EP2463464A2

EP2463464A2 - Lock device with lock tongue

Info

Publication number: EP2463464A2
Application number: EP11192314A
Authority: EP
Inventors: Min Yang
Original assignee: Guli Security Products Ltd
Current assignee: Guli Security Products Ltd
Priority date: 2010-12-08
Filing date: 2011-12-07
Publication date: 2012-06-13
Also published as: EP2463464A3; CN201902055U

Abstract

A lock device with lock tongue is disclosed. The lock device with lock tongue includes a base, a lock tongue rotatably disposed on the base, a braking member rotatably disposed on the base, a protecting tongue rotatably disposed on the base, and a first elastic member connected to the protecting tongue and the braking member. The braking member includes a resisting arm, the lock tongue includes a stopper portion, when the lock tongue is in a locked state, the protecting tongue is rotated to deform the first elastic member, and the first elastic member rotates the braking member, such that the resisting arm of the braking member resists the stopper portionto fix the lock tongue.

Description

TECHNICAL FIELD

The present disclosure relates to lock devices, and particularly, to a lock device with lock tongue.

BACKGROUND OF THE INVENTION

Lock devices are widely used in various fields, such as doors, windows, fire equipments, et al.. The lock device with lock tongue is more popular, because they are convenient to be locked or unlocked. However, even in a locked state, the lock device with lock tongue is easily unlocked by drawing the lock tongue from the outside or shaking the lock tongue, such that the security of the lock device is poor.

SUMMARY OF THE INVENTION

The present disclosure provides a lock device with lock tongue includes a base, a lock tongue rotatably disposed on the base, a braking member rotatably disposed on the base, a protecting tongue rotatably disposed on the base, and a first elastic member connected to the protecting tongue and the braking member. The braking member includes a resisting arm, the lock tongue includes a stopper portion, when the lock tongue is in a locked state, the protecting tongue is rotated to deform the first elastic member, and the first elastic member rotates the braking member, the resisting arm of the braking member resists the stopper portion to fix the lock tongue.
When the lock tongue is in a locked state, the resisting arm of the braking member resists the stopper portion of the lock tongue to fix the lock tongue, so it is difficult to unlock the lock tongue by drawing the lock tongue from the outside or shaking the lock tongue, such that the security of the lock device is good.
Preferably, the lock tongue further comprises a receiving portion adjacent to the stopper portion, the resisting arm is received in the receiving portion when the lock device is unlocked.
Preferably, the lock device with lock tongue further comprises a turning member rotatably disposed on the base, wherein the turning member comprises a first turning protrusion to rotate the lock tongue and a second turning protrusion to rotate the braking member.
Preferably, the lock device with lock tongue further comprises a first shaft passing through the base, a second shaft passing through the base, and a third shaft passing through the base, wherein the lock tongue and the protecting tongue are rotatably sleeved on the first shaft, and the turning member and the braking member are rotatably sleeved on the second shaft and the third shaft respectively.
Preferably, the first elastic member is a torsion spring sleeved on the first shaft, the protecting tongue comprises a fixing portion, and the braking member comprises a talon, two free ends of the first elastic member respectively resist the fixing portion and the talon.
Preferably, the second elastic member is a torsion spring sleeved on the first shaft, the lock tongue comprises a turning pin, two free ends of the second elastic member respectively resist the turning pin and the third shaft.
Preferably, the protecting tongue comprises a transmission portion, and the turning pin is capable of turning the transmission portion.
Preferably, the third elastic member is a torsion spring sleeved on the second shaft, two free ends of the third elastic member respectively resist turning member and the third shaft.
Preferably, the lock tongue further comprises a resisting protrusion, and the turning member is capable of turning the resisting protrusion.
Preferably, the lock device with lock tongue further comprises a handle rotatably disposed on the base, wherein the handle is capable of rotating the turning member.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded, isometric view of one embodiment of a lock device with lock tongue;
FIG. 2 is an assembled, isometric view of the lock device with lock tongue of FIG. 1;
FIG. 3 is similar to FIG. 2, but viewed from another aspect;
FIG. 4 is similar to FIG. 2, but shows the lock device with lock tongue in using state;
FIG. 5 is a cross-sectional view of the lock device with lock tongue of FIG. 4, taken along line V-V;
FIG. 6 is a cross-sectional view of the lock device with lock tongue of FIG. 4, taken along line VI-VI;
FIG. 7 is similar to FIG. 2, but shows the lock device with lock tongue in other using state.
FIG. 8 is a cross-sectional view of the lock device with lock tongue of FIG. 7, taken along line VIII-VIII; and
FIG. 9 is a cross-sectional view of the lock device with lock tongue of FIG. 7, taken along line IX-IX.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Many aspects of the disclosure can be better understood in the following embodiments with reference to the accompanying drawings.
Referring to FIGS. 1 and 2, an embodiment of a lock device 100 includes a base 110, a lock tongue 120, a protecting tongue 130, a braking member 140, a turning member 150, a first shaft 161, a second shaft 163, a third shaft 165, a first elastic member 171, a second elastic member173, a third elastic member 175, and a handle 180. The lock tongue 120 and the protecting tongue 130 are rotatably sleeved on the fist shaft 161. The braking member 140 is rotatably sleeved on the second shaft 163. The first elastic member 171 is connected to the protecting tongue 130 and the braking member 140. The second elastic member 173 is connected to the third shaft 160 and the tuning member 150. The handle 180 is rotatably disposed on the base 110, and capable of rotating the tuning member 150.
The base 110 includes a main body 111, and a bracket 112 fixed to the main body 111. The bracket 112 includes a first side plate 1121, and two second side plates 1123 connected to opposite ends of the first side plate 1121, respectively. The first side plate 1121, two second side plates 1123, and the main body 111 cooperatively define a receiving space for the lock tongue 120, the protecting tongue 130, the braking member 140 and the tuning member 150. The first side plate 1121 defines a circular through hole (not labeled) for the handle 180. One of the second side plates 1123 defines a pivoting hole (not labeled), and a first guiding hole 11231, the pivoting hole is configured for the first shaft 161, the second shaft 163, and the second shaft 165 passing through, and a first guiding hole 11231 passing through. The other second side plates 1123 defines a pivoting hole (not labeled), and a second guide hole 11232, the pivoting hole is configured for the first shaft 161, the second shaft 163, and the second shaft 165 passing through .
The lock tongue 120 includes a main portion 121, a receiving portion 123 defining on one side of the main portion 121, a stopper portion 125, a resisting protrusion 127, and a turning pin 129. The stopper portion 125 is disposed on the same side of the main portion 121 with the receiving portion 123, and adjacent to the receiving portion 123. The resisting protrusion 127 are formed at an end of the main portion 121 adjacent to the stopper portion 125. The main portion 121 defines a pivoting hole (not labeled) at an end adjacent to the resisting protrusion 127. The tuning pin 129 is fixed on one side of the resisting protrusion 127.
The protecting tongue 130 is substantially U-shaped having two supporting arms. Each supporting arm defines a pivoting hole (not labeled) at a free end for the first shaft 161 passing through. One of the supporting arms forms a transmission portion 131 at the free end thereof, the other supporting arm forms a fixing portion 132 substantially perpendicularly extending from a middle portion of the supporting arm, and an abutting portion 133 at the free end.
The braking member 140 is substantially C-shaped. Each end of the braking member 140 defines a pivoting hole (not labeled) for the second shaft 163 passing through. The braking member 140 forms a resisting arm 141 at an end, and a talon 143 substantially perpendicularly extending from a side of the resisting arm 141 for resisting the first elastic member 171. The resisting arm 141 may be received in the receiving portion 123 of the lock tongue 120.
The turning member 150 includes a main portion 151, two first turning protrusions 153, and two second turning protrusions 155. In the illustrated embodiment, the main portion 151 is substantially U-shaped having two supporting arms. Each supporting arm defines a pivoting hole (not labeled) at a free end for the second shaft 165 passing through. The two first turning protrusions 153 are formed on an outer side of a bottom of the main portion 151, and the two first turning protrusions 153 are spaced apart. Each turning protrusions 155 is formed at a middle portion of a supporting arm of the main portion 151.
In the illustrated embodiment, the first elastic member 171, the second elastic member 173, and the third elastic member 175 are torsion springs. The first elastic member 171 is configured to keep the lock tongue 120 protruding out. The second elastic member 173 is configured to keep the protecting tongue 130 protruding out. The third elastic member 175 is configured to keep the turning member 150 turning up.
The handle 180 forms a rotary shaft 181 at an end of the handle 180. The handle 180 defines an annular sliding slot 183 surrounding the rotary shaft 181. The handle 180 further forms an abutting protrusion 185 received in the sliding slot 183. The two supporting arms of the main portion 151 of the turning member 150 may slide along the sliding slot 183, or abut the abutting protrusion 151 to rotate together with the handle 180.
Referring to FIGS. 2 and 3, to assemble the lock device 100, the rotary shaft 181 of the handle 180 is inserted into the circular through hole of the first side plate 1121. The braking member 140 is engaged with the base 110 by passing the second shaft 163 through the pivoting holes defined at the braking member 140 and the two second side plates 1123 of the base 110, such that the braking member 140 is capable of rotating relative to the base 110. The turning member 150 is engaged with the base 110 by passing the third shaft 165 through the pivoting holes respectively defined in the turning member 150 and the base 110, and the third elastic member 175, such that the tuning member 150 is capable of rotating relative to the base 110. Two free ends of the third elastic member 175 resist the third shaft 165 and one of the supporting arms of the main portion 151 and the turning member 150 respectively to keep the turning member 150 turning up. The lock tongue 120 and the protecting tongue 130 are engaged with the base 110 by passing the first shaft 161 through the pivoting holes defined at the base 110, the lock tongue 120, and the protecting tongue 130, the first elastic member 171 and the second elastic member 173, such that the lock tongue 120 and the second tongue 130 are capable of rotating relative to the base 110. The lock tongue 120 is disposed at an inner side of the protecting tongue 130, and thereby protected by the protecting tongue 130. The fixing portion 132 of the protecting tongue 130 is slidably inserted in the first guide hole 11231. Two free ends of the second elastic member 173 resist the third shaft 165 and the transmission portion 131 of the protecting tongue 130. The turning pin 129 of the locking tongue 120 is slidably inserted in the second guide hole 11232. Two free end of the first elastic member 171 resist the talon 143 of the braking member 140, and the fixing portion 132 of the protecting tongue 130, respectively.
Referring to FIGS. 4 through 6, the lock tongue 120 protrudes out due to an elastic force generated by the second elastic member 173. In order to lock the lock device 100, the protecting tongue 130 rotates to retract the lock tongue 120. Then, the abutting portion 133 of the protecting tongue 130 is away from the resisting arm 141 of the braking member 140, the resisting arm 141 of the braking member 140 uplifts due to elastic force generated by the first elastic member 171, and the resisting arm 141 of the braking member 140 thereby resists the stopper portion 125 of the lock tongue 120, such that the lock tongue 120 is kept in a steady state.
Referring to FIGS. 7 through 9, in order to unlock the lock device 100, the handle 180 rotates relative to the base 110, and the turning member 150 rotates together with the handle 180, the second turning protrusion 155 of the turning member 150 resists and thereby uplifts the braking member 140, such that the resisting arm 141 of the braking member 140 rotates downward, thereby apart from the stopper portion 125 of the lock tongue 120, and is finally received in the receiving portion 123 of the lock tongue 120, then the lock tongue 120 is released from being braked by the braking member 140. The transmission portion 131 of the protecting tongue 130 retracts and is received in the base 110 with the lock tongue 120 driven by the turning pin 129, such that the lock device 100 is unlocked successfully.
When the lock tongue 120 is in a locked state, the resisting arm 141 of the braking member 140 resists the stopper portion 125 of the lock tongue 120 to fix the lock tongue 120, so it is difficult to unlock the lock tongue 120 by drawing the lock tongue 120 from the outside or shaking the lock tongue 120, such that the security of the lock device 100 is good.
It should be pointed out that the first elastic member 171, the second elastic member 173, and the third elastic member 175 may be other type elastic mechanisms, such as a set of extension springs, rather than torsion springs.
It should be emphasized that the above-described embodiments of the present invention, particularly, any preferred embodiments, are merely possible examples of implementations, merely set forth for a clear understanding of the principles of the invention. Many variations and modifications may be made to the above-described embodiment(s) of the invention without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.

Claims

A lock device with lock tongue, comprising:
a base;

a lock tongue rotatably disposed on the base and comprising a stopper portion;

a braking member rotatably disposed on the base and comprising a resisting arm;

a protecting tongue rotatably disposed on the base; and

a first elastic member connected to the protecting tongue and the braking member, when the lock tongue is in a locked state, the protecting tongue is rotated to deform the first elastic member, and the first elastic member rotates the braking member, such that the resisting arm of the braking member resists the stopper portion to fix the lock tongue.
The lock device with lock tongue of claim 1, wherein the lock tongue further comprises a receiving portion adjacent to the stopper portion, the resisting arm is received in the receiving portion when the lock device is unlocked.
The lock device with lock tongue of claim 1 or 2, further comprising a turning member rotatably disposed on the base, wherein the turning member comprises a first turning protrusion to rotate the lock tongue and a second turning protrusion to rotate the braking member.
The lock device with lock tongue of claims 1 to 3, further comprising a first shaft passing through the base, a second shaft passing through the base, and a third shaft passing through the base, wherein the lock tongue and the protecting tongue are rotatably sleeved on the first shaft, and the turning member and the braking member are rotatably sleeved on the second shaft and the third shaft respectively.
The lock device with lock tongue of claims 1 to 4, wherein the first elastic member is a torsion spring sleeved on the first shaft, the protecting tongue comprises a fixing portion, and the braking member comprises a talon, two free ends of the first elastic member respectively resist the fixing portion and the talon.
The lock device with lock tongue of claims 1 to 5, wherein the second elastic member is a torsion spring sleeved on the first shaft, the lock tongue comprises a turning pin, two free ends of the second elastic member respectively resist the turning pin and the third shaft.
The lock device with lock tongue of claims 1 to 6, wherein the protecting tongue comprises a transmission portion, and the turning pin is capable of turning the transmission portion.
The lock device with lock tongue of claims 1 to 7, wherein the third elastic member is a torsion spring sleeved on the second shaft, two free ends of the third elastic member respectively resist turning member and the third shaft.
The lock device with lock tongue of claims 1 to 8, wherein the lock tongue further comprises a resisting protrusion, and the turning member is capable of turning the resisting protrusion.
The lock device with lock tongue of claims 1 to 9, further comprising a handle rotatably disposed on the base, wherein the handle is capable of rotating the turning member.