阅读说明：本技术 服务器装置及其卡榫机构 (Server device and tenon clamping mechanism thereof ) 是由 游承翰 萧铭晖 蔡宗兴 于 2019-02-01 设计创作，主要内容包括：服务器装置及其卡榫机构。卡榫机构包含框架、弹片、滑动架、弹性复位件与卡勾部。弹片包含固接部、容纳部与卡扣件。固接部固接框架,相对卡扣件配置。卡扣件位于弹性复位件与卡勾部之间。滑动架包含支架与凸出部。支架可滑动地位于弹片与框架之间。凸出部容纳于容纳部内。弹性复位件连接框架与滑动架。卡勾部连接支架,且可移除地扣接至框架的扣接部。当滑动架推动凸出部、弹性复位件与卡勾部时,凸出部将卡扣件推入框架内、弹性复位件产生形变,卡勾部扣接至扣接部上,以阻止弹性复位件的形变回复。透过以上架构,使用者通过简易操作即可自动完成机箱对机架的卡固,减少简化零组件,降低材料成本与结构复杂度,增加使用者的便利性及使用意愿。(Server device and trip mechanism thereof. The tenon clamping mechanism comprises a frame, an elastic sheet, a sliding frame, an elastic reset piece and a clamping hook part. The elastic sheet comprises a fixed connection part, an accommodating part and a fastener. The fixing part is fixedly connected with the frame and is configured opposite to the fastener. The buckle piece is positioned between the elastic reset piece and the clamping hook part. The sliding frame comprises a bracket and a convex part. The support is slidably positioned between the elastic sheet and the frame. The protruding part is accommodated in the accommodating part. The elastic reset piece is connected with the frame and the sliding frame. The clamping hook part is connected with the bracket and can be removably fastened to the fastening part of the frame. When the carriage promoted bulge, elasticity reset piece and trip portion, the bulge pushed buckle piece in the frame, elasticity reset piece produced deformation, trip portion lock joint to buckling part to the deformation that prevents elasticity reset piece is replied. Through the structure, a user can automatically clamp the chassis to the rack by simple operation, so that the number of simplified components is reduced, the material cost and the structural complexity are reduced, and the convenience and the use desire of the user are improved.)

1. A mortise and tenon mechanism, comprising:

a frame having a receiving space and a buckling part;

the elastic sheet is positioned in the accommodating space, is attached to the inner surface of the frame and comprises a fixedly connected part, an accommodating part, a free end and a clamping piece, wherein the fixedly connected part is fixedly connected with the frame and is opposite to the free end;

a sliding frame, which comprises a bracket and a convex part, wherein the bracket can be slidably positioned between the elastic sheet and the frame, and the convex part is convexly arranged on the bracket and is accommodated in the accommodating part;

an elastic reset piece connecting the frame and the sliding frame; and

a hook part connected with the bracket and removably buckled to the buckling part, and the buckling piece is positioned between the elastic resetting piece and the hook part,

when the sliding frame synchronously pulls the protruding portion, the elastic reset piece and the clamping hook portion, the protruding portion moves into a space between the elastic sheet and the frame, the clamping piece is pushed into the containing space of the frame, the elastic reset piece deforms, and the clamping hook portion is buckled on the buckling portion, so that the elastic reset piece stores restoring force capable of enabling the protruding portion to move back to the containing portion.

2. The mortise and tenon mechanism of claim 1, wherein the frame comprises a first plate and a second plate, the second plate being located on one side of the first plate, wherein the fastening portion is located on the first plate, and the fastening portion is an end face of the second plate.

3. The mortise and tenon mechanism according to claim 1, wherein the hooking portion comprises a hook rotatably coupled to the frame for engaging the engaging portion, and a torsion spring coupled between the frame and the hook for urging the hook toward the engaging portion.

4. The mortise and tenon mechanism of claim 1, wherein the support comprises a first piece and a second piece, the second piece being located on one side of the first piece and orthogonal to the first piece, wherein the protrusion is formed on the first piece; and

the hook part comprises an elastic arm and a hook piece, one end of the elastic arm is integrally connected with the second sheet body, the other end of the elastic arm is a free end, and the hook piece is positioned at the free end of the elastic arm and used for being buckled on the buckling part.

5. The mortise and tenon mechanism of claim 4, wherein the hook member comprises two wedges respectively connected to two opposite sides of the elastic arm and extending in a same direction.

6. The mortise and tenon mechanism of claim 1 further comprising:

a holding part connected with one end of the bracket far away from the fixed connection part, wherein the holding part comprises a ring-shaped handle.

7. The mortise and tenon mechanism of claim 1 further comprising:

a holding part, comprising a body, a pivot shaft and a handle, wherein the handle is connected with the body, the body is pivoted to one end of the bracket far away from the fixed connection part through the pivot shaft, and comprises a leaning part and an inclined part, the leaning part is adjacent to the inclined part, the minimum linear distance from the pivot shaft to the leaning part is larger than the minimum linear distance from the pivot shaft to the inclined part,

when the clamping hook part is buckled on the buckling part and the holding part rotates around the axis of the pivot shaft, so that the abutting part abuts against a fixed object, the sliding frame is limited through the fixed object and the buckling part respectively, and the elastic resetting piece is continuously in a deformation state and stores the restoring force.

8. A server apparatus, comprising:

the rack comprises an inner space, a first slide rail, a second slide rail and a clamping hole, wherein the first slide rail and the second slide rail are oppositely positioned in the inner space, and the clamping hole is positioned on the first slide rail;

a case removably located in the inner space and slidably located on the first slide rail and the second slide rail; and

the mortise and tenon apparatus according to any one of claims 1 to 6, fixed to the case and removably fastened to the fastening hole via the fastening member,

when the fastener is pushed into the accommodating space, the fastener is separated from the fastening hole.

9. The server apparatus according to claim 8, wherein the rack further comprises a trigger portion, the trigger portion being an outer edge of the first slide rail,

when the case moves into the inner space and contacts the trigger part, the trigger part enables the clamping hook part to be separated from the buckling part, so that the elastic resetting piece releases the restoring force.

10. The server apparatus according to claim 8, wherein the housing has a blocking surface; and

the tenon mechanism also comprises a holding part, the holding part comprises a body, a pivot shaft and a holding handle, the holding handle is connected with the body, the body is pivoted to one end of the bracket far away from the fixed connection part through the pivot shaft, the body comprises a leaning part and an inclined part, the leaning part is adjacent to the inclined part and is opposite to the holding handle, the inclined part faces the blocking surface, the minimum straight-line distance from the pivot shaft to the leaning part is larger than the minimum straight-line distance from the pivot shaft to the inclined part,

when the clamping hook part is buckled on the buckling part and the holding part rotates around the axis of the pivot shaft, so that the abutting part abuts against the blocking surface of the case, the sliding frame is limited by the fixed object and the buckling part respectively, and the elastic resetting piece is continuously in a deformation state and stores the restoring force.

Technical Field

The present invention relates to a server device, and more particularly, to a server device with a latch mechanism.

Background

A plurality of slidable server units are arranged in a stacked manner in a cabinet of an existing server device. Each server unit can be horizontally drawn along a sliding rail in the cabinet, so that a host or a hard disk on the server unit can be maintained or replaced.

The conventional server unit is provided with a stop structure so as to position the server unit at a predetermined position in the cabinet and prevent the server unit from unexpectedly shaking in the cabinet and even separating from the slide rail, which causes a safety concern.

However, the stopping structure of these server units still needs to be designed toward more convenient and humanized design in terms of structure, assembly and operation, so as to increase the convenience and willingness of users.

Disclosure of Invention

In one aspect, the present invention provides a server apparatus and a latch mechanism thereof to solve the above-mentioned difficulties in the prior art.

According to an embodiment of the present invention, a mortise and tenon mechanism includes a frame, a resilient plate, a sliding frame, an elastic restoring member, and a hook portion. The frame has an accommodating space and a buckling part. The elastic sheet is positioned in the containing space and is attached to the inner surface of the frame. The elastic sheet comprises a fixed connection part, an accommodating part, a free end and a fastener. The buckle piece is positioned between the elastic reset piece and the clamping hook part. The fixed connection part is fixedly connected with the frame and is opposite to the free end. The accommodating part is positioned between the fixed connection part and the free end, and the buckling piece is positioned on the free end and extends out of the frame from the accommodating space. The sliding frame comprises a support and a protrusion. The support is slidably positioned between the elastic sheet and the frame. The convex part is convexly arranged on the bracket and is accommodated in the accommodating part. The elastic reset piece is connected with the frame and the sliding frame. The clamping hook part is connected with the bracket and can be removably buckled to the buckling part. So, when the carriage pulled the bulge in step, elasticity resets and the trip portion, the bulge immigrated between shell fragment and the frame to push buckle spare in the accommodation space of frame, elasticity resets the piece and produces deformation, and trip portion lock joint to the buckling part, so that elasticity resets the piece and stores a restoring force that can let the bulge move back the accommodation portion.

In one or more embodiments of the present invention, the frame includes a first plate and a second plate. The second plate is located on one side of the first plate. The fixed connection part is positioned on the first plate, and the buckling part is an end face of the second plate.

In one or more embodiments of the present invention, the hook portion includes a hook and a torsion spring. The hook body is rotatably connected to the bracket and used for buckling the buckling part. The torsion spring is connected with the bracket and the hook body and used for pushing the hook body to the buckling part.

In one or more embodiments of the present invention, the stent includes a first plate and a second plate. The second sheet body is positioned on one side of the first sheet body and is orthogonal to the first sheet body. The bulge is formed on the first sheet body. The clamping hook part comprises an elastic arm and a hook piece, one end of the elastic arm is integrally connected with the second sheet body, the other end of the elastic arm is a free end, and the hook piece is located at the free end of the elastic arm and used for being buckled on the buckling part.

In one or more embodiments of the present invention, the hook member includes two wedge-shaped pieces. The wedge-shaped pieces are respectively connected with two opposite sides of the elastic arm and extend towards the same direction.

In one or more embodiments of the present invention, the tenon mechanism further includes a holding portion. The holding part is connected with one end of the bracket far away from the fixed connection part and comprises an annular handle.

In one or more embodiments of the present invention, the tenon mechanism further includes a holding portion. The holding portion comprises a body, a pivot shaft and a handle. The handle is connected with the body, and the body is pivoted to one end of the bracket far away from the fixed connection part through the pivot shaft. The body comprises an abutting part and an inclined part. The abutting part is adjacent to the inclined part and is opposite to the grab handle. The inclined portion faces the blocking surface, and the minimum linear distance from the pivot shaft to the abutting portion is greater than the minimum linear distance from the pivot shaft to the inclined portion. Therefore, when the clamping hook part is buckled on the buckling part and the holding part rotates around the axis of the pivot shaft, so that the abutting part abuts against a fixed object, the sliding frame is limited by the fixed object and the buckling part respectively, and the elastic resetting part is continuously in a deformation state and stores restoring force.

According to another embodiment of the present invention, a server apparatus includes a rack, a case and the latch mechanism. The frame comprises an inner space, a first slide rail, a second slide rail and a clamping hole. The first slide rail and the second slide rail are oppositely positioned in the inner space. The clamping hole is positioned on the first slide rail. The case is removably located in the inner space and can be slidably located on the first slide rail and the second slide rail. The clamping tenon mechanism is fixedly arranged on the case and can be removably clamped on the clamping hole through the clamping piece. When the fastener is pushed into the accommodating space, the fastener is separated from the fastening hole.

In one or more embodiments of the present invention, the frame further includes a triggering portion. The triggering part is an outer end edge of the first slide rail. Therefore, when the case moves into the inner space and contacts the trigger part, the trigger part enables the clamping hook part to be separated from the buckling part, so that the elastic resetting piece releases the restoring force.

In one or more embodiments of the present invention, the housing has a blocking surface. The tenon clamping mechanism also comprises a holding part. The holding portion comprises a body, a pivot shaft and a handle. The handle is connected with the body, and the body is pivoted to one end of the bracket far away from the fixed connection part through the pivot shaft. The body comprises an abutting part and an inclined part. The abutting part is adjacent to the inclined part and is opposite to the grab handle. The inclined portion faces the blocking surface, and the minimum linear distance from the pivot shaft to the abutting portion is greater than the minimum linear distance from the pivot shaft to the inclined portion. Therefore, when the clamping hook part is buckled on the buckling part and the holding part rotates around the axis of the pivot shaft so that the abutting part abuts against the blocking surface of the case, the sliding frame is limited by the fixture and the buckling part respectively, and the elastic resetting part is continuously in a deformation state and stores restoring force.

Therefore, through the above framework, a user can automatically clamp the chassis to the rack through simple operation, so that not only are simplified components reduced, but also material cost and structural complexity are reduced, and convenience and use will of the user are increased.

The foregoing is merely illustrative of the problems, solutions to problems, and other advantages that may be realized and attained by the invention, and the details of which are set forth in the following description and the drawings.

Drawings

In order to make the aforementioned and other objects, features, and advantages of the invention, as well as others which will become apparent, reference is made to the following description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded view of a server device according to an embodiment of the invention;

FIG. 2 is a perspective view of the latch mechanism according to the first embodiment of the present invention;

FIG. 3 is an exploded view of the latch mechanism of FIG. 2;

FIG. 4A is an operation diagram of the latch mechanism of FIG. 3 in an unlocked state;

FIG. 4B depicts a top view of the trip mechanism of FIG. 4A;

FIG. 5A shows a front view of a mortise and tenon mechanism according to a second embodiment of the present invention;

FIG. 5B is a partial cross-sectional view taken along line A-A of FIG. 5A;

FIG. 6A is a perspective view of a latch mechanism according to a third embodiment of the present invention;

FIG. 6B depicts an exploded view of the trip mechanism of FIG. 6A;

FIGS. 7A and 7B illustrate sequential operation of the mortise and tenon mechanism of FIG. 6A in an unlocked state;

FIG. 8 is a perspective view of a latch mechanism according to a fourth embodiment of the present invention;

FIG. 9A is an operational view of the latch mechanism of FIG. 8 in an unlocked state;

FIG. 9B is an operational diagram illustrating the latch mechanism of FIG. 8 in a permanently unlocked state; and

FIG. 9C is the view of the latch mechanism of FIG. 9B without the latch being engaged by the latch.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, these practical details are not necessary in these embodiments of the invention. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.

Fig. 1 is an exploded view of a server device 10 according to an embodiment of the invention. As shown in fig. 1, in the present embodiment, the server apparatus 10 includes a rack 100, a case 200, and a latch mechanism 300. The rack 100 includes an inner space 110, a first slide rail 120 and a second slide rail 130. The first slide rail 120 and the second slide rail 130 are respectively fixed on the rack 100 and located in the inner space 110 opposite to each other. The first slide rail 120 has at least one (e.g., 2) fastening holes 140. The chassis 200 may be slidably disposed on the first slide rail 120 and the second slide rail 130, such that the chassis 200 is removably received in the inner space 110. The tenon engaging mechanism 300 is fixed on the case 200 so as to move synchronously with the case 200. The tenon mechanism 300 is disposed on the side plate 201 of the chassis 200 corresponding to the first slide rail 120. For example, the tenon mechanism 300 is disposed inside the side plate 201 to be buckled to the fastening hole 140 through the through hole 202 of the side plate 201, so that the chassis 200 is fixed on the rack 100.

More specifically, fig. 2 is a perspective view of the latch mechanism 300 according to the first embodiment of the present invention. Fig. 3 is an exploded view of the latch mechanism of fig. 2. As shown in fig. 2 and fig. 3, in the present embodiment, the latch mechanism 300 includes a frame 400, a resilient piece 500, a holding portion 520, a sliding frame 600, an elastic restoring piece 700, and a hook portion 800. The frame 400 has a receiving space 420 and at least one (e.g., 2) openings 430. The opening 430 is formed in the inner face 410 of the frame 400. The elastic sheet 500 is located in the accommodating space 420 and attached to the inner surface 410 of the frame 400. The resilient piece 500 includes an elongated body 510, an accommodating portion 513 and at least one (e.g. 2) fasteners 514. The elongated body 510 has a first end 511 and a second end 512 opposite to each other. The first end 511 is fixed to the inner surface 410 of the frame 400 through the fixing portion 515, and the second end 512 is a free end. The receiving portion 513 is located between the first end 511 and the second end 512, such as a through hole, however, the invention is not limited thereto, and in other embodiments, the receiving portion 513 may also be a recessed portion of the elongated body 510. The latch 514 is located on the second end 512 of the elongated body 510 and extends out of the frame 400 from the opening 430. The elongated body 510 has a bending portion 516, the bending portion 516 is adjacent to the fastening portion 515, so that the resilient tab 500 drives the locking member 514 to extend out of the frame 400 from the opening 430 of the frame 400.

The carriage 600 includes a support 610 and a projection 613. The bracket 610 is slidably located between the dome 500 and the frame 400. The protrusion 613 is protruded from the bracket 610 and is received in the receiving portion 513. The bracket 610 has a third end 611 and a fourth end 612 opposite to each other. The holding portion 520 is connected to the third end 611 of the bracket 610 and extends out of the inner space 110 (fig. 1). The grip 520 includes an L-shaped handle 530. The third end 611 of the stent 610 is proximate to the securement portion 515 of the elongate blade 510. The elastic restoring member 700 is, for example, a compression spring, and connects the frame 400 and the carriage 600. The hook 800 is connected to the bracket 610 for removably fastening to the fastening portion of the frame 400. In this embodiment, the latch 514 is located between the elastic restoring member 700 and the fastening portion 515.

More specifically, the frame 400 includes a first plate 440, a second plate 450, and a third plate 460. The second plate 450 and the third plate 460 are respectively located on two opposite sides of the first plate 440 and extend in the same direction (e.g., Y-axis direction). For example, the same direction (e.g., Y-axis direction) is orthogonal to the long axis direction (e.g., X-axis direction) of the first plate member 440. The second plate 450 has a crevasse 451, and the fastening portion is a crevasse inner side 452 of the crevasse 451.

In addition, the hooking portion 800 includes a hook 810 and a torsion spring 820. The hook 810 is rotatably connected to the bracket 610 through a pivot 821. The torsion spring 820 is fixed on the bracket 610 through the protruding pillar 822 and connects the bracket 610 and the hook 810 to provide an elastic force to continuously push the hook 810 toward the second plate 450.

Fig. 4A is an operation diagram of the latch mechanism 300 of fig. 3 in an unlocked state. Fig. 4B illustrates a top view of the mortise and tenon mechanism 300 of fig. 4A. As shown in fig. 1, 4A and 4B, when the user pushes the holding portion 520 toward the inner space 110 (e.g., the moving direction D1) to move the sliding frame 600 relative to the frame 400, because the protrusion 613 moves into the space between the resilient piece 500 and the frame 400 along with the sliding frame 600 from the accommodating portion 513, the second end 512 of the elongated plate 510 is pulled to enlarge the gap G (fig. 4B) between the resilient piece 500 and the frame 400, so that the locking member 514 is pushed back into the accommodating space 420 from the opening 430, i.e., the locking member 514 is disengaged from the locking hole 140 (fig. 1) of the first slide rail 120. As such, the chassis 200 is no longer fixedly retained within the interior space 110, and therefore, the chassis 200 can be pulled out of the interior space 110 of the rack 100 (fig. 1).

In addition, at the same time as the carriage 600 moves relative to the frame 400, the elastic restoring member 700 begins to be compressed by the carriage 600 and the frame 400, is in a deformed state, and stores a restoring force that allows the protrusion 613 to move back to the receptacle 513. As the carriage 600 moves, the hook 810 of the hook 800 is pushed into the break 451 along the second plate 450 to be fastened to the inner side 452 of the break, and the mortise and tenon mechanism 300 is temporarily in a force balance state, which is called an unlocked state.

It should be understood that, since the locking element 514 is temporarily forced in the accommodating space 420 of the frame 400 and does not protrude out of the frame 400 from the opening 430, the locking element 514 does not interfere with the first sliding rail 120 during the process of pulling out the chassis 200, thereby reducing the chance of damage to the locking element 514 or the first sliding rail 120.

In addition, the resilient sheet 500 further has a guiding portion 517. The guiding portion 517 is located at an edge of the elongated body 510 facing the accommodating portion 513, so that the protrusion 613 can move into between the resilient piece 500 and the frame 400 more smoothly.

Conversely, when the user pushes the chassis 200 into the internal space 110 of the rack 100, once the hook 800 extending out of the break 451 contacts the trigger 150 in the rack 100 through the slot 204 (fig. 1) of the bottom plate 202 of the chassis 200, the trigger 150 in the rack 100 pushes the hook 800, so that the hook 800 retracts from the break 451 into the receiving space 420 and separates from the break 451. Therefore, the sliding frame 600, the locking member 514 and the hook 800 can be automatically returned to the original position (as shown in fig. 2) by the restoring force of the elastic restoring member 700 without being interfered by the sliding frame 600, and the user does not need to manually operate the locking member, thereby improving the convenience and the willingness of the user. For example, the triggering portion 150 is, for example, a front edge or other side edges of the first slide rail 120, however, the invention is not limited thereto.

Further, as shown in fig. 1, the rack 100 includes four outer columns 101. The outer columns 101 are vertically spaced apart from each other to collectively enclose the inner space 110. The first slide rail 120 is fixedly connected with the two outer column members 101. The second slide rail 130 is fixedly connected with the other two column members 101.

Fig. 5A is a front view of the latch mechanism 301 according to the second embodiment of the present invention. Fig. 5B is a partial cross-sectional view taken along line a-a of fig. 5A. As shown in fig. 5A and 5B, the latch mechanism 301 of fig. 5A is substantially the same as the latch mechanism 300 of fig. 2, and the difference is that: the hook 801 is a part of the bracket 610 and is not a separate element pivotally connected to the bracket 610. For example, but not as a limitation of the invention, the stent 610 comprises a first sheet 621 and a second sheet 622. The second sheet 622 is located on one side of the first sheet 621, and is orthogonal to the first sheet 621, or at least intersecting with the first sheet 621, wherein the protrusion 613 is formed on the first sheet 621, the first sheet 621 depends on the first plate 440, the second sheet 622 is stacked on the second plate 450, and the hook 801 is integrally connected to the second sheet 622. More specifically, the hook 801 includes a resilient arm 830 and a hook 840. The spring arm 830 has one end integrally connected to the second blade 622 and the other end being a free end 842 extending toward the fastening portion 515. The hook 840 is located at the free end 842 of the spring arm 830. Thus, when the sliding frame 600 is pushed in the moving direction D1, the hook 840 of the second plate 622 falls into the cut 451 and is fastened to the inner side 452 of the cut, and the hook 840 of the hook 801 enables the elastic restoring member 700 to store the restoring force.

As shown in fig. 5B, more specifically, the hook 840 further includes two wedge-shaped pieces 841. The wedge-shaped pieces 841 are respectively connected to two opposite sides of the elastic arm 830 and extend in the same direction, so that the hooking portion 801 is more conveniently completed.

Fig. 6A is a perspective view of a latch mechanism 302 according to a third embodiment of the invention. Fig. 6B illustrates an exploded view of the latch mechanism of fig. 6A. Fig. 7A and 7B are sequential operation diagrams illustrating the mortise and tenon mechanism 302 of fig. 6A in an unlocked state. As shown in fig. 6A, the latch mechanism 302 of fig. 6A is substantially the same as the latch mechanism 300 of fig. 2, with the difference that: the fastening portion is an end surface 453 of the second plate 450 facing the holding portion 521, and is not a broken inner side 452, and the elastic restoring member 701 is an extension spring, and the holding portion 521 includes a ring-shaped handle 540. In this embodiment, the latch 514 is located between the elastic restoring member 701 and the ring-shaped handle 540. The third end 611 of the bracket 610 extends in the Y-axis direction, and is inserted into and fixed to the ring handle 540 through the assembly groove 541 of the ring handle 540 for the user to grasp.

Thus, when the user pulls the holding portion 521 and the sliding frame 600 back to the inner space 110 (e.g., the moving direction D2), as shown in fig. 7A, the protrusion 613 moves from the receiving portion 513 into between the elongated blade 510 and the frame 400 along the moving direction D2, so that the locking element 514 retracts from the opening 430 into the receiving space 420, and the hook 811 of the locking hook 802 leaves the surface of the second plate 450 and is pushed downward by the torsion spring 820.

Then, when the user does not apply force to pull the grip 521 and the carriage 600, the restoring force of the elastic restoring element 701 drives the grip 521 and the carriage 600 in opposite directions (e.g., the moving direction D1), so that the hook 811 of the hook 802 is moved to the end surface 453 of the second plate 450 (fig. 7A), and the hook 811 of the hook 802 can be fastened to the end surface 453 of the second plate 450 (fig. 7B), so that the mortise-tenon mechanism 302 is temporarily in an unlocked state.

It is understood that the latch 514 is hook-shaped with a beveled edge 518 and the opening 430 has an inner edge 431. Therefore, when the carriage 600 is pulled in the moving direction D2, the inner edge of the opening 430 pushes the inclined edge 518 of the latch 514, so that the protrusion 613 moves into and enlarges the gap between the long and narrow piece 510 and the frame 400 more smoothly.

In addition, in this embodiment, the hook portion 802 of fig. 6A can be replaced with the hook portion 801 of fig. 5A, as long as the free end of the elastic arm of the second plate of the bracket extends toward the ring-shaped handle, so that the hook can be fastened to the end surface 453 to store the restoring force of the elastic restoring member 701.

Fig. 8 is a perspective view of a latch mechanism 303 according to a fourth embodiment of the present invention. As shown in fig. 8, the latch mechanism 303 of fig. 8 is substantially the same as the latch mechanism 302 of fig. 6A, with the difference that: the holding portion 523 of the tenon mechanism 303 is pivotally disposed on the bracket 610 and is not fixedly connected to the bracket 610.

Specifically, the housing 200 has a blocking surface 210 facing the holding portion 523. The holding portion 523 includes a body 550, a pivot 553 and a handle 555. A grip 555 is attached to one side of body 550. The body 550 is pivotally connected to an end of the bracket 610 remote from the stationary portion 515 by a pivot 553, such that the body 550 is capable of rotating relative to the carriage 600 about the axis of the pivot 553. More specifically, the body 550 includes an abutting portion 551 and an inclined portion 552. The abutting portion 551 abuts the inclined portion 552 and is disposed opposite to the grip 555. The minimum linear distance 551L of the pivot axis 553 to the abutting portion 551 is greater than the minimum linear distance 552L of the pivot axis 553 to the inclined portion 552. In other words, the pivot axis 553 is not on the centroid of the body 550.

Fig. 9A is an operation diagram illustrating the latch mechanism 303 of fig. 8 in a latched state. Fig. 9B illustrates the latch mechanism 303 of fig. 8 in a permanently unlocked state. Fig. 9C is a diagram illustrating the operation of the latch mechanism 303 of fig. 9B no longer being engaged by the fastening portion. As shown in fig. 9A, when the user pulls the holding portion 523 and the sliding rack 600 toward the left (e.g., the moving direction D2), the hook portion 802 is fastened to the fastening portion (i.e., the end surface 453 of the frame 400), and the latch mechanism 303 is in an unlocked state (fig. 9A). Then, the user rotates the grip portion 523 again, so that the abutting portion 551 of the grip portion 523 abuts directly against the blocking surface 210 of the frame 100 (fig. 9B). Therefore, the sliding frame 600 is continuously deformed and prevented from releasing the restoring force by the blocking surface 210 and the buckling portion (i.e., the end surface 453 of the frame 400) to limit the movement of the sliding frame 600, so that the sliding frame 600 cannot be pulled back by the elastic restoring member 700.

Thus, even if the hook 811 is pushed back into the accommodating space 420 by the trigger 150 and the stop of the end surface 453 against the sliding frame 600 is released (fig. 9C), the sliding frame 600 cannot be pulled back to the original position by the elastic restoring member 700 through the stop of the blocking surface 210 against the holding portion 523, so that the latch mechanism 303 of the present embodiment is in a permanently unlocked state and the stop of the latch (i.e., the end surface 453 of the frame 400) against the sliding frame 600 is not released (fig. 9B).

Since the abutting portion 551 of the grip portion 523 is farther from the pivot axis 553 than the inclined portion 552, the blocking surface 210 of the chassis 100 can directly abut against the abutting portion 551 of the grip portion 523 when the grip portion 523 rotates in the rotation direction C1 relative to the carriage 600; conversely, when the handle 523 rotates in the rotation direction C2 relative to the carriage 600, the abutting portion 551 of the frame 100 does not abut directly against the blocking surface 210 of the frame 100, but keeps a distance from the blocking surface 210 of the frame 100.

In this way, when the handle 523 is rotated such that the abutting portion 551 of the frame 100 faces the blocking surface 210 of the frame 100, since the abutting portion 551 of the frame 100 cannot directly block the blocking surface 210, once the carriage 600 is no longer blocked by the buckling portion (i.e., the end surface 453 of the frame 400), the carriage 600 can be pulled back to the original position by the restoring force of the elastic restoring member 700.

Finally, the above-described embodiments are not intended to limit the invention, and those skilled in the art should be able to make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the present invention is defined by the appended claims.