CN220009241U - Cover opening and closing mechanism capable of reducing cover opening key stroke - Google Patents

Abstract

The utility model discloses a cover opening and closing mechanism capable of reducing the travel of a cover opening key, which comprises an upper fixing piece, a lower fixing piece, a movable clamping hook, a cover opening key and a cover opening transmission piece, wherein the upper fixing piece is connected with the lower fixing piece; the upper part of the movable clamping hook is rotationally connected with the upper fixing piece, the lower part of the movable clamping hook is buckled with the lower fixing piece through the hook part, and the upper part of the movable clamping hook is provided with a first contact point; the cover opening key is slidably arranged on the upper fixing piece, and a second contact point is arranged on the inner side of the cover opening key; the cover opening transmission piece is rotationally connected with the upper fixing piece and is provided with a first swing arm and a second swing arm; when the cover is opened, the cover opening key is pressed inwards, the second contact point acts on the second swing arm, so that the cover opening transmission piece rotates relative to the upper fixing piece, the first swing arm acts on the first contact point, the upper part of the movable clamping hook rotates relative to the upper fixing piece, and the hook part is separated from the lower fixing piece. The buckling amount of the movable hook is guaranteed to meet product requirements, the stroke of the uncovering key can be reduced, and the height of the uncovering key protruding out of the outer surface of the whole machine is reduced.

Description

Cover opening and closing mechanism capable of reducing cover opening key stroke

Technical Field

The utility model relates to the technical field of printers, in particular to a cover opening and closing mechanism capable of reducing cover opening key stroke.

Background

At present, small-sized thermal printers in the market are all provided with a cover opening button at the end part of a movable clamping hook of a lower cover, and when the cover is opened, the movable clamping hook can be separated from a base by pressing the cover opening button, so that the upper cover of the printer can be opened. When the upper cover and the lower cover of the printer are subjected to separation tension, the movable clamping hooks are easy to unhook, so that the upper cover is automatically opened. Therefore, it is common to increase the stroke of the movable hook to prevent unhooking. In the related art, the height of the cover opening button is generally increased to increase the pressing stroke, so as to achieve the purpose of increasing the stroke of the movable hook. The increase of the height of the uncovering key causes the uncovering key to protrude out of the outer surface of the whole machine more, which affects the aesthetic property of the product, and when the printer is carried, the probability of mistakenly touching the uncovering key is increased due to the excessively high height of the uncovering key, so that the upper cover of the printer is automatically opened, and the printer is inconvenient for users to use.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide the cover opening and closing mechanism capable of reducing the travel of the cover opening key, which can ensure that the buckling amount of the movable clamping hook can meet the product requirement and also can reduce the travel of the cover opening key, thereby reducing the height of the cover opening key protruding out of the outer surface of the whole machine and ensuring the aesthetic property of the product.

In order to solve the problems, the technical scheme adopted by the utility model is as follows: a cover opening and closing mechanism capable of reducing the travel of a cover opening key comprises an upper fixing piece, a lower fixing piece, a movable clamping hook, a cover opening key and a cover opening transmission piece; the upper part of the movable clamping hook is rotationally connected with the upper fixing piece, the lower part of the movable clamping hook is buckled with the lower fixing piece through a hook part, and a first contact point is arranged on the upper part of the movable clamping hook; the cover opening key is slidably arranged on the upper fixing piece, and a second contact point is arranged on the inner side of the cover opening key; the cover opening transmission piece is rotationally connected with the upper fixing piece and is provided with a first swing arm and a second swing arm; when the cover is opened, the cover opening key is pressed inwards, the second contact point acts on the second swing arm, so that the cover opening transmission piece rotates relative to the upper fixing piece, the first swing arm acts on the first contact point, the upper part of the movable clamping hook rotates relative to the upper fixing piece, and the hook part is separated from the lower fixing piece.

Compared with the prior art, the utility model has the beneficial effects that: the cover opening and closing mechanism is provided with a cover opening transmission piece, the cover opening transmission piece is provided with a first swing arm and a second swing arm, the first swing arm and the second swing arm are respectively matched with a first contact point and a second contact point to work, and the linear sliding of the cover opening key can be converted into the rotary motion of the movable clamping hook. Under the transmission action of the first swing arm and the second swing arm, a smaller sliding stroke is provided for the cover opening key, and a larger buckling stroke can be obtained through conversion at the hook part of the movable hook. The buckling amount of the movable hook is guaranteed to meet product requirements, and the stroke of the uncovering key can be reduced, so that the height of the uncovering key protruding out of the outer surface of the whole machine is reduced, and the attractiveness of the product is guaranteed.

The cover opening and closing mechanism capable of reducing the travel of the cover opening key is characterized in that a first reset spring is connected between the movable clamping hook and the upper fixing piece, and a second reset spring is connected between the cover opening key and the upper fixing piece.

The cover opening and closing mechanism capable of reducing the travel of the cover opening key, wherein the rotating plane of the movable clamping hook is a vertical plane, the rotating plane of the cover opening transmission piece is a horizontal plane, and the sliding direction of the cover opening key is along the horizontal direction.

The cover opening and closing mechanism capable of reducing the cover opening and closing key stroke comprises a hook part, wherein the hook part is provided with a first buckling inclined plane, the lower fixing piece is provided with a second buckling inclined plane, the second buckling inclined plane is inclined upwards along the direction away from the hook part, and when the cover is closed, the first buckling inclined plane is buckled and connected with the second buckling inclined plane.

The cover opening and closing mechanism capable of reducing the cover opening key stroke is characterized in that the first buckling inclined surface is an arc-shaped surface.

The cover opening and closing mechanism capable of reducing the cover opening and closing button travel is characterized in that two groups of movable hooks are arranged, the two groups of movable hooks are connected through the hook connecting plate, and the cover opening button and the cover opening transmission piece are correspondingly provided with two groups.

The cover opening and closing mechanism capable of reducing the cover opening and closing key stroke is characterized in that the two ends of the clamping hook connecting plate are respectively provided with an inserting part, and the two groups of movable clamping hooks are respectively detachably inserted into the two groups of inserting parts.

The cover opening and closing mechanism capable of reducing the cover opening key stroke is characterized in that the inserting part is flat.

The cover opening and closing mechanism capable of reducing the cover opening and closing key stroke is characterized in that the first swing arm and the second swing arm are distributed in a V shape.

The cover opening and closing mechanism capable of reducing the cover opening and closing key stroke is characterized in that the upper fixing piece is provided with a convex column, and the cover opening transmission piece is rotationally sleeved on the convex column.

The utility model is described in further detail below with reference to the drawings and the detailed description.

Drawings

FIG. 1 is an exploded view of a cover opening and closing mechanism according to an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of a cover opening and closing mechanism;

FIG. 3 is a longitudinal cross-sectional view of the cover opening and closing mechanism according to the embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic partial structure of the hook portion of the embodiment of the present utility model when the hook portion is engaged with the lower fixing member.

Reference numerals illustrate: 100 upper fixing parts, 110 convex columns, 120 clamping hook rotating shafts, 200 lower fixing parts, 210 second buckling inclined planes, 300 movable clamping hooks, 310 hook parts, 311 first buckling inclined planes, 320 first contact points, 330 clamping hook connecting plates, 331 plug-in parts, 400 uncovering keys, 410 second contact points, 500 uncovering transmission parts, 510 first swing arms, 520 second swing arms, 600 first reset springs and 700 second reset springs.

Detailed Description

Referring to fig. 1 to 5, an embodiment of the present utility model provides a cover opening and closing mechanism capable of reducing a cover opening and closing key stroke, including an upper fixing member 100, a lower fixing member 200, a movable hook 300, a cover opening key 400, and a cover opening transmission member 500; the upper part of the movable hook 300 is rotationally connected with the upper fixing piece 100, the lower part is buckled and connected with the lower fixing piece 200 through the hook part 310, and the upper part of the movable hook 300 is provided with a first contact point 320; the cover opening button 400 is slidably mounted on the upper fixing member 100, and a second contact point 410 is arranged on the inner side of the cover opening button 400; the cover opening transmission member 500 is rotatably connected to the upper fixing member 100, and the cover opening transmission member 500 has a first swing arm 510 and a second swing arm 520; when the cover is opened, the cover opening button 400 is pressed inwards, the second contact point 410 acts on the second swing arm 520, so that the cover opening transmission member 500 rotates relative to the upper fixing member 100, the first swing arm 510 acts on the first contact point 320, the upper part of the movable hook 300 rotates relative to the upper fixing member 100, and the hook part 310 is separated from the lower fixing member 200.

Compared with the prior art, the cover opening and closing mechanism is provided with the cover opening transmission piece 500, the cover opening transmission piece 500 is provided with the first swing arm 510 and the second swing arm 520, and the first swing arm 510 and the second swing arm 520 are respectively matched with the first contact point 320 and the second contact point 410 to work, so that the linear sliding of the cover opening key 400 can be converted into the rotary motion of the movable clamping hook 300. As shown in fig. 4, under the transmission action of the first swing arm 510 and the second swing arm 520, the horizontal displacement S1 of the first contact point 320 is smaller than the horizontal displacement S2 of the hook portion 310 of the movable hook 300, so that a smaller sliding stroke is provided for the door button 400, and a larger fastening stroke can be obtained by switching between the hook portion 310 of the movable hook 300. The buckling amount of the movable hook 300 can meet the product requirement, and the stroke of the uncovering key 400 can be reduced, so that the height of the uncovering key 400 protruding out of the outer surface of the whole machine is reduced, and the attractiveness of the product is ensured.

Further, as shown in fig. 2, a first return spring 600 is connected between the movable hook 300 and the upper fixing member 100, one end of the first return spring 600 abuts against the movable hook 300, and the other end abuts against the upper fixing member 100. A second return spring 700 is connected between the cover opening button 400 and the upper fixing member 100, one end of the second return spring 700 abuts against the cover opening button 400, and the other end abuts against the upper fixing member 100. After the person releases the cover opening button 400, the first return spring 600 returns the movable hook 300 to the initial position relative to the upper fixing member 100, and the second return spring 700 returns the cover opening button 400 to the initial position relative to the upper fixing member 100. After the cover is closed, the elastic forces of the first return spring 600 and the second return spring 700 can also enable the movable hook 300 which is not subjected to external force to keep the buckling action with the lower fixing piece 200. Specifically, as shown in fig. 2 to 4, the rotation plane of the movable hook 300 is a vertical plane, the rotation plane of the cover opening transmission member 500 is a horizontal plane, and the sliding direction of the cover opening key 400 is along the horizontal direction. When the cover opening button 400 slides linearly along the horizontal direction, the movable hook 300 can be rotated on the vertical plane by the transmission of the cover opening transmission member 500.

Further, referring to fig. 1 and 2, two sets of movable hooks 300 are provided, the two sets of movable hooks 300 are connected by a hook connecting plate 330, and the cover opening button 400 and the cover opening driving member 500 are respectively provided with two sets. The cover opening and closing mechanism can be applied to a small thermal printer, and when a single hand can simultaneously press two groups of cover opening keys 400 and push the cover opening keys 400 backwards, two groups of movable hooks 300 can be separated from the lower fixing piece 200 simultaneously under the action of two groups of cover opening transmission pieces 500. Specifically, the two ends of the hook connecting plate 330 are respectively provided with a plugging portion 331, the plugging portion 331 is flat, and the two groups of movable hooks 300 are detachably plugged into the two groups of plugging portions 331 respectively. At present, the synchronicity of the hooks at two sides of a product on the market is realized by limiting connection of a rotating shaft, and when the stress is uneven, the hooks at two sides are subjected to larger unsynchronized torque, so that the hooks at two sides are twisted and deformed to influence the performance of synchronously opening and closing the cover. In this embodiment, the two sets of movable hooks 300 are connected through the hook connecting plate 330, the movable hooks 300 are connected to the upper fixing member 100 through the hook rotating shaft 120, and the hook connecting plate 330 is deviated from the hook rotating shaft 120 by a distance, so that the unsynchronized torque of the two sets of movable hooks 300 can be greatly reduced, and the distortion caused by uneven stress is improved. In addition, the plugging portion 331 is flat, and forms a prolate fit with the connection portion of the movable hook 300, so that the movable hook 300 cannot rotate relative to the hook connecting plate 330, and further anti-twisting performance is increased.

Further, referring to fig. 3 and 4, the hook portion 310 has a first fastening inclined surface 311, the lower fixing member 200 has a second fastening inclined surface 210, and the second fastening inclined surface 210 is inclined upwards in a direction away from the hook portion 310, and when the cover is closed, the first fastening inclined surface 311 is fastened with the second fastening inclined surface 210. At present, the buckling surface of the clamping hook of a product on the market is a plane, and when the clamping hook is pulled, the counterforce of the buckling surface can generate unhooking moment, so that the buckling performance of the clamping hook is unstable, and unhooking is easy to generate. In the present embodiment, the first buckling inclined surface 311 is buckled with the second buckling inclined surface 210, and when the movable hook 300 is stressed, the direction of the reaction force forms a certain angle with the movable hook 300, so that the unhooking moment is greatly reduced, and the stability of the product is increased. Furthermore, the first fastening inclined surface 311 is an arc surface, which can reduce the unhooking moment to a certain extent and avoid the difficulty in opening the cover due to too large resistance.

Specifically, as shown in fig. 1 and 2, the first swing arm 510 and the second swing arm 520 are distributed in a V shape. After the second contact point 410 acts on the second swing arm 520, the cover opening transmission member 500 rotates by a small angle, so that the first swing arm 510 acts on the first contact point 320, thereby further reducing the stroke of the cover opening key 400. Specifically, the upper fixing member 100 is provided with a protruding column 110, and the cover opening transmission member 500 is rotatably sleeved on the protruding column 110.

It should be noted that, in the description of the present utility model, if an azimuth or positional relationship is referred to, for example, upper, lower, front, rear, left, right, etc., the azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be configured or operated in a specific azimuth, and should not be construed as limiting the present utility model.

In the description of the present utility model, a plurality means one or more, and a plurality means two or more, and it is understood that greater than, less than, exceeding, etc. does not include the present number, and it is understood that greater than, less than, within, etc. include the present number. If any, first or second, etc. are described for the purpose of distinguishing between technical features only and not for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (10)

1. The cover opening and closing mechanism capable of reducing the travel of the cover opening key is characterized by comprising an upper fixing piece (100), a lower fixing piece (200), a movable clamping hook (300), a cover opening key (400) and a cover opening transmission piece (500);

the upper part of the movable clamping hook (300) is rotationally connected with the upper fixing piece (100), the lower part of the movable clamping hook is buckled and connected with the lower fixing piece (200) through a hook part (310), and a first contact point (320) is arranged at the upper part of the movable clamping hook (300);

the cover opening key (400) is slidably mounted on the upper fixing piece (100), and a second contact point (410) is arranged on the inner side of the cover opening key (400);

the cover opening transmission piece (500) is rotationally connected with the upper fixing piece (100), and the cover opening transmission piece (500) is provided with a first swing arm (510) and a second swing arm (520);

when the cover is opened, the cover opening button (400) is pressed inwards, the second contact point (410) acts on the second swing arm (520), so that the cover opening transmission piece (500) rotates relative to the upper fixing piece (100), the first swing arm (510) acts on the first contact point (320), the upper part of the movable clamping hook (300) rotates relative to the upper fixing piece (100), and the hook part (310) is separated from the lower fixing piece (200).

2. The cover opening and closing mechanism capable of reducing the cover opening and closing key stroke according to claim 1, wherein a first reset spring (600) is connected between the movable hook (300) and the upper fixing piece (100), and a second reset spring (700) is connected between the cover opening key (400) and the upper fixing piece (100).

3. The cover opening and closing mechanism capable of reducing a cover opening button stroke according to claim 1, wherein a rotation plane of the movable hook (300) is a vertical plane, a rotation plane of the cover opening transmission member (500) is a horizontal plane, and a sliding direction of the cover opening button (400) is along a horizontal direction.

4. The cover opening and closing mechanism capable of reducing the cover opening and closing button travel according to claim 1, wherein the hook portion (310) is provided with a first buckling inclined surface (311), the lower fixing member (200) is provided with a second buckling inclined surface (210), the second buckling inclined surface (210) is inclined upwards along a direction away from the hook portion (310), and when the cover is closed, the first buckling inclined surface (311) is buckled with the second buckling inclined surface (210).

5. The cover opening and closing mechanism capable of reducing cover opening key travel according to claim 4, wherein the first buckling inclined surface (311) is an arc-shaped surface.

6. The cover opening and closing mechanism capable of reducing the cover opening and closing button travel according to claim 1, wherein two groups of movable hooks (300) are arranged, the two groups of movable hooks (300) are connected through a hook connecting plate (330), and the cover opening button (400) and the cover opening transmission piece (500) are respectively provided with two groups correspondingly.

7. The cover opening and closing mechanism capable of reducing cover opening and closing key travel according to claim 6, wherein two ends of the hook connecting plate (330) are respectively provided with an inserting portion (331), and two groups of movable hooks (300) are respectively detachably inserted into two groups of inserting portions (331).

8. The cover opening and closing mechanism capable of reducing the cover opening button stroke according to claim 7, wherein the insertion portion (331) is flat.

9. The cover opening and closing mechanism capable of reducing cover opening key travel according to claim 1, wherein the first swing arm (510) and the second swing arm (520) are distributed in a V shape.

10. The cover opening and closing mechanism capable of reducing the cover opening and closing key stroke according to claim 1, wherein the upper fixing member (100) is provided with a convex column (110), and the cover opening transmission member (500) is rotatably sleeved on the convex column (110).