and the locking piece is located at the locking position, the locking piece is not allowed to pivot from the locking position to the unlocking position, and when the limiting piece is located at the non-blocking position, the positioning piece is located at the clamping position and the locking piece is located at the locking position, the locking piece is allowed to pivot from the locking position to the unlocking position.

The door latch control device can be controlled by an electronic means or technology, so that a traditional mechanical door lock can be continuously used after being matched with the door latch control device and the door latch control device can be controlled by the electronic means or technology.

The electric door latch control device further includes: a door opening detection unit mounted on the assembly; a passive member pivotally coupled to the locking member, the passive member being configured to activate the door opening detection unit, the passive member activating or deactivating one of the door opening detection units when the locking member is in the locked position, and the passive member activating or deactivating the other of the door opening detection units when the locking member is in the unlocked position.

The electric door latch control device further includes: the assembly further comprises a connecting seat, the connecting seat comprises a moving hole for movably accommodating the pushing member, the door opening detection unit is mounted on the connecting seat and aligned with the pushing member, the driven member comprises a surface facing the door opening detection unit and a groove formed in the surface, when the locking member is located at a locking position, the groove of the driven member is aligned with the pushing member, the pushing member does not trigger the door opening detection unit, when the locking member is located at an unlocking position, the groove of the driven member is staggered with the pushing member, and the pushing member is supported by the surface of the driven member and displaces to trigger the door opening detection unit.

The electric door latch control device further includes: and one of the first shafts comprises a linkage end, each first shaft is respectively combined with the two pivot parts of the locking piece to pivot together, each first shaft is respectively pivoted with the first pivot part of the pivoting seat, and the linkage end of the first shaft with the linkage end is combined with the driven piece to pivot together.

The electric door latch control device further comprises a detection module, wherein the detection module comprises: the support comprises an assembly wall, a trigger piece and a door closing detection unit, wherein the trigger piece is pivoted with the assembly wall of the support and comprises an inner end and an outer end, the trigger piece can be pivoted to a door closing position or a door opening position, the door closing detection unit is arranged on the side surface of the assembly wall, the inner end of the trigger piece is configured to trigger the door closing detection unit, when the trigger piece is located at the door closing position, the inner end of the trigger piece triggers or does not trigger one of the door closing detection units, and when the trigger piece is located at the door opening position, the inner end of the trigger piece triggers or does not trigger the other of the door closing detection units.

The electric door latch control device further includes: the assembly wall further comprises a convex part formed on the inner surface and a pivot groove extending from the outer surface to the end surface of the convex part, the convex part further comprises a movable hole extending from the outer side surface to the pivot groove, the trigger part further comprises a side surface and a concave part formed on the side surface and located at the inner end, the trigger part is pivoted in the pivot groove, the outer end of the trigger part is located at the outer side of the outer surface, the pressing part is movably accommodated in the movable hole and abuts against the side surface of the trigger part, when the trigger part is located at the door closing position, the concave part is staggered with the pressing part, the pressing part triggers the door closing detection unit, when the trigger part is located at the door opening position, the pressing part moves into the concave part, and the door closing detection unit is not triggered.

When the locking piece is positioned at the locking position, the locking part of the locking piece is approximately vertical to the assembly piece, and when the locking piece is positioned at the unlocking position, the included angle between the locking part of the locking piece and the assembly piece is between 150 and 180 degrees.

The invention has the advantage that it can be applied to existing mechanical locks.

The present invention will become more apparent from the detailed description of illustrative embodiments thereof given in conjunction with the accompanying drawings.

Drawings

Figure 1 is an exploded perspective view of the door latch control device of the present invention.

Fig. 2 is an exploded perspective view of a detection module of the door latch control device according to the present invention.

Fig. 3 is a perspective assembly view of the door latch control device of the present invention.

Fig. 4 is a cross-sectional view taken along line 4-4 of fig. 3.

Fig. 5 is a cross-sectional view taken along line 5-5 of fig. 4.

Fig. 6 is a cross-sectional view taken along line 6-6 of fig. 5.

Fig. 7 is a view showing a state after the movement of the restricting member to the non-blocking position in the door latch control device according to the present invention.

Fig. 8 is a view showing a state where the latch of the door lock pushes the locking piece to pivot when the door is opened after the latch control device of the present invention unlocks the door.

Fig. 9 is another state view showing that the latch of the door lock pushes the locking piece to pivot when the door is opened after the latch control device of the present invention unlocks the door.

Fig. 10 is a cross-sectional view taken along line 10-10 of fig. 9.

Fig. 11 is a view showing a state where a latch of a door lock is pressed by a locking member to be retracted when a door is closed in the door latch control device according to the present invention.

Fig. 12 is a view showing a state where the door latch control device of the present invention is installed in the normally open position.

Figure 13 is a view of the door latch control device showing the driver drive restraint in the normally open position displaced to the blocking position in accordance with the present invention.

Description of reference numerals: 10 a door latch control device; 20 an assembly part; 22 a pivoting seat; 24 a first pivot portion; 26 a second pivot part; 28 an adjustment hole; 30, positioning holes; 32 mounting holes; 33 a stopper; 34 a normally closed end; 36 normally open ends; 38 adjusting screw; 40 positioning screws; 42 a locking member; 44 a pivot part; 46 a clamping end; 48 a locking portion; 50 a first shaft; 52 a linkage end; 54 return spring; 56 a driven member; 57 surface; 58 grooves; 62 a positioning member; 64 a first end; 66 a second end; 68 a shaft coupling part; 69 a second shaft; 70 a biasing spring; 72 a docking station; 74 a first portion; 76 a second portion; 78 moving the aperture; 80 a door opening detection unit; 82 a pusher member; 84 a drive device; 86 a limiting member; 88 a detection module; 90, a bracket; 91 a bolt hole; 92 assembling a wall; 94 inner surface; 96 outer surface; 98 a pivot groove; 111 a convex portion; 113 a movable hole; 115 a trigger; 117 inner end; 119 outer end; 131 a bonding portion; a 132 side surface; 133 a recess; 135 biasing spring; 136 shaft rod; 138 door closing detection unit; 151 pressing member; 153 a housing; 155 opening; 171 door lock; 173 a latch; 175 a door frame; 176 door.

Detailed Description

The drawings are only for purposes of illustrating the basic teachings, and are not intended to limit the number, position, relationship, and dimensions of the elements making up the illustrative embodiments to the particular embodiments described, or to the extent necessary to enable a person skilled in the art to read and understand the following description. It is also well within the skill of the art to modify the exact dimensions and dimensional proportions to conform to specific force, weight, strength, and similar requirements after the following description has been read and understood.

The same reference numbers will be used throughout the drawings to refer to the same or like parts; it should also be understood that terms such as "top," "bottom," "first," "second," "forward," "rearward," "reverse," "front," "rear," "height," "width," "length," "end," "side," "horizontal," "vertical," and the like are used herein only for ease of reference to the figure by the viewer and to merely aid in the description of illustrative embodiments.

A latch control device of the present invention is fastened to a door frame for restraining or releasing a latch 173 (shown in fig. 4) of a door lock 171 installed at a corresponding door. Referring to fig. 1, the door latch controlling device 10 includes an assembly member 20, the assembly member 20 includes two pivot seats 22 spaced symmetrically, each pivot seat 22 includes a first pivot portion 24 and a second pivot portion 26 spaced from the first pivot portion 24, the assembly member 20 further includes a connecting seat 72 secured to one side of one of the pivot seats 22 and spaced apart therefrom, the connecting seat 72 further includes a first portion 74 and a second portion 76 arranged in an L-shape, the connecting seat 72 further includes a moving hole 78 formed on the first portion 74, the assembly member 20 further includes a plurality of mounting holes 32 disposed outside the two pivot seats 22, each mounting hole 32 includes a normally closed end 34 and a normally open end 36 spaced apart from each other, the assembly member 20 further includes two adjusting holes 28 and positioning holes 30 having circular hole shapes at both ends, the assembly 20 in turn comprises two retaining members 33 spaced apart from each other.

As shown in the drawings, the door latch control device 10 further includes a locking member 42 pivotally connected to the assembly 20, the locking member 42 includes two pivot portions 44 spaced apart from each other and a locking portion 48 extending between the two pivot portions 44, and each pivot portion 44 of the locking member 42 includes a catching end 46 formed at a side thereof.

The locking member 42 is disposed between the first pivot portions 24 of the two pivot seats 22, the two first shafts 50 are respectively pivoted to the first pivot portions 24 of the pivot seats 22, and the first shafts 50 are respectively pivotally combined with the pivot portions 44 of the locking member 42, each first shaft 50 includes a connecting end 52 (located outside the pivot seat 22 as shown in fig. 5) at the end, the connecting end 52 preferably has a non-circular cross-sectional shape, and the two first shafts 50 support the locking member 42 to be pivotable about the first pivot portions 24 to a locking position (as shown in fig. 4) in which the locking portions 48 are perpendicular to the assembly member 20 or an unlocking position (as shown in fig. 9) in which the included angle between the locking portions 48 of the locking member 42 and the assembly member 20 is 150 to 180 °.

In addition, a return spring 54 is sleeved on the outer periphery of one of the first shafts 50, and the return spring 54 is located between the pivot portion 44 of the locking member 42 and the pivot seat 22 (as shown in fig. 5), and the return spring 54 biases the locking member 42 to be located at the locking position.

The door latch control device 10 further includes two positioning members 62 pivotally coupled to each pivot socket 22, each positioning member 62 including a first end 64 and a second end 66, each positioning member 62 further including a pivot portion 68 between the first and

second ends

64, 66.

Two second shafts 69 are combined on the second pivot portion 26 of each pivot seat 22, the respective pivot portions 68 of the two positioning members 62 are respectively pivoted with the corresponding second shafts 69, so that each positioning member 62 can be pivoted to a clamping position (as shown in fig. 6) where the second end 66 is clamped with the clamping end 46 of the locking member 42 or a non-clamping position (as shown in fig. 8) where the second end 66 is separated from the clamping end 46 by using the corresponding second shafts 69 as an axis, two biasing springs 70 are disposed between each positioning member 62 and the corresponding pivot seat 22, each biasing spring 70 respectively biases each positioning member 62 to the non-clamping position, and furthermore, when the locking member 42 is located at the locking position, the positioning member 62 is located at the clamping position.

The door latch control device 10 further includes a passive member 56 that pivots in conjunction with one of the first shafts 50, the passive member 56 including a surface 57 and a groove 58 formed in the surface. The driven member 56 is coupled to the linking end 52 of a first shaft 50 adjacent to the engaging seat 72 (as shown in fig. 5), so that the locking member 42 pivots together with the driven member 56 when pivoting between the locking and unlocking positions, and in fact, the driven member 56 is located between the pivot seat 22 and the engaging seat 72, a pushing member 82 is movably received in the moving hole 78 of the engaging seat 72, the pushing member 82 is received in the groove 58 of the driven member 56 when the locking member 42 is in the locking position (as shown in fig. 5), and the groove 58 of the driven member 56 is separated from the pushing member 82 when the locking member 42 is in the unlocking position, and the pushing member 82 abuts against the surface 57 of the driven member 56.

The second portion 76 of the engaging seat 72 is fixedly provided with a door opening detecting unit 80, the driven member 56 pivots to trigger or not trigger the door opening detecting unit 80, the door opening detecting unit 80 can preferably use a micro switch, the driven member 56 is pressed or not pressed against the door opening detecting unit 80 by a pushing member 82 when pivoting to achieve the triggering or not triggering effect, when the locking member 42 is located at the locking position, the pushing member 82 is not pressed against the door opening detecting unit 80 (as shown in fig. 5), and when the locking member 42 is located at the unlocking position, the pushing member 82 is pressed against the door opening detecting unit 80 (as shown in fig. 7 and 10). In addition, the door opening detection unit 80 may be a micro switch.

The door latch control 10 further includes two drive devices 84 (preferably solenoid valves) selectively positionable on the assembly 20 and two limiting members 86, each limiting member 86 being drivingly engageable with the drive device 84 by the drive device 84.

Each driving device 84 can be selectively assembled to the assembly 20 according to whether the door latch control device 10 is assembled to the normally open state or the normally closed state, as shown in fig. 5, in detail, when each driving device 84 is assembled to the normally closed end 34 of the corresponding mounting hole 32, each limiting member 86 is respectively aligned to a blocking position (shown in fig. 5) of the first end 64 of the corresponding positioning member 62 in a state where the driving device 84 is not energized, each limiting member 33 is assembled to a position where the supporting limiting member 86 is in the blocking position, and after each driving device 84 is energized, each limiting member 86 is displaced to a non-blocking position (shown in fig. 7) staggered from the first end 64 of the corresponding positioning member 62.

Referring to fig. 12, when each driving device 84 is assembled at the normally open end 36 corresponding to each mounting hole 32, each limiting member 86 is at a non-blocking position staggered from the first end 64 of the corresponding positioning member 62 when the driving device 84 is not powered, and each limiting member 33 is adjusted to a position capable of supporting the corresponding limiting member 86 to be kept at the non-blocking position, and after each driving device 84 is powered, each limiting member 86 is shifted to a blocking position aligned with the first end 64 of the corresponding positioning member 62 (as shown in fig. 13). The two limiting members 33 are also used to enable the two limiting members 86 to be positioned in a blocking position (as shown in fig. 13) or in a non-blocking position (as shown in fig. 12) when the two drive devices 84 are not energized

Referring to fig. 1 and 2, the door latch control device 10 further includes a detection module 88, the detection module 88 includes a bracket 90 having a U-shaped cross section, the bracket 90 includes an assembly wall 92, the assembly wall 92 includes an inner surface 94 and an outer surface 96, the assembly wall 92 further includes a protrusion 111 formed on the inner surface 94 and a pivot slot 98 extending from the outer surface 96 to an end surface of the protrusion 111, the protrusion 111 includes a movable hole 113 extending from a side surface to the pivot slot 98. The bracket 90 is fixed on the assembly 20 and located between the two pivoting seats 22. In addition, when the locking member 42 is in the locking position, the locking member 42 and the bracket 90 define a latch hole 91 (shown in fig. 3 and 4).

The detecting module 88 further includes a trigger 115 pivotally connected to the frame 90, the trigger 115 includes an inner end 117 and an outer end 119 spaced apart from the inner end 117, the trigger 115 further includes a side surface 132 and a connecting portion 131 formed between the inner and

outer ends

117, 119, the side surface 132 includes a recess 133 at the inner end 117.

The trigger 115 is received in the pivot slot 98 and pivotally connected to the assembly wall 92 via a shaft 136 through a joint 131 of the trigger 115, an outer end 119 of the trigger 115 is located outside the outer surface 96, and an inner end 117 is located inside the protrusion 111. The trigger 115 is pivotable about a shaft 136 to a closed door position (as shown in fig. 4) or an open door position (as shown in fig. 9 and 11), and a biasing spring 135 is disposed around the shaft 136, the biasing spring 135 is disposed between the trigger 115 and the bracket 90 and biases the trigger 115 to the open door position.

The detecting module 88 further includes a door closing detecting unit 138 and a pressing member 151 mounted on the inner surface 94 and located at one side of the movable hole 113, the triggering member 115 is configured to trigger or not trigger the door-closing detection unit 138, and substantially the pressing member 151 is movably received in the moving hole 113 and abuts against the side surface 132 of the triggering member 115, and substantially, the pressing member 151 is interposed between the side surface 132 of the trigger 115 and the door-closing detection unit 138, therefore, when the trigger 115 is located at the door-opening position (as shown in fig. 9 and 10), the pressing member 151 is received in the recess 133 of the trigger 115, the trigger 115 does not trigger the door-closing detection unit 138 via the pressing member 151, and if the trigger 115 is located at the door-closing position (as shown in fig. 4 and 5), the pressing member 151 is offset from the recess 133 and abuts against the side surface 132, so that the triggering member 115 triggers the door closing detection unit 138 by means of the pressing member 151.

The latch control device 10 is secured to a door frame 175 by first passing two adjustment screws 38 through two adjustment holes 28 of the assembly 20 and into the door frame 175, further locking each adjustment screw 38 after the front adjustment latch control device 10, which has not yet locked the two adjustment screws 38, is in place relative to the latch 173 of a door latch 171 on a door 176, and then passing three set screws 40 through circular positioning holes 30 and into the door frame 175, thus ensuring that the latch control device 10 does not displace relative to the door frame 175 during use.

Referring to fig. 1, the door latch control device 10 includes a housing 153, and the housing 153 includes an opening 155 extending from an outer end surface to a side L-shape. The housing 153 is fixed to the assembly 20, the opening 155 is aligned with the detecting module 88, and only the bracket 90 of the detecting module 88 and the outer end 119 of the triggering member 115 are located in the opening 155 (as shown in fig. 3), when the locking member 42 is located at the locking position (as shown in fig. 4), the locking portion 48 of the locking member 42 closes the side of the opening 155, and when the locking member 42 is located at the unlocking position (as shown in fig. 9), the locking portion 48 of the locking member 42 does not close the side of the opening 155.

Referring to fig. 4 to 6, for convenience of description, it is assumed that the door 176 is in a closed state, and the two driving devices 84 are assembled in a normally closed position, in such a state that the latch 173 of the door lock 171 is located in the opening 155, the latch 173 presses the triggering member 115 to be in the closed position (as shown in fig. 4 and 5), so that the door closing detection unit 138 is triggered, and thus the door is detected to be in the closed state, and further, the locking member 42 is located in the locked position, and the two driving devices 84 are not energized, so that the two limiting members 86 are located in the blocking position (as shown in fig. 5), so that the two positioning members 62 are located in the engaging position and engaged with the two engaging ends 46 of the locking member 42 (as shown in fig. 6), and the two limiting members 86 are aligned with the first ends 64 of the corresponding positioning members 62 (as shown in fig. 5), the locking member 42 is further restricted from pivoting from the locking position to the unlocking position (as shown in fig. 6), so that the door latch control device 10 is set to the locking state, and thus the door latch 173 of the door lock 171 is restricted in the latch hole 91, and further the door 176 cannot be opened.

To open the door 176, the door latch control device 10 can be set to the unlocked state by using, for example, an access card, so that the two driving devices 84 are powered to move the limiting members 86 from the blocking position (shown in fig. 5 and 6) to the unblocking position (shown in fig. 7 and 8), and the locking member 42 is allowed to pivot from the locking position to the unlocking position when the door latch control device 10 is set to the unlocking state, so that the door 176 can be directly pushed so that the door latch 173 presses the locking member 48 to pivot the locking member 42 (shown in fig. 8) without retracting the door latch 173 of the door lock 171, and the two positioning members 62 pivot from the engaging position to the unblocking position, and the two engaging ends 46 of the locking member 42 disengage from the second ends 66 of the two positioning members 62 (shown in fig. 8), so that the locking member 42 pivots from the locking position closing the opening 155 to the unlocking position without closing the opening 155 (shown in fig. 9), further, the latch 173 of the door lock 171 is disengaged from the latch hole 91 of the door latch control device 10, and the door 176 is allowed to be opened.

After the latch 173 of the door lock 171 is completely disengaged from the locking member 42, the return spring 54 biases the locking member 42 to return to the locking position (as shown in fig. 11), and the driving devices 84 are de-energized, so that the restricting members 86 return to the blocking position, and the locking member 42 is again restricted in the locking position from being displaced toward the unlocking position. If the door 176 is to be closed when the locking member 42 is in the locking position, the latch 173 of the door lock 171 is pressed by the locking portion 48 of the locking member 42 and retracted until the door 176 is completely closed, and the latch 173 of the door lock 171 is inserted into the latch hole 91, so that the door 176 is locked again.

Referring to fig. 12, it is assumed that the two driving devices 84 are assembled in a normally open position, such that when each driving device 84 is not energized, the two limiting members 86 are in the non-blocking position, allowing the locking member 42 to pivot from the locking position to the unlocking position. Referring to fig. 13, when the two driving devices 84 are assembled in the normally open position and are energized, the two limiting members 86 are displaced to the blocking position, and the locking member 42 is not allowed to pivot from the locking position to the unlocking position.

The door latch control device 10 of the present invention can be controlled by electronic means or techniques such that a conventional mechanical door lock can be used with the door latch control device 10 of the present invention and access control can be performed by electronic means or techniques.

The detecting device 88 can be used to detect whether the latch 173 of the door lock 171 is actually located in the latch hole 91, so as to reduce the malfunction of the door latch control device 10.

While the basic teachings of the present invention have been described, numerous extensions and variations will be apparent to those of ordinary skill in the art. For example, the locking member 42 may include only one engaging end 46 and one positioning member 62 engaged with the engaging end 46, such that the positioning member 62 can still be used to limit the locking member 42 from being pivoted from the locking position to the unlocking position.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An electric door latch control device comprising:

an assembly member comprising two pivoting seats spaced apart from each other, each pivoting seat comprising a first pivoting portion, and one of the two pivoting seats further comprising a second pivoting portion spaced apart from the first pivoting portion;

a housing mounted on an outer side of the assembly, the housing including an opening;

the locking piece is pivoted with the assembly piece and comprises two pivot parts which are mutually separated and a locking part which extends between the two pivot parts, one of the two pivot parts comprises a clamping end, the two pivot parts of the locking piece are respectively pivoted with the first pivot parts of the two pivot seats, the pivot part comprising the clamping end is pivoted with the pivot seat comprising the second pivot part, and the locking piece can be pivoted to a locking position where the locking part closes the opening or an unlocking position where the locking part opens the opening;

the positioning piece is pivoted with the second pivoting part of the pivoting seat and comprises a first end and a second end, the positioning piece can be pivoted to a clamping position at which the second end is clamped with the clamping end of the locking piece or a non-clamping position at which the second end is separated from the clamping end, when the locking piece is positioned at a locking position, the positioning piece is positioned at the clamping position, and when the locking piece is positioned at an unlocking position, the positioning piece is positioned at the non-clamping position;

a driving device fixed on the assembly;

the limiting piece can be driven by the driving device to be combined with the driving device and can be displaced to a blocking position at which the first end of the positioning piece is clamped or a non-blocking position at which the first end of the positioning piece is not clamped;

when the limiting piece is positioned at the blocking position, the positioning piece is positioned at the clamping position and the locking piece is positioned at the locking position, the locking piece is not allowed to pivot from the locking position to the unlocking position,

when the limiting piece is located at the non-blocking position, the positioning piece is located at the clamping position, and the locking piece is located at the locking position, the locking piece is allowed to pivot from the locking position to the unlocking position.

2. The electric door latch control device according to claim 1, further comprising:

a door opening detection unit mounted on the assembly;

a passive member pivotally coupled with the locking member, the passive member being configured to trigger the door opening detection unit;

when the locking piece is located at the locking position, the driven piece triggers or does not trigger one of the door opening detection units,

when the locking piece is positioned at the unlocking position, the driven piece triggers or does not trigger the other one of the door opening detection units.

3. The electric door latch control device according to claim 2, further comprising:

a pushing member, the assembly further comprising a joint seat including a moving hole for movably receiving the pushing member, the door opening detection unit being mounted on the joint seat and aligned with the pushing member, the driven member including a surface facing the door opening detection unit and a groove formed on the surface;

when the locking piece is positioned at the locking position, the groove of the driven piece is aligned with the pushing piece, the pushing piece does not trigger the door opening detection unit,

when the locking piece is located at the unlocking position, the groove of the driven piece is staggered with the pushing piece, and the pushing piece is supported by the surface of the driven piece to move and trigger the door opening detection unit.

4. The electric door latch control device according to claim 3, further comprising:

and one of the first shafts comprises a linkage end, each first shaft is respectively combined with the two pivot parts of the locking piece to pivot together, each first shaft is respectively pivoted with the first pivot part of the pivoting seat, and the linkage end of the first shaft with the linkage end is combined with the driven piece to pivot together.

5. The electric door latch control device according to claim 1, further comprising a detection module, the detection module comprising:

the bracket is fixedly arranged on the assembly part and positioned between the two pivoting seats, and comprises an assembly wall;

a trigger pivotally connected to the assembly wall of the frame, the trigger including an inner end and an outer end, the trigger being capable of pivoting to a closed door position or an open door position;

a door closing detection unit mounted on a side of the assembly wall, an inner end of the trigger being configured to trigger the door closing detection unit;

when the trigger piece is located at the door closing position, the inner end of the trigger piece triggers or does not trigger one of the door closing detection units,

when the trigger piece is located at the door opening position, the inner end of the trigger piece triggers or does not trigger the other one of the door closing detection units.

6. The electric door latch control device according to claim 5, further comprising:

the assembly wall further comprises a convex part formed on the inner surface and a pivot groove extending from the outer surface to the end surface of the convex part, the convex part further comprises a movable hole extending from the outer side surface to the pivot groove, the trigger part further comprises a side surface and a concave part formed on the side surface and located at the inner end, the trigger part is pivoted in the pivot groove, the outer end of the trigger part is located on the outer side of the outer surface, and the pressing part is movably accommodated in the movable hole and abuts against the side surface of the trigger part;

when the trigger piece is located at the door closing position, the concave part and the pressing piece are staggered, the pressing piece triggers the door closing detection unit,

when the trigger piece is located at the door opening position, the pressing piece moves into the concave part, and the door closing detection unit is not triggered.

7. The electric door latch control device according to claim 1, wherein the locking part of the locking member and the assembly member are substantially perpendicular to each other when the locking member is in the locking position, and an included angle between the locking part of the locking member and the assembly member is between 150 ° and 180 ° when the locking member is in the unlocking position.