TWI433378B - Locking mechanism and an electronic device having the same - Google Patents

Description

Locking mechanism and electronic device having the same

The present invention relates to a locking mechanism and an electronic device having the same, and more particularly to a locking mechanism having a safety lock function and an electronic device having the same.

In the battery module locking device of the electronic device disclosed in the Patent No. M300373 (Application No. 94217829), the hook of the battery module passes through the through hole of the fixing frame and is caught in the fixing hole of the fixing member. The fixing hole is hooked to the side edge of the reset element through the hook, so that the battery module is locked in the fixing frame. To disassemble the battery module, push the operating button of the fixing member so that the fixing hole of the fixing member corresponds to the hook, and then pull out the battery module toward the outside of the notch to remove the battery module from the fixing frame.

However, in the patent case, since the operation push button of the fixing member exposes the outside of the fixing frame, the structural design is easy to be caused by the user accidentally touching the push button or the operating push button is affected by the external force, thereby causing the fixing member to slide to the fixed position. The hole is positively corresponding to the position of the hook, so that the hook of the battery module is easily slid out through the fixing hole of the fixing member and the through hole of the fixing frame, so that the battery module is detached from the fixing frame.

An object of the present invention is to provide a locking mechanism having a safety lock function to prevent erroneous operation, which is simple in structure and can reduce assembly man-hours and manufacturing costs.

Another object of the present invention is to provide an electronic device having a locking mechanism having a safety lock function to prevent erroneous operation, and the locking mechanism has a simple structure and can reduce assembly man-hours and manufacturing costs.

The object of the present invention and the prior art are solved by the following technical means. The locking mechanism according to the present invention is adapted to be locked with a plug component having a card hole, and the locking mechanism comprises a casing. One card, one lock and one lock button.

The housing is formed with a perforation corresponding to the position of the hole, and the housing includes a limiting stopper spaced apart from the inner side of the perforation; the clamping member is disposed on the housing and slidable relative to the housing, and the clamping member is disposed through the perforation And the unlocking card is fastened to the card hole, and the latching member is formed with a through hole; the locking member is disposed on the latching member and corresponding to the position of the through hole, and the locking member can be unlocked and locked to the limiting stopper; The locking button is disposed in the through hole of the latching member and engages with the locking member, and the releasing button can drive the locking member to rotate relative to the latching member to disengage from the latching of the limiting stopper.

The object of the present invention and solving the prior art problems can be further achieved by the following technical means.

The locking mechanism further includes a resilient biasing member disposed on the housing for biasing the locking member toward the perforating direction, the resilient biasing member including a contact protrusion spaced from the limit stop, the locking member including a latch The first latching plate body of the limit stop and a second latching plate body that is latched to the contact convex portion.

The contact protrusion has an arc shape.

The second latching plate body is formed with a card slot for engaging the contact protrusion, and an arcuate contact surface which can abut against the contact protrusion to guide it to the card slot.

The housing further includes at least one protrusion and at least one spaced apart from the protrusion a blocking piece, the elastic biasing element further comprises at least one elastic arm portion and at least one connecting portion, one end of the elastic arm portion is connected to the contact convex portion and abuts against the first blocking piece, and the socket portion is connected to the other end of the elastic arm portion And sleeved on the stud.

The housing further includes a second blocking piece spaced from the first blocking piece, and the elastic biasing element further includes a locking portion formed on the socket portion and abutting against the second blocking piece.

The housing includes two protrusions, and two first blocking pieces respectively spaced apart from the two protruding columns. The elastic biasing element comprises two elastic arm portions and two socket portions respectively connected to opposite ends of the contact convex portions, one end of each elastic arm portion The connecting protrusions are connected to the first blocking pieces, and the socket parts are connected to the other ends of the elastic arm parts and are sleeved on the respective protrusions.

The through hole of the clamping member has a circular shape, and the locking member is formed with a locking hole corresponding to the position of the through hole, and the housing is formed with a mounting hole corresponding to the position of the through hole, the release button includes a pressing portion, and the second protruding portion is The two hooks are disposed on the mounting hole, the through hole and the engaging hole and are fastened to the locking member.

The housing is further formed with a lateral guide groove for sliding the pressing portion, and a diagonal guide groove communicating with the lateral guide groove for receiving the pressing portion.

An electronic device having a locking mechanism according to the present invention includes a plug component and a locking mechanism. The plug component has a card hole; the locking mechanism comprises a casing, a latching member, a locking component and a release button. The housing is formed with a perforation corresponding to the position of the hole, and the housing includes a limiting stopper spaced apart from the inner side of the perforation; the clamping member is disposed on the housing and slidable relative to the housing, and the clamping member is disposed through the perforation And the unlockable card is stuck in the card hole, and the card The clamping member is formed with a through hole; the locking member is disposed on the clamping member and corresponds to the position of the through hole, and the locking member is unlocked to be engaged with the limiting stopper; the releasing button is threaded through the through hole of the clamping member and Engaged with the lock, the release button can drive the lock to rotate relative to the latch away from the latch of the limit stop.

According to the above technical means, the advantages and functions of the electronic device with the locking mechanism of the present invention are that, through the design of the locking mechanism, the safety lock function can be provided to prevent misoperation, so that the plug component can be firmly locked on the casing. . Moreover, the simple structure of the locking mechanism can reduce assembly man-hours and manufacturing costs.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the accompanying drawings. The technical means and functions of the present invention for achieving the intended purpose can be more deeply and specifically understood by the description of the specific embodiments. However, the drawings are only for the purpose of reference and description, and are not intended to limit the invention. .

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

As shown in FIG. 1 , it is a first embodiment of an electronic device having a locking mechanism according to the present invention. The electronic device 100 includes a plug component 1 and a locking mechanism 2 . In this embodiment, the electronic device 100 is Taking a notebook computer as an example, the plug component 1 is exemplified by a battery. Of course, the electronic device 100 can also be a tablet computer, a mobile phone or a personal digital assistant, and the plug component 1 can also be, for example, a CD player or a hard disk.

As shown in FIG. 1 and FIG. 2, the locking mechanism 2 includes a housing 21 and a card. The device 22, a lock fastener 23, and a release button 24. The housing 21 is formed with a receiving slot 211 for receiving the plug component 1 and a through hole 212 communicating with the receiving slot 211. The through hole 212 of the housing 21 can be coupled to a latching hole 11 of the plug component 1. Correspondingly, the housing 21 further includes a limit stop 213 spaced apart from the inside of the through hole 212. The latching member 22 is disposed on the housing 21 and slidable relative to the housing 21 . The latching member 22 is disposed through the through hole 212 of the housing 21 and can be unlocked to the latching hole 11 of the plug component 1 . Therefore, the plug component 1 can be fixed in the accommodating groove 211. In addition, the latching member 22 is formed with a through hole 221, and the locking member 23 is disposed on the latching member 22 and corresponding to the position of the through hole 221, and the locking member 23 can be unlocked to the limit stop 213 of the housing 21. . The release button 24 is inserted through the through hole 221 of the latching member 22 and engaged with the locking member 23, and the unlocking button 24 partially exposes the bottom end of the housing 21 for the user to press, thereby releasing the release lock The button 24 is such that the release button 24 can rotate the lock 23 relative to the latch member 22 to disengage from the latch of the limit stop 213.

The structure and operation mode of the locking mechanism 2 will be described in detail below. In this embodiment, the housing 21 includes two guide rails 214 protruding from the inner surface and spaced apart from each other. The guide rails 214 are elongated and are oriented in the left and right direction. Laterally extending, the front and rear ends of the latching member 22 abut against the two guide rails 214, whereby the latching member 22 can be restrained from sliding relative to the housing 21 in the left-right direction. The housing 21 is formed with a mounting hole 215 corresponding to the position of the through hole 221 of the latching member 22. The locking member 23 is formed with a locking hole 231 corresponding to the position of the through hole 221, and the engaging hole 231 has a square shape. The release button 24 includes an outer surface of the housing 21 The pressing portion 241 and the two hooks 242 protruding from the pressing portion 241 each have a connecting arm portion 243 connected to the pressing portion 241 and a protruding end portion of the connecting arm portion 243 Hook 244. Each of the hooks 242 of the release button 24 is sequentially inserted through the mounting hole 215 of the housing 21, the through hole 221 of the latching member 22, and the engaging hole 231 of the locking member 23, and the connecting arm portion of each of the hooks 242 is transmitted. The latch 243 is engaged with the latching hole 231 of the fastener 23, and the hook portion 244 of each latch 242 is snapped onto the latch 23 so that the latching knob 24 can be engaged with the latching member 22 and the latching member 23. Thereby, the user can slide the latching member 22 and the locking member 23 relative to the housing 21 by pushing the pressing portion 241 of the release button 24 to disengage the latching member 22 from the latching hole 11 of the plug component 1.

The locking mechanism 2 further includes a resilient biasing member 25 disposed on the housing 21 for biasing the locking member 23 toward the through hole 212. Since the releasing button 24 passes the locking hook 242, the locking member 22 and the locking member 23 are coupled. Engaged together, therefore, the resilient biasing member 25 can provide the resilient force of the lock 23, the latch 22 and the release button 24. In the embodiment, the locking member 23 includes a first latching plate body 232 on the rear side of the latching hole 231, and a second latching plate body 233 on the right side of the latching hole 231. The second latching plate body The 233 is formed with a card slot 234. The elastic biasing member 25 is made of a metal material and includes a contact protrusion 251 spaced apart from the limit stop 213. The contact protrusion 251 is engaged with the slot 234 of the fastener 23. The housing 21 further includes two protrusions 216 protruding from the inner surface and spaced apart from each other, and two first blocking pieces 217 protruding from the inner surface and spaced apart from each other, and each of the first blocking pieces 217 and each of the protruding columns 216 interval. The elastic biasing member 25 further includes two elastic arms respectively connected to opposite ends of the front and rear of the contact convex portion 251 The portion 252 and the second socket portion 253 are connected to the contact protrusion portion 251 at one end of each of the elastic arm portions 252, and each of the elastic arm portions 252 abuts against each of the first blocking pieces 217. Each of the sleeve portions 253 is arc-shaped and connected to the other end of each of the elastic arm portions 252, and is sleeved to each of the protrusions 216 through the sleeve portions 253, so that the elastic biasing member 25 can be assembled quickly and conveniently in the shell. On body 21.

Since the through hole 221 of the latching member 22 is circular, the connecting arm portion 243 of the clasp 242 of the release button 24 can be allowed to rotate in the through hole 221, and the connecting arm portion 243 does not drive the latch when rotated. The member 22 is rotated, whereby the release button 24 can separately drive the lock 23 to rotate relative to the latch member 22, so that the lock member 23 can be rotated until the first latching plate body 232 is locked to the limit stop 213, and The two latching plate body 233 is locked at the position of the contact convex portion 251 of the elastic biasing member 25, and can block the lock member 23, the latching member 22 and the release button by the blocking of the limiting stopper 213 and the contact convex portion 251. The slider 24 slides relative to the housing 21 so that the latch member 22 can be held in the position of the card opening 11 of the plug member 1.

As shown in FIG. 3, FIG. 4 and FIG. 5, a spring hook 222 of the latching member 22 passes through the through hole 212 of the housing 21 and extends into the receiving slot 211 by the elastic force of the elastic biasing member 25. . When the plug component 1 is to be inserted into the receiving slot 211 of the housing 21, the plug component 1 is inserted into the receiving slot 211 in the direction of the arrow I. When the plug component 1 abuts against a slope 223 of the hook 222. When the latching member 1 applies the lateral component of the inclined surface 223, the latching member 22 is pushed in the direction of the arrow II. When the latching member 22 is retracted, the latching member 23 and the unlocking button 24 are simultaneously moved, so that the latching member is locked. The second latch body 233 of 23 compresses the resilient biasing member 25. The component to be inserted 1 is moved to the card hole 11 and the through hole 212 When the position is aligned, the elastic member 25 provides the latching member 22, the locking member 23 and the release button 24 to restore the elastic force, so that the hook 222 of the latching member 22 can pass through the through hole 212 and be stuck in the hole 11 At this time, the latching member 22 locks the plug member 1 to the housing 21.

As shown in FIG. 5 and FIG. 6, the outer surface of the housing 21 is further formed with a lateral guiding groove 218 for sliding the pressing portion 241 of the release button 24, and a communicating with the lateral guiding groove 218 for receiving the pressing portion 241. The inclined guide groove 219 is disposed through the lateral guide groove 218. The user can pull the pressing portion 241 of the release button 24 in the direction of the arrow II by the outside of the housing 21, so that the pressing portion 241 slides along the lateral guiding groove 218 for a certain distance. The hook 222 of the latch member 22 can be moved away from the latching hole 11 of the plug member 1 to release the locked state between the latch member 22 and the plug member 1. In addition, through the design of the oblique guide groove 219, the user can recognize the direction in which the pressing portion 241 of the release button 24 is pulled by the outside of the housing 21, so that the locking member 23 can be locked to the limit stop 213 and elastic. The contact protrusion 251 of the biasing element 25.

As shown in FIG. 7 and FIG. 8, when the lock member 23 is to be engaged with the stopper 213 and the contact convex portion 251 of the elastic biasing member 25, the pressing portion 241 of the release button 24 is inclined in the direction of the arrow III. When the direction of the guide groove 219 is pulled, since the contact protrusion 251 of the elastic biasing member 25 is engaged in the slot 234, the user needs to apply a certain force to smoothly rotate the pressing portion 241 of the release button 24. . In this embodiment, the contact protrusion 251 of the elastic biasing member 25 is in an arc shape, and the second latching plate 233 of the locking member 23 has an arcuate contact surface 235, and the arcuate contact surface 235 can be in contact with the convex portion. The portion 251 abuts, and the release button 24 drives the lock 23 to rotate through the second cassette. The curved contact surface 235 of the plate body 233 abuts against the contact convex portion 251, so that the second click plate body 233 can smoothly compress the contact convex portion 251 of the elastic biasing member 25. When the arcuate contact surface 235 of the second latching plate body 233 is separated from the contact convex portion 251, the contact convex portion 251 of the elastic biasing member 25 is reset by the reset elastic force and is locked to the rear side of the second latching plate body 233. At the same time, the first latching plate body 232 of the locking member 23 is also clamped on the limiting stopper 213, and is blocked by the limiting stopper 21 and the contact convex portion 251 of the elastic biasing member 25, so that the locking member 23 and the latch are locked. The member 22 and the release button 24 cannot slide relative to the housing 21, whereby the function of the safety lock can be provided, regardless of whether the pressing portion 241 of the release button 24 is accidentally touched by a user or is affected by an external force, the card member The hook 222 of the retaining member 22 can be securely held in position in the latching opening 11 of the plug member 1 to prevent the plug member 1 from being accidentally released from the receiving recess 211 of the housing 21.

Further, when the state in which the lock member 23 is locked to the limit stopper 213 and the contact convex portion 251 is released, the pressing portion 241 of the release button 24 is rotated in the direction of the arrow III, and the arc contact is transmitted through the second latching plate body 233. When the surface 235 presses the contact protrusion 251 and guides it to a position where it is engaged with the card slot 234, the jam state between the lock 23 and the stopper 213 and the contact protrusion 251 can be released. At this time, the user can press the pressing portion 241 of the release button 24 in the direction of the arrow II (FIG. 6) to drive the hook 222 of the latch member 22 away from the card hole 11 of the plug component 1.

As shown in FIG. 9 and FIG. 10, it is a second embodiment of the electronic device with the locking mechanism of the present invention. The overall structure and operation mode of the electronic device 100 are substantially the same as those of the first embodiment, except that the elastic bias is The structure of the element 25' is slightly different.

In the present embodiment, the number of the protrusions 216 and the first blocking piece 217 of the housing 21 is one, and the number of the elastic arm portions 252 and the socket portions 253 of the elastic biasing member 25' is one. In addition, the housing 21 further includes a second blocking piece 220 spaced apart from the first blocking piece 217. The second blocking piece 220 is spaced apart from the right side of the first blocking piece 217, and the elastic biasing member 25' further includes a sleeve formed on the sleeve. The portion 253 is abutted on the engaging portion 254 of the second flap 220, thereby preventing the contact portion 251 of the elastic biasing member 25' from being pressed by the locking member 23, and the sleeve portion 253 is opposite to the stud 216 turns.

In summary, the electronic device 100 of the two embodiments can provide a safety lock function to prevent erroneous operation through the design of the locking mechanism 2, so that the plug component 1 can be firmly locked on the housing 21. Furthermore, the simple structure of the locking mechanism 2 can reduce assembly man-hours and manufacturing costs, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are still It is within the scope of the patent of the present invention.

〔this invention〕

100‧‧‧Electronic devices

1‧‧‧Dropping components

11‧‧‧Kakong

2‧‧‧Locking mechanism

21‧‧‧ housing

211‧‧‧ accommodating slots

212‧‧‧Perforation

213‧‧‧Limit stop

214‧‧‧rails

215‧‧‧ mounting holes

216‧‧‧Bump

217‧‧‧ first baffle

218‧‧‧ transverse guides

219‧‧‧ oblique guide slot

220‧‧‧second cover

22‧‧‧ Cards

221‧‧‧through hole

222‧‧‧ hook

223‧‧‧Slope

23‧‧‧Lock Firmware

231‧‧‧Card hole

232‧‧‧First card body

233‧‧‧Second card body

234‧‧‧ card slot

235‧‧‧ curved contact surface

24‧‧‧ release button

241‧‧‧ Pressing Department

242‧‧‧ buckle

243‧‧‧Connecting arm

244‧‧‧ hook

25, 25'‧‧‧Elastic biasing element

251‧‧‧Contact convex

252‧‧‧Boom arm

253‧‧‧ Sockets

254‧‧‧ card joint

I, II‧‧‧ arrows

III‧‧‧ arrow

1 is a perspective view of a first embodiment of an electronic device having a locking mechanism of the present invention; FIG. 2 is a partial exploded perspective view of a first embodiment of an electronic device having a locking mechanism of the present invention; A partially enlarged view of the first embodiment of the electronic device of the securing mechanism, illustrating that the hook of the latch member extends into the receiving slot; 4 is a partial enlarged view of a first embodiment of an electronic device having a locking mechanism according to the present invention, illustrating that the plug member pushes the card member to retract; FIG. 5 is a first embodiment of the electronic device having the locking mechanism of the present invention. FIG. 6 is a bottom view of the first embodiment of the electronic device with the locking mechanism of the present invention; FIG. 7 is a lock of the present invention; FIG. 8 is a partial enlarged view of the first embodiment of the electronic device with the locking mechanism of the present invention, illustrating the locking of the lock on the limit stop and the elastic bias 9 is a partial enlarged view of a second embodiment of an electronic device having a locking mechanism of the present invention; and FIG. 10 is a partially enlarged view of a second embodiment of an electronic device having a locking mechanism of the present invention.

100. . . Electronic device

1. . . Plug component

2. . . Locking mechanism

twenty one. . . case

213. . . Limit stop

214. . . guide

twenty two. . . Card assembly

twenty three. . . Lock firmware

244. . . Hook

25. . . Elastic biasing element

251. . . Contact protrusion

252. . . Bomb arm

253. . . Socket

Claims (18)

A locking mechanism adapted to be locked with a plug component having a snap hole, the latching mechanism comprising: a housing formed with a perforation corresponding to the position of the latch, the housing including a spacing in the perforation a latching member on the inner side; a latching member disposed on the housing and slidable relative to the housing, the latching member being disposed through the through hole and releasably locking the card hole, the card The clamping member is formed with a through hole; a locking member is disposed on the locking member and corresponding to the position of the through hole, the locking member can be unlocked to the limiting stop; and a release button is worn The through hole of the latching member is engaged with the locking member, and the releasing button can drive the locking member to rotate relative to the latching member to disengage from the locking member. The locking mechanism according to claim 1, further comprising a resilient biasing member disposed on the housing for biasing the locking member toward the perforating direction, the resilient biasing member including a limit The contact block has spaced contact protrusions, and the lock comprises a first latch body that is latched to the limit stop, and a second latch body that is latched to the contact protrusion. The locking mechanism according to claim 2, wherein the contact protrusion has an arc shape. The locking mechanism of claim 3, wherein the second latching plate body is formed with a card slot for engaging the contact protrusion, and a contact with the contact protrusion is used to Guided to the arcuate contact surface of the card slot. The locking mechanism of claim 4, wherein the housing further comprises at least one post, and at least one first flap spaced from the at least one post, the resilient biasing element further comprising The at least one elastic arm portion is connected to the contact convex portion and abuts against the at least one first blocking piece, and the at least one connecting portion is connected to the at least one elastic arm The other end of the portion is sleeved on the at least one protrusion. The locking mechanism of claim 5, wherein the housing further comprises a second blocking piece spaced from the first blocking piece, the resilient biasing member further comprising a sleeve formed on the sleeve And abuts against the engaging portion of the second flap. The locking mechanism of claim 5, wherein the housing comprises two protrusions, and two first flaps respectively spaced from the two protrusions, the elastic biasing members comprising two respectively connected to The elastic arm portion and the second socket portion of the opposite end of the contact convex portion are respectively connected to the contact convex portion and abut against each of the first blocking pieces, and each of the socket portions is connected to each of the elastic arm portions The other end is sleeved on each of the studs. The locking mechanism of claim 5, wherein the through hole of the latching member has a circular shape, and the locking member is formed with a locking hole corresponding to the position of the through hole, and the housing is formed with the through hole a locking hole corresponding to the hole, the release button includes a pressing portion, and two spaced hooks protruding from the pressing portion, the two hooks are disposed through the mounting hole, the through hole and the card The hole is received and snapped onto the lock. The locking mechanism according to claim 8, wherein the housing is further formed with a lateral guide groove for sliding the pressing portion, and a transverse direction The guide groove is connected to the oblique guide groove which is accommodated by the pressing portion. An electronic device having a locking mechanism, comprising: a plug component having a card hole; and a locking mechanism comprising: a housing formed with a perforation corresponding to the position of the card hole, the housing including a spacer a retaining block located on the inner side of the perforation; a latching member disposed on the housing and slidable relative to the housing, the latching member being disposed through the through hole and releasably locking the latching hole in the latching hole The latching member is formed with a through hole; a locking member is disposed on the latching member and corresponding to the position of the through hole, the locking member can be unlocked to the limit stop; and the unlocking The button is inserted into the through hole of the latching member and engages with the locking member, and the releasing button can drive the locking member to rotate relative to the latching member to disengage from the latching stop. The electronic device with a locking mechanism according to claim 10, wherein the locking mechanism further comprises a resilient biasing member disposed on the housing for biasing the locking member toward the perforating direction. The elastic biasing element includes a contact protrusion spaced from the limit stop, the lock body includes a first latching plate body latched to the limit stop block, and a latching portion of the contact protrusion The second card body. An electronic device having a locking mechanism according to claim 11, wherein the contact protrusion has an arc shape. Electronic device with locking mechanism according to item 12 of the patent application scope The second card body is formed with a card slot for the contact protrusion to be engaged, and an arcuate contact surface that can abut the contact protrusion to guide the card to the card slot. The electronic device with a locking mechanism according to claim 13 , wherein the housing further comprises at least one stud, and at least one first baffle spaced from the at least one stud, the elastic bias The pressing member further includes at least one elastic arm portion and at least one connecting portion, wherein the at least one elastic arm portion is connected to the contact convex portion at one end and abuts against the at least one first blocking piece, and the at least one connecting portion is connected to the The other end of the at least one arm portion is sleeved on the at least one protrusion. The electronic device with a locking mechanism according to claim 14, wherein the housing further comprises a second blocking piece spaced from the first blocking piece, the resilient biasing element further comprising a The socket portion abuts against the engaging portion of the second flap. The electronic device with a locking mechanism according to claim 14, wherein the housing comprises two protrusions, and two first flaps respectively spaced from the two protrusions, the elastic biasing element comprising And a spring arm portion and a second socket portion respectively connected to the opposite ends of the contact protrusions, wherein one end of each of the elastic arm portions is connected to the contact protrusion portion and abuts against each of the first blocking pieces, and each of the socket portions is connected to each The other end of the elastic arm portion is sleeved on each of the protruding posts. The electronic device with a locking mechanism according to claim 14, wherein the through hole of the latching member has a circular shape, and the locking member is formed with a locking hole corresponding to the position of the through hole, and the housing is formed. a mounting hole corresponding to the position of the through hole, the release button includes a pressing portion, and two The two hooks are disposed on the mounting hole, the through hole and the engaging hole and are fastened to the locking member. The electronic device with a locking mechanism according to claim 17, wherein the housing is further formed with a lateral guiding groove for sliding the pressing portion, and a communicating with the lateral guiding groove is provided for The oblique guide groove accommodated by the pressing portion.