CN220500299U - Printer with a printer body - Google Patents

Abstract

The utility model provides a printer, which comprises a shell, a cover body and a printer core, wherein the cover body can be rotatably supported on the shell around a first rotation axis, the printer core comprises an upper bracket, a lower bracket, a rubber roller, a printing head and a locking piece, the upper bracket is rotatably supported on the lower bracket around a second rotation axis parallel to the first rotation axis, one of the rubber roller and the printing head is arranged on the upper bracket, and the other of the rubber roller and the printing head is arranged on the lower bracket; the first rotation axis is perpendicular to the axis of the rubber roller, the locking piece is provided with a locking position and an unlocking position, the cover body comprises a pushing structure and is provided with a first rotation angle and a second rotation angle which rotate relative to the shell, the second rotation angle is not smaller than the first rotation angle, and at least part of the locking piece is positioned on the moving track of the pushing structure; when the cover body is positioned at a first rotation angle, the locking piece is pushed to an unlocking position by the pushing structure; when the cover body is positioned at the second rotation angle, the cover body applies a force to the upper bracket towards the direction of opening the upper bracket.

Description

Printer with a printer body

Technical Field

The present utility model relates to printers.

Background

A small printer having a cover opening structure generally includes a housing, a cover rotatably supported on the housing about a first rotational axis, and a printer core. The printer core comprises a rubber roller and a printing head which are arranged in a split mode, one of the rubber roller and the printing head is arranged in the shell, and the other one of the rubber roller and the printing head is arranged on the cover body and can be moved in a carrying mode by the cover body. Wherein, the first rotation axis is parallel to the axis of the rubber roller.

In such printers, if it is necessary to provide a sensor, a display, a printhead, and other electrical components in the cover, it is inevitable to arrange wiring extending from a power source in the housing to the electrical components in the cover. The wiring generally enters the cover body from the rotating connection position of the cover body and the shell, and the wiring arrangement mode provides certain requirements for structural design of the printer, bending resistance of the wiring and manufacturing precision of the printer, and improves the failure rate of the printer to a certain extent.

Japanese patent publication No. JP3210425U discloses a printer cartridge including a lower bracket, an upper bracket rotatably supported to the lower bracket about a second rotation axis, a rubber roller, a print head, and a locking member for locking the upper bracket to the lower bracket. One of the rubber roller and the printing head is arranged on the lower bracket, the other one of the rubber roller and the printing head is arranged on the upper bracket and can be carried by the upper bracket to move, and the projection of the second rotation axis line and the projection of the axis line of the rubber roller in the vertical direction are mutually perpendicular. When the printer core is configured in the printer, the flexible circuit board can enter the upper bracket from one end of the upper bracket, which is close to the second rotation axis, so as to supply power to each power utilization part on the upper bracket. The flexible circuit board is not required to be buried in the shell of the printer, so that the complexity of wiring of the printer is greatly reduced, and meanwhile, the maintenance of the printer is convenient, and the failure rate of the printer is reduced.

However, in the prior art, the small printer which is provided with the printer core and can drive the upper bracket of the printer core to open in the uncapping process is not provided, and one technical problem is that the upper bracket can be driven to rotate through the cover body only after the locking piece is unlocked when the cover is opened, so that the upper bracket is separated from the lower bracket.

Disclosure of Invention

In order to solve the above-mentioned related technical problems, an object of the present utility model is to provide a printer with the above-mentioned printer core, which can unlock the locking member first and then pull the upper bracket when the cover is opened.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the printer comprises a shell, a cover body and a printer core, wherein the cover body can be rotatably supported on the shell around a first rotation axis, the printer core comprises an upper bracket, a lower bracket, a rubber roller, a printing head and a locking piece, the upper bracket is rotatably supported on the lower bracket around a second rotation axis parallel to the first rotation axis, one of the rubber roller and the printing head is arranged on the upper bracket, and the other of the rubber roller and the printing head is arranged on the lower bracket; the projection of the first rotation axis and the axial lead of the rubber roller in the vertical direction are perpendicular to each other, the locking piece is provided with a locking position for locking the upper bracket on the lower bracket and an unlocking position for allowing the upper bracket to rotate relative to the lower bracket, the cover body comprises a pushing structure and a linkage part and is provided with a first rotation angle and a second rotation angle which rotate relative to the shell, and the second rotation angle is not smaller than the first rotation angle; when the cover body is positioned at a first rotation angle, the locking piece is pushed to the unlocking position by the pushing structure; when the cover body is positioned at the second rotation angle, the linkage part applies a force towards the direction of opening the upper bracket to the upper bracket.

In the above technical solution, preferably, at least a portion of the upper bracket is located on a movement track of the linkage part; in the process that the cover body rotates from the closed state to the second rotation angle, the linkage part does not contact the upper bracket; when the cover body is positioned at the second rotation angle, the linkage part is contacted with the upper bracket so as to allow the cover body to pull the upper bracket towards the opening direction. Still further preferably, the upper bracket includes a bracket body and a housing fixedly connected to an upper side of the bracket body, and the housing and the bracket body form a movable space; the linkage part comprises a first cover opening clamping hook at least partially extending into the movable space.

In the above technical solution, preferably, the cover further includes a pushing member capable of pushing the upper bracket during the closing process, and the upper bracket has a pushing frame position contacting with the pushing member during the closing process; when the cover body is in a closed state, the thrust part and the pushing frame are provided with a first space in the vertical direction.

In the above preferred solution, it is further preferred that the locking member is a hook lock, and the lower bracket is configured with a cross bar adapted to the hook lock and extending along the first rotation axis direction; when the cover body is in a closed state, the contact position of the hook lock and the cross bar is positioned on one side, close to the first rotation axis, of a vertical line passing through the cross bar. It may be further preferred that the cover has a first side wall remote from the first axis of rotation, and the housing has a second side wall remote from the first axis of rotation; when the cover body is in a closed state, a second interval in the vertical direction is arranged between the first side wall and the second side wall, the second side wall and the first rotating axis have a second length in the horizontal direction perpendicular to the first rotating axis, the pushing frame position and the first rotating axis part have a first length in the horizontal direction perpendicular to the first rotating axis, and the ratio of the first interval to the first length is smaller than the ratio of the second interval to the second length.

In the above preferred solution, it is further preferred that the upper bracket is further provided with an elastic buffer arm extending toward the inner wall of the cover, and when the cover is in the closed state, a third distance is formed between the elastic buffer arm and the inner wall of the cover, the elastic buffer arm and the first rotation axis have a third length in a horizontal direction perpendicular to the first rotation axis, the pushing frame position and the first rotation axis have a first length in a horizontal direction perpendicular to the first rotation axis, and a ratio of the first distance to the first length is greater than a ratio of the third distance to the third length.

In the above preferred embodiment, it is further preferred that the cover further includes a linking portion, and the linking portion may contact the upper bracket when the cover is at the second rotation angle, so as to allow the cover to pull the upper bracket; the thrust component is integrated on the linkage part.

In the above technical solution, preferably, the locking member is a hook lock, the hook lock includes a hook lock rotating shaft rotatably connected to the upper bracket around a third rotation axis, a locking portion, and a force receiving portion disposed at an angle with the locking portion, the third rotation axis is parallel to the first rotation axis, and the force receiving portion is located on a rotation track of the pushing structure.

In the above preferred aspect, it is further preferred that the force receiving portion is located on a side of the third rotation axis away from the first rotation axis as viewed from a direction of the first rotation axis.

In the above preferred solution, it is further preferred that the pushing structure is a second cover opening hook extending toward the direction in which the force receiving portion is located, and when the cover body is in the closed state, the second cover opening hook is disposed at intervals on the force receiving portion.

In the above technical solution, preferably, the printer further includes an uncapping mechanism, the uncapping mechanism includes a hook movably disposed on the cover body and a trigger member capable of contacting the hook, and the trigger member is movably disposed in the housing; the clamping hook is provided with a first position capable of locking the cover body on the shell and a second position allowing the cover body to open and close relative to the shell; the hook and/or the trigger piece is provided with a first contact surface, and the first contact surface is configured so that when the trigger piece is abutted against the hook, at least part of the acting force applied by the trigger piece to the hook forces the hook at the first position to move towards the second position, and at least part of the acting force applied by the trigger piece to the hook forces the hook at the second position to move towards the direction of opening the cover body.

In the printer provided by the technical scheme of the utility model, in the process that the cover body is opened from the closed state to the first rotation angle, the pushing structure of the cover body contacts and pushes the locking piece to the unlocking position; when the cover body is opened to a second rotation angle, the linkage applies a force to the upper bracket towards the direction of opening the upper bracket, so that the upper bracket is driven to move. It can be appreciated that the cover provided by the utility model can automatically unlock the locking member first and then drive the upper bracket of the printer core in the opening process.

Drawings

FIG. 1 is a schematic perspective view of a printer according to a preferred embodiment of the present utility model;

FIG. 2 is a partial cross-sectional view of a printer according to a preferred embodiment of the present utility model, with the cover at a first angle of rotation;

FIG. 3 is a partial cross-sectional view of a printer according to a preferred embodiment of the present utility model, with the cover at a second angle of rotation;

FIG. 4 is a cross-sectional view of a printer according to a preferred embodiment of the present utility model, wherein the hook is in a first position;

FIG. 5 is a second cross-sectional view of the printer according to the preferred embodiment of the present utility model, wherein the hook is at the second position;

FIG. 6 is a perspective view of one of the door button, actuator arm, trigger and hook in a preferred embodiment of the present utility model;

FIG. 7 is a second perspective view of the door button, actuator arm, trigger and hook in accordance with the preferred embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a printer according to a preferred embodiment of the present utility model;

fig. 9 is a schematic diagram of a printer according to a preferred embodiment of the present utility model.

Detailed Description

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

Fig. 1 to 9 show a printer provided by the present utility model, the printer including a casing 1, a cover 2, and a printer core 31. The housing 1 includes an upper opening 11, and the cover 2 is rotatably supported on the housing 1 about a first rotation axis (not shown in the drawings) to selectively open or close the upper opening 11. The printer core 31 includes an upper bracket 312 and a lower bracket 311, the upper bracket 312 being rotatably supported on the lower bracket 311 about a second rotation axis (not shown in the figure) parallel to the first rotation axis, the lower bracket 311 being disposed within the housing 1. The printer core 31 further includes a rubber roller 3111 and a print head 3121, the rubber roller 3111 and the print head 3121 being disposed opposite to the upper bracket 312 and the lower bracket 311. In the present embodiment, the print head 3121 is disposed on the upper bracket 312, the rubber roller 3111 is disposed on the lower bracket 311, and in some simple alternatives, the print head 3121 may be disposed on the lower bracket 311, and the rubber roller 3111 is disposed on the upper bracket 312 without being limited thereto.

The upper holder 312 is movable to be carried by the cover 2. The printer further includes a receiving bay 32, the receiving bay 32 being configured to receive a print paper roll, the print paper roll being removably disposed within the receiving bay 32. When the printer works, the cover body 2 is in a closed state, printing paper passes through the gap between the printing head 3121 and the rubber roller 3111, the rubber roller 3111 supports the printing paper against the printing head 3121 from the lower side and drives the printing paper to move, and the printing head 3121 can print on the upper side surface of the printing paper; when the cover 2 is opened, the receiving bin 32 is exposed to the outside, and the upper bracket 312 and the lower bracket 311 of the printer core 31 are opened, so that a user can replace a printing paper roll and place the printing paper between the glue roller 3111 and the print head 3121. In this embodiment, the axis of the glue roller 3111 and the projection of the first rotation axis of the cover 2 in the vertical direction are perpendicular to each other, and the type of cover opening is a side opening.

In the present application, the "closed state" of the cover 2 means a state in which the cover 2 is locked to the housing 1 and is not subjected to an external force. In the present application, the extending direction of the first rotation axis is taken as the front-rear direction, wherein the printer core 31 is located on the front side of the receiving bin 32; the extending direction of the axis of the rubber roller 3111 is left and right when the cover 2 is in the closed state, with the lock mechanism 313 (see below) being located on the left side of the first rotation axis.

The printer cartridge 31 further includes a locking mechanism 313 that locks the cartridge upper bracket 312 to the lower bracket 311, and the locking mechanism 313 can controllably release the locked state of the upper bracket 312 and the lower bracket 311. The cover 2 further includes a linkage portion 21 and a pushing structure 22, and the cover 2 has a first rotation angle and a second rotation angle that rotate relative to the housing 1, where the second rotation angle is not smaller than the first rotation angle. Wherein, the upper bracket 312 is at least partially located on the moving track of the linkage part 21, and the locking mechanism 313 is at least partially located on the moving track of the pushing structure 22. The cover 2 unlocks the locking mechanism 313 at the first rotation angle, the linking part 21 contacts with the upper bracket 312 when the cover 2 continues to rotate to the second rotation angle, and the upper bracket 312 is continuously pulled by the linking part 21 to rotate relative to the lower bracket 311 in the process that the cover 2 passes over the second rotation angle and is continuously opened. Since the upper bracket 312 is pulled by the linkage part 21, the upper bracket 312 is not pulled by the cover 2 continuously by the locking mechanism 313, the transmission effect is good and the weaker hook lock 3131 (see below) can be protected from being pulled by the cover 2.

The printer further includes an opening spring 5 connected between the housing 1 and the cover 2, and the opening spring 5 may be, but not limited to, a torsion spring or the like. In the process of opening the cover, the cover 2 rotates to a first rotation angle, and at this time, the cover 2 drives the locking mechanism 313 to unlock. When the cover 2 is rotated to the second rotation angle, the interlocking portion 21 of the cover 2 contacts the upper bracket 312. When the cover 2 is opened from the closed state to the first rotation angle, the rotation power required for the cover 2 is at least partially provided by the cover opening spring 5, and when rotated to be greater than the second rotation angle, the rotation power required for the cover 2 and the upper bracket 312 of the movement 31 is all provided by the cover opening spring 5.

The locking mechanism 313 includes a locking member disposed on the upper bracket 312 and a mating member disposed on the lower bracket 311 and adapted to the locking member. In this embodiment, the locking member is a hook 3131 and the mating member is a rail 3132 extending in the direction of the first axis of rotation. The locking mechanism 313 further includes an elastic member (not shown) coupled to the hook lock 3131, and the hook lock 3131 is rotatably coupled to the upper bracket 312. The resilient member applies a force to the hook lock 3131 that holds the lock down bracket 311. The cover body 2 is opened from the closed state to the first rotation angle to drive the hook lock 3131 to rotate so as to realize unlocking.

The hook lock 3131 is snap-fit to the cross bar 3132 in an initial state. The hook lock 3131 has a locking position to lock the upper bracket 312 to the lower bracket 311 and an unlocking position to allow the upper bracket 312 to rotate relative to the lower bracket 311. It will be appreciated that to avoid interference with the cover 2 pulling on the upper bracket 312, the hook lock 3131 should be switched to the unlocked position before the cover 2 pulls on the upper bracket 312 (i.e., at the latest when the cover 2 is rotated to the second rotation angle).

Specifically, the pushing structure 22 includes a second cover hook 221 extending in a direction of the hook 3131, the hook 3131 includes a locking portion (not shown) capable of locking the cross bar 3132, a hook rotating shaft (not shown) defining a third rotation axis parallel to the first rotation axis, and a force receiving portion (not shown) extending in a direction of the second hook 221 and capable of applying a force to the second hook 221. The force receiving portion of the hook lock 3131 is arranged on a side of a vertical line passing through the cross bar 3132, which is away from the first rotation axis, as viewed in the front-rear direction.

When the cover body 2 is closed, the second cover opening hook 221 is located at the lower side of the stress part of the hook lock 3131 and is spaced from the stress part, so that the hook lock 3131 is prevented from being switched to an unlocking state under the driving of the vibrating cover opening hook 221 when the cover body 2 is impacted; the locking portion of the hook lock 3131 locks the cross bar 3132 and the locking mechanism 313 is in a locked state. In the process of opening the cover body 2 from the closed state to the first rotation angle, the second cover opening hook 221 rotates along with the cover body 2 around the first rotation axis, the second cover opening hook 221 contacts the force-bearing portion of the hook lock 3131 in the rotation process and forces the hook lock 3131 to rotate along the unlocking direction by the force-bearing portion, and the locking portion of the hook lock 3131 is gradually separated from the cross bar 3131 in the process. When the cover 2 is rotated to the first rotation angle, the locking portion of the hook lock 3131 is completely disengaged from the cross bar 3131, and the locking mechanism 313 is rotated from the locked state to the unlocked state.

In other embodiments, the locking member in the locking mechanism may also be a rotatable buckle, a sliding block lock capable of moving horizontally, or other structures, and the matching member in the locking mechanism may also be a limiting protrusion integrated on the lower bracket, where the locking mechanism satisfies that the upper bracket of the printer core may be locked on the lower bracket and the cover body may be unlocked (e.g. the sliding block lock is pushed by the pushing structure of the cover body to slide in the direction of unlocking) under the premise that the locking mechanism satisfies the condition that the upper bracket of the printer core is locked on the lower bracket and the cover body is locked to the first rotation angle from the closed state, the specific structure of the locking mechanism does not limit the protection scope of the application.

The upper support 312 includes a housing 3122, the housing 3122 defining a movable space 3123. At the second rotation angle, the cover 2 is pushed against the inner top wall of the movable space 3123 (see below) by the first cover latch 211 (see below) to drive the upper bracket 312 to rotate. Specifically, the upper support 312 includes a support body 3124 for supporting the print head 3121 and a housing 3122 connected to the support body 3124, the housing 3122 being located on an upper side of the support body 3124, the housing 3122 may provide protection against damage to the support body 3124. The housing 3122 is partially disposed on the upper side of the stand body 3124 and spaced apart from the stand body 3124 to form a movable space 3123, and the coupling part 21 includes a first cover latch 211 extending into the movable space 3123. When the cover 2 is closed, the first cover opening hook 211 is located on the upper side of the support body 3124, and a gap is left between the first cover opening hook 211 and the support body 3124, and the gap can be used as a buffer space between the cover 2 and the upper support 3124, so as to prevent external impact from being transmitted to the movement 31 through the first cover opening hook 211 when the cover 2 is subjected to external impact. When the cover 2 rotates to the second rotation angle, the first cover hook 211 abuts against the top wall of the movable space 3123.

In other embodiments, the structural design of the housing or the movable space may be omitted, and the technical effects that the cover pulls the upper bracket by the linkage part after the second rotation angle can be achieved when the upper bracket has at least a portion (the side portion of the upper bracket) located on the rotation path of the linkage part, the linkage part is separated from the upper bracket between the closed state of the cover and the second rotation angle (excluding both end points), and the linkage part contacts the upper bracket when the cover is located at the second rotation angle.

In other embodiments, the linkage part may also be a pull ring (the tension spring is pulled when the rotation angle of the cover is not smaller than the second rotation angle), a flexible connecting piece (such as a rope and a chain with two ends respectively connected with the cover and the upper bracket, the flexible connecting piece is pulled when the rotation angle of the cover is not smaller than the second rotation angle), etc.; in addition, a hook lock or a hook structure may be disposed on the upper bracket of the printer core, and a movable space (a relevant wall surface forming the movable space, i.e. a linkage part of the cover in this embodiment) adapted to the upper bracket may be disposed on the cover, and when the rotation angle of the cover is not smaller than the second rotation angle, the hook lock or the hook on the upper bracket abuts against the wall surface of the movable space of the cover, so that the cover may pull the upper bracket of the printer core. Therefore, the specific structure of the linking part does not limit the protection scope of the utility model on the premise that the linking part of the cover body can apply force to the upper bracket of the printer core towards the direction of opening the upper bracket when the cover body is opened to the second rotation angle.

In the present embodiment, when the cover 2 is in the closed state, the print head 3121 of the upper bracket 312 abuts against the rubber roller 3111 on the lower bracket 311, the pushing structure 22 of the cover 2 is spaced from the locking mechanism 313, and the linking portion 21 of the cover 2 is spaced from the upper bracket 312 (i.e. the first cover hook 211 of the linking portion 21 is spaced from the bracket body 3124).

In the present embodiment, during the closing process of the cover 2, the linking portion 21 at least correspondingly pushes against the upper bracket 312. In the closing process of the cover 2, the second cover hook 221 of the linking portion 21 correspondingly pushes against the upper side of the support body 3124 to push the upper support 312 to close against the lower support 311.

As shown in fig. 2, the locking portion of the hook lock 3131 has an inclined surface (not shown) at the bottom and inclined toward the lower left and a contact surface (not shown) that is arc-shaped and contacts the cross bar 3132 in the locked state. When the locking mechanism 313 is in the locked state, the contact position between the hook lock 3131 and the cross bar 3132 is located at a side of a vertical line passing through the center of the cross bar 3132 and close to the first rotation axis, as viewed from the front-rear direction, so that when the hook lock 3131 is vibrated by impact, the force applied to the hook lock 3132 by the cross bar 3132 can be decomposed into a component force directed toward the first rotation axis, i.e., a force directed in the locking direction of the hook lock 3131, thereby preventing the hook lock 3132 from being separated from the cross bar 3131.

During closing of the cover 2, the inclined surface of the hook lock 3132 first contacts the cross bar 3131, and the cross bar 3131 applies a force to the hook lock 3132 with a force component toward the left, i.e., a force component toward the unlocked position of the hook lock 3132, to open the hook lock 3132. After the inclined surface of the hook lock 3132 is disengaged from the cross bar 3131, the contact surface of the hook lock 3132 contacts the cross bar 3131 and moves along the outer peripheral surface of the cross bar 3131 until the locking position is reached.

In the locked position, the contact position of the hook lock 3131 with the cross bar 3132 is not the lowest point of the outer peripheral surface of the cross bar 3131. It will be appreciated that during locking, the upper bracket 312 will be required to move the contact surface of the catch 3131 past the lowest point of the outer peripheral surface of the rail 3131. In addition, the main body of the locking part is inclined during the locking process, so that the distance between the contact surface and the center of the rotating shaft of the hook lock in the vertical direction is reduced (as shown in fig. 3). The two factors described above cause the lowest point of the movement path of the upper bracket 312 during the closing of the cover 2 to be located below the position where the upper bracket 312 is located when the cover 2 is in the closed state.

Referring to fig. 9, a gap is maintained between the cover 2 and the lower case 1 when the cover 2 is in a closed state. Wherein, the left wall of the cover 2 and the left wall of the housing 1 have a first gap d1 in the vertical direction, and the left wall of the housing 1 and the rotation center a of the cover 2 have a first length L1 in the left-right direction. The upper bracket body 3124 has a push-bracket position that contacts the first cover hook 211 during the closing of the cover 2. When the lid 2 is in the closed state, the pushing frame position of the first lid hook 211 and the upper support body 3124 has a second gap d2 in the vertical direction, the rotation center a of the first lid hook 211 and the lid 2 has a second length L2 in the left-right direction, and the ratio of the first interval d1 to the first length L1 should be at least greater than the ratio of the second interval d2 to the second length L2, so that the lid 2 after passing over the closed position of 0 ° relative to the housing 1 and before not touching the housing 1 (the touching position of the lid 2 with the housing 1 is at the left wall during the closing process of the lid 2) is still in contact with the upper support body 3124 for at least a period of travel, so as to force the upper support body 3124 to move to the lower side of the position of the upper support body 3124 when the lid 2 is in the closed state, and then drive the contact surface of the hook 3132 to pass over the lowest position of the outer peripheral surface of the cross bar 3131. The margin of the ratio of the first distance d1 to the first length L1 to the ratio of the second distance d2 to the second length L2 is determined according to specific factors such as the radian of the contact surface of the hook lock 3131, the radius and the lowest point position of the cross bar 3132, and the inclination angle of the hook lock 3131 during the locking process.

In the present embodiment, the cover 2 is rotatably provided on the housing 1 about a first rotation axis, and the upper bracket 312 is rotatably provided on the lower bracket 311 about a second rotation axis. The lock mechanism 313 is disposed at an end portion of the printer core 31 on a side away from the second rotation axis. The pushing structure 22 is located at an end of the cover 2 away from the first rotation axis, and when the cover 2 rotates at the first rotation angle, the pushing structure 22 of the cover 2 drives the locking mechanism 313 to unlock. The interlocking portion 21 of the cover 2 is located between the first rotation axis and the pushing structure 22. The cover 2 abuts against the upper wall of the movable space 3123 at the second rotation angle to drive the upper bracket 312 to rotate. When the cover 2 is completely opened, the elastic member drives the locking mechanism 313 to return to the initial position so that the cover 2 and the upper bracket 312 return to the initial relative position.

Further, the hook lock 3132 is at the "unlock position" all the time when the cover 2 passes over the second rotation angle until being completely opened, and after the cover 2 is completely opened, the hook lock 3132 rotates in the locking direction by the elastic force of the elastic member and drives the upper bracket 312 to move in the direction of the cover 2; thereafter, the upper bracket 312 collides with the first cover hook 211 and is rebounded; then, the upper bracket 312 drives the hook lock 3132 to rotate in the unlocking direction and compress the elastic member, so that the upper bracket 312 continuously vibrates until the upper bracket is stabilized under the damping action of the elastic member.

In order to avoid damage to the upper bracket 312 caused by collision with the first cover hook 211 during repeated vibration, the present embodiment is further provided with an elastic buffer arm (not shown) located on the upper bracket 312, the elastic buffer arm extending toward the inner wall of the cover 2 and having a third distance from the inner wall of the cover 2 when the cover 2 is in the closed state, the rotation center a of the elastic buffer arm and the cover 2 having a third length in the left-right direction, and the ratio of the third distance to the third length is smaller than the ratio of the second distance d2 to the second length, so that the elastic buffer arm contacts the inner wall of the cover 2 before the upper bracket 312 collides with the first cover hook 211, thereby buffering the upper bracket 312.

It can be understood that the first cover hook 211 provided in this embodiment integrates the function of a linkage part that pulls the upper bracket 312 to open during the opening process of the cover 2 and a "pushing component" that pushes the upper bracket 312 to close during the closing process of the cover 2. In other embodiments, the interlocking part and the thrust component which are different from each other may be provided, that is, when the cover is opened to not smaller than the second rotation angle, the upper bracket is pulled to be opened by the interlocking part of the cover, and in the cover closing configuration, the cover is pushed to be closed by the thrust component on the cover, and the thrust component may be configured into any shape or structure that can be contacted with the upper bracket.

The printer further includes a cover opening mechanism. The cover opening mechanism comprises a hook component 42 movably arranged on the cover body 2 and a trigger piece 41 capable of contacting the hook component 42. The hook component 42 includes a hook 421 movably disposed on the cover 2, where the hook 421 has a first position capable of locking the cover 2 on the housing 1 and a second position allowing the cover 2 to open and close relative to the housing 1. The hook 421 and/or the trigger 41 has a first contact surface, where the first contact surface is configured such that when the trigger 41 abuts against the hook 421, at least a portion of the force applied by the trigger 41 to the hook 421 forces the hook 421 at the first position to move toward the second position, and at least a portion of the force applied by the trigger 41 to the hook 421 forces the hook 421 at the second position to move toward the direction of opening the cover 2.

The triggering member 41 can drive the hook 421 to move from the first position to the second position. When the hook 421 is at the second position, the trigger member 41 can abut against the hook 421 and provide a force for at least partially driving the cover 2 to open relative to the housing 1.

In this embodiment, the housing 1 includes a fastening hole 12, and a protrusion (not shown) adapted to the fastening hook 421 is disposed in the fastening hole 12. When the hook 421 is located at the first position, it is locked to the cover 2 on the housing 1 by engaging the protrusion in the locking hole 12. The hook 421 is located at the second position and is separated from the protrusion in the fastening hole 12, so as to allow the cover 2 to rotate relative to the housing 1.

In other embodiments, the hook assembly may be other forms of mechanical engagement structures, including but not limited to latch structures, etc., so long as it moves and includes two positions fixed relative to the cover.

In this embodiment, the hook 421 is rotatably connected to the inner side surface of the cover 2 facing the housing 1. The hook assembly 42 further includes an elastic member 422 connected to the hook 421, and the elastic member 422 may be a spring. Specifically, the elastic member 422 is an elastic arm connected to the hook 421, and the elastic arm drives the hook 421 to rotate to the protrusion of the engaging hole 12. That is, the elastic member 422 applies a force to the hook 421 directed to the first position. The two sides of the rotating shaft of the hook 421 are provided with a first limiting piece 423 and a second limiting piece 424, when the hook 421 is positioned at the first position, the first limiting piece 423 is abutted against the cover body 2, and the second limiting piece 424 is separated from the cover body 2; when the hook 421 is located at the second position, the second limiting member 424 abuts against the cover 2 and the first limiting member 421 is separated from the cover 2. Thus, the movable stroke of the hook 421 is limited between the first and second positions. The elastic arm can apply a force to the hook 421 towards the first position, when the trigger member 41 pushes the hook assembly 42 to move from the first position to the second position, the elastic arm accumulates elastic force, and when the external force acting on the trigger member 41 is removed, the hook assembly 42 can be restored to the first position.

The hook assembly 42 further includes a hook shaft 425, the hook assembly 42 is rotatably connected to the hook shaft 425, and the hook shaft 425 and the elastic member 422 are respectively disposed on two sides of the hook assembly 42. When the lid 2 is in the closed state, the contact position of the hook 421 with the protrusion in the catch hole 12 is located on one side of the direction from the first position to the second position along the vertical line passing through the center of the hook rotation shaft 425. Taking the present embodiment as an example, the second position is located on the right side of the first position, and the first position points in the direction of the second position, that is, in the rightward direction. Thus, the contact position of the hook 421 and the protrusion in the hook hole 12 is located on the right side of the vertical line passing through the center of the hook rotation shaft 425.

When the cover 2 is vibrated by external impact, the protrusion in the fastening hole 12 applies a downward force to the hook 421, and the above structural design can make the force applied by the protrusion generate a moment that forces the hook 421 to rotate (i.e. lock) around the axis of the hook shaft 425 along the second position toward the first position, so as to avoid the hook 421 from unhooking.

In the present embodiment, the hook 421 is switched between the first and second positions by rotating. In other embodiments, the catch is also translatable between a first position locking the cover to the housing and a second position allowing the cover to rotate relative to the housing. For example: the trip is connected on the lid in a sliding way, and the lid is through setting up corresponding spacing part and is limited the stroke of trip between first, second position. Meanwhile, the cover body can apply an acting force towards the first position to the clamping hook in a mode of arranging a spring, a magnetic force piece and the like, so that the clamping hook can be kept at the first position under the condition of no external force.

In this embodiment, the trigger 41 is controllably movable. Specifically, the door button 6 moves the trigger 41 up and down by an actuator arm 7. Referring to fig. 6 to 7, the driving arm 7 is rotatably connected to the housing 1, and the driving arm 7 includes a trigger arm 71 disposed at a lower side of a rotation shaft thereof, and the trigger member 41 is fixedly connected to the driving arm 7 and disposed at a right side of the rotation shaft of the driving arm 7. When the door button 6 is pressed down, the lower end of the door button 6 pushes the transmission arm 7 to rotate, and correspondingly, the trigger 41 moves upward.

It will be appreciated by the reader that the present embodiment provides a non-limiting example of a drive arm that can be constructed in any configuration that is sufficient to transfer the force applied by the user to the door button to the trigger and cause the trigger to move in a prescribed direction.

In addition, because this type of printer is lighter in weight, if the cover-opening button of horizontal push type is adopted, then need the user hold the printer in order to avoid the printer to topple over because of receiving the effort of horizontal direction when uncapping. The cover opening button 6 of the present embodiment is configured to move in the vertical direction to drive the trigger 41 to move upward, so that the user only needs to place the housing 1 on the placement surface, and the user can open and close the cover body 2 by pressing down the cover opening button 6 with a single finger, which is more convenient and quick. The rotating shaft of the driving arm 7 can also be provided with a torsion spring, and the torsion spring can drive the driving arm 7 to always butt against the lower end of the cover opening handle.

However, it can be understood that the technical solution of the cover opening mechanism provided in the present application may also be applied to a horizontally pressed cover opening button, and accordingly, in the form of the cover opening button, the trigger member may be directly connected to the cover opening button and defined to move in a horizontal direction, and the trigger member and/or the hook are configured with a first contact surface, so that the trigger member forces the hook located at the first position to move toward the second position and forces the hook located at the second position to move toward the direction of opening the cover in the horizontal moving process.

In addition, in other embodiments, the cover opening button provided in this embodiment may be replaced by a cover opening knob, where at least a portion of the cover opening knob abuts against the driving arm and applies a force to the driving arm that can move the trigger in a predetermined direction during the rotation of the cover opening knob by the user.

The trigger 41 includes at least a first travel and a second travel. The first movement stroke at least corresponds to driving the hook assembly 42 to change from the first position to the second position. The second movement stroke at least corresponds to driving the cover 2 to open relative to the housing 1. The first movement stroke and the second movement stroke may be continuous or may be performed in sections, and in the example where the trigger member 41 moves upward, the trigger member 41 may perform the first movement stroke first and then may perform the second movement stroke directly, or may have a free stroke between the first movement stroke and the second movement stroke, etc.

In this embodiment, the first contact surface is an inclined surface. When the trigger 41 moves, the first contact surface can at least decompose the force applied by the trigger 41 to the hook 421 into a first force forcing the hook 421 in the first position to move toward the second position. In the present embodiment, the lower end of the hook 421 includes a first contact slope 4211, the first contact slope 4211 faces downward and leftward, and the upper end of the trigger member 41 includes a second contact slope 411, the second contact slope 411 faces upward and rightward, and the second contact slope 411 abuts against the first contact slope 4211 when moving upward. Under the cooperation of the first contact slope 4211 and the second contact slope 411, the force applied by the trigger member 41 to the hook 421 is perpendicular to the first contact slope and the second contact slope and directed to the hook 421, and the force can be at least partially decomposed into a first force towards the right side (i.e. towards the second position), so as to force the hook 421 located at the first position to move towards the second position and disconnect from the latch hole 12. In this process, since the hooks 421 are restrained by the protrusions in the catching holes 12 from the upper side, that is, the hooks 421 do not have a tendency to move upward in this process, the cover 2 is substantially kept stationary. The hook component 42 is rotatably disposed on the cover 2, and the first acting force is used to drive the hook component 42 to rotate. In other embodiments, the first contact surface may be configured as an arc surface, and only one of the hook and the trigger member may be configured as the first contact surface, so long as the first contact surface may enable the force applied by the trigger member to the hook to be decomposed by a vector into a first force forcing the hook to move from the first position to the second position.

When the trigger 41 moves, the contact slope can at least decompose the force applied to the hook 421 by the trigger 41 into a second force forcing the hook 421 in the second position to move toward the direction of opening the lid 2. As can be seen from the above, due to the angular relationship between the first contact slope 4211 and the second contact slope 411, the force applied by the trigger member to the hook 421 can be correspondingly decomposed into the second upward force, and the hook 421 at the second position is limited by the second limiting member 424 and the trigger member 41 from the front-back direction, and the cover 2 and the hook 421 are pushed by the trigger member 41 in the opening direction of the cover 2.

The hook 421 and/or the trigger 41 has a second contact surface. Specifically, the lower end of the hook 421 includes a second horizontal surface 4212 adjacent to or connected with the first contact slope 4211, the trigger member 41 includes a first horizontal surface 412 adjacent to or connected with the second contact slope 411, the second horizontal surface 4212 faces downward, and the first horizontal surface 412 faces upward. When the hook 421 moves to the second position, the first and second horizontal surfaces are contacted to change the direction of the force applied by the trigger piece 41 to the hook 421, so as to reduce the magnitude of the decomposed acting force pointing to the second position, i.e. more component force is used for pushing the cover 2 to open, so as to achieve better force transmission effect.

During the process of opening the cover 2, the rotation resistance of the cover 2 is mainly derived from the elastic force of the locking mechanism 313 and the resistance of the cross bar 3131 to the hook 3132 (including the force required to force the upper bracket 312 to move downward) during the process of rotating the cover 2 from the closed state to the first rotation angle (hereinafter referred to as the first stage), and the rest is derived from the dead weight of the cover 2. When the cover 2 is rotated from the first rotation angle to the second rotation angle (hereinafter referred to as a second stage), the rotation resistance of the cover 2 is derived from the gravity of itself. In the process (hereinafter referred to as a third stage) in which the cover 2 passes over the second rotation angle until the cover 2 is completely opened, the rotation resistance of the cover 2 is derived from the gravity of itself and the bracket 312 on the movement 31. In practical application, the weight of the cover 2 and the upper bracket 312 is small, and the resistance of the cross bar 3131 to the hook 3132 is large, so that the rotation power required in the first stage of the opening process of the cover 2 is significantly larger than that required in the second and third stages.

When the printer is opened, the trigger 41 forces the hook 421 to move to the second position to unlock the cover 2. Thereafter, the trigger 41 pushes the hook 421 and the cover 2 to move in the opening direction, and the process rotates from the closed state to the first rotation angle corresponding to the cover 2. With this structural design, the trigger 41 of the printer can transmit the force applied by the user to the door button 6 to the cover 2 to provide a partial rotational power of the cover 2 at the first stage. Therefore, the elastic force provided by the cover opening spring 5 configured by the printer can meet the rotation power required by the second stage and the third stage in the opening process of the cover body 2. Namely, the printer can select the cover opening spring 5 with weak elastic force to slow down the rotation speed of the cover body 2 in the second stage and the third stage and reduce the impact between the cover body 2 and the shell 1 when the cover body 2 is completely opened, thereby achieving the technical effects of protecting the cover body 2 and the shell 1.

It can be appreciated that when the hook 421 is moved from the second position toward the direction of opening the cover by the trigger 41, if the rotation angle of the cover 2 corresponding to the second stroke end of the trigger 41 is smaller than the first rotation angle (i.e. when the hook lock 3132 is not switched to the unlocking position), the hook 421 and the cover 2 still have a certain inertia, and the hook lock 3132 can be pulled continuously until the opening position is switched. However, in this case, there is a possibility that the latch 3132 fails to be unlocked, and thus, in a preferred embodiment, the latch further has a third position corresponding to the end of the trigger stroke, and the corresponding rotation angle of the cover is not smaller than the first rotation angle when the latch is in the third position, so as to ensure that the latch is switched to the unlocked position before the user removes the force acting on the door button.

The technical effects of the cover opening mechanism provided by the present utility model are described in this embodiment with the side-opening printer employing the printer core 31 as an example. However, the reader is aware that in a printer in which a rubber roller and a printing head are respectively arranged on a cover body and a shell, the axis of the rubber roller is parallel to the rotation axis of the cover body, and the rubber roller and the printing head are kept in a compressed state under the action of a locking piece when the cover body is closed, the cover opening mechanism provided by the utility model can also be adopted, so that the force applied to a cover opening button by a user overcomes the elastic force of the locking piece, and the printer can be provided with a cover opening spring with weaker elastic force. In this type of printer, the printhead or the glue roller may be pulled through the cover and then forced against the locking member by the printhead or the glue roller to force the locking member to move in the direction of the unlocked position.

The foregoing is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present utility model within the scope of the present utility model disclosed herein by this concept, which falls within the actions of infringing the protection scope of the present utility model.

Claims (12)

1. The printer comprises a shell, a cover body and a printer core, wherein the cover body can be rotatably supported on the shell around a first rotation axis, and the printer core is characterized by comprising an upper bracket, a lower bracket, a rubber roller, a printing head and a locking piece, wherein the upper bracket is rotatably supported on the lower bracket around a second rotation axis parallel to the first rotation axis, one of the rubber roller and the printing head is arranged on the upper bracket, and the other of the rubber roller and the printing head is arranged on the lower bracket; the projection of the first rotation axis and the projection of the axis of the rubber roller in the vertical direction are perpendicular to each other, the locking piece is provided with a locking position for locking the upper bracket on the lower bracket and an unlocking position for allowing the upper bracket to rotate relative to the lower bracket, the cover body comprises a pushing structure and a linkage part and is provided with a first rotation angle and a second rotation angle which rotate relative to the shell, and the second rotation angle is not smaller than the first rotation angle; when the cover body is positioned at a first rotation angle, the locking piece is pushed to the unlocking position by the pushing structure; when the cover body is positioned at the second rotation angle, the linkage part applies a force towards the direction of opening the upper bracket to the upper bracket.

2. The printer of claim 1, wherein at least a portion of the upper bracket is located on a movement track of the linkage part; in the process that the cover body rotates from the closed state to the second rotation angle, the linkage part does not contact the upper bracket; when the cover body is positioned at the second rotation angle, the linkage part is contacted with the upper bracket so as to allow the cover body to pull the upper bracket towards the opening direction.

3. The printer of claim 2, wherein the upper bracket comprises a bracket body and a housing fixedly connected to the upper side of the bracket body, the housing and the bracket body forming a movable space; the linkage part comprises a first cover opening clamping hook at least partially extending into the movable space.

4. The printer of claim 1 wherein said cover further comprises a pushing member for pushing said upper bracket during closing, said upper bracket having a pushing position for contacting said pushing member during closing; when the cover body is in a closed state, the thrust part and the pushing frame are provided with a first space in the vertical direction.

5. The printer of claim 4 wherein said locking member is a hook lock and said lower bracket is provided with a cross bar adapted to engage said hook lock and extending in the direction of said first axis of rotation; when the cover body is in a closed state, the contact position of the hook lock and the cross bar is positioned on one side, close to the first rotation axis, of a vertical line passing through the cross bar.

6. The printer of claim 5 wherein said cover has a first side wall remote from said first axis of rotation and said housing has a second side wall remote from said first axis of rotation; when the cover body is in a closed state, a second interval in the vertical direction is arranged between the first side wall and the second side wall, the second side wall and the first rotating axis have a second length in the horizontal direction perpendicular to the first rotating axis, the pushing frame position and the first rotating axis part have a first length in the horizontal direction perpendicular to the first rotating axis, and the ratio of the first interval to the first length is smaller than the ratio of the second interval to the second length.

7. The printer of claim 4, wherein the upper bracket is further provided with an elastic buffer arm extending toward the inner wall of the cover, a third distance is formed between the elastic buffer arm and the inner wall of the cover when the cover is in a closed state, the elastic buffer arm and the first rotation axis have a third length in a horizontal direction perpendicular to the first rotation axis, the pushing frame position and the first rotation axis have a first length in a horizontal direction perpendicular to the first rotation axis, and a ratio of the first distance to the first length is greater than a ratio of the third distance to the third length.

8. The printer of claim 4, wherein said cover further comprises a linkage, said linkage being adapted to contact said upper bracket when said cover is at said second angle of rotation to allow said cover to pull said upper bracket; the thrust component is integrated on the linkage part.

9. The printer of claim 1, wherein the locking member is a latch, the latch including a latch shaft rotatably coupled to the upper bracket about a third axis of rotation, a locking portion, and a force receiving portion disposed at an angle to the locking portion, the third axis of rotation being parallel to the first axis of rotation, the force receiving portion being located on a rotational path of the pushing structure.

10. The printer of claim 9, wherein said force receiving portion is located on a side of said third axis of rotation remote from said first axis of rotation, as viewed in the direction of said first axis of rotation.

11. The printer of claim 9 or 10, wherein the pushing structure is a second cover opening hook extending toward the direction in which the force receiving portion is located, and the second cover opening hook is disposed at intervals on the force receiving portion when the cover is in the closed state.

12. The printer of any one of claims 1-10, further comprising a cover opening mechanism, said cover opening mechanism comprising a hook movably disposed on said cover and a trigger member contactable with said hook, said trigger member being movably disposed within said housing; the clamping hook is provided with a first position capable of locking the cover body on the shell and a second position allowing the cover body to open and close relative to the shell; the hook and/or the trigger piece is provided with a first contact surface, and the first contact surface is configured so that when the trigger piece is abutted against the hook, at least part of the acting force applied by the trigger piece to the hook forces the hook at the first position to move towards the second position, and at least part of the acting force applied by the trigger piece to the hook forces the hook at the second position to move towards the direction of opening the cover body.