Module shell and printer

Abstract

The utility model belongs to the technical field of printers, and discloses a module shell and a printer, in the module shell, an abutting block is rotated relative to a main body and then slides in place to complete installation, and only part of the abutting block can extend out through rotation, so that the occupied space can be reduced, and in addition, the structure is simple. When the terminal panel is thick, the abutting block stretches out and moves close to the terminal panel, the abutting block stretches out relative to the main body, at the moment, the distance between the abutting block and the terminal panel changes slightly, and when the terminal panel is thick, the abutting block can still rotate to the middle position and then slide in the first direction relative to the main body. Therefore, the condition that the abutting block is in contact with the terminal panel before the abutting block completely extends out can be avoided, and the condition that the terminal panel cannot be stably clamped by the abutting block and the module panel is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a module housing and a printer. Background Art

[0002] In some instruments, a micro printer needs to be installed on the terminal panel of the instrument.

[0003] In this regard, the prior art provides an embedded micro-printer housing for installation on the front panel of an instrument. The printer housing includes a housing, a panel and a module. The panel is arranged on the housing. The module includes a slider base slidably arranged on the panel and a slider slidably arranged on the slider base. In the initial state, the slider base and the slider are completely placed in the groove of the housing. The housing, the slider base and the slider can pass through the mounting hole of the front panel as a whole, while the panel cannot pass through, and the panel can abut against the surface of the first side of the front panel. During installation, the slider base is slid to install the slider base in place, and then the slider is slid relative to the slider base. Since the slider is arranged on the slider base through an arc-shaped curved slideway, during the sliding process of the slider, the slider moves in a direction close to the front panel. At the same time, the slider extends out of the groove relative to the housing and the slider base, and the slider is further slid until the slider abuts against the second side of the front panel, thereby completing the installation of the printer housing through the panel and the slider abutting against the two sides of the front panel respectively.

[0004] However, this solution has the following two problems. On the one hand, after the slider base is installed in place, the slider is extended as a whole relative to the slider base, and the slider occupies a large space. On the other hand, when the slider is sliding relative to the slider base, the movement of the slider toward the front panel and the movement of extending out of the groove are performed simultaneously. If the front panel is thick, the slider may abut against the front panel before it is completely extended from the groove, thereby causing the slider and the panel to be unable to stably clamp the front panel of the instrument, further resulting in unstable installation of the printer housing. Utility Model Content

[0005] According to one aspect of the utility model, the utility model provides a module housing to solve the problem in the prior art that the slider occupies a large space and may cause the slider and the panel to be unable to stably clamp the front panel.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A module housing is used to be installed on a terminal panel, the terminal panel has a mounting hole extending along a first direction, and the module housing comprises:

[0008] A main body, used to be inserted into the mounting hole;

[0009] A module panel is fixedly arranged on the main body;

[0010] The abutment block can rotate relative to the main body and has an initial position and an intermediate position. When the abutment block is at the initial position, the main body and the abutment block are not interlaced with the terminal panel along the first direction. When the abutment block is at the intermediate position, the abutment block can also slide relative to the main body along the first direction and have a limited position. When the abutment block is at the limited position, the abutment block and the module panel can respectively abut against two sides of the terminal panel along the first direction;

[0011] A locking member, when the abutment block is located at a limiting position, the locking member can lock the position of the abutment block relative to the main body.

[0012] As a preferred solution of the module housing, the main body is provided with a first slide groove extending along a first direction, the abutment block is provided with a rotating shaft and can rotate relative to the main body through the rotating shaft, and the rotating shaft is slidably arranged in the first slide groove.

[0013] As a preferred embodiment of the module shell, the main body is further provided with a second slide groove parallel to the first slide groove, and the abutment block is provided with a slider. When the abutment block is located at an initial position, the slider is located outside the second slide groove, and when the abutment block is located at a middle position, the slider is located inside the second slide groove.

[0014] As a preferred solution of the module housing, the abutment block has a through hole, the locking piece is a bolt passing through the through hole, the bolt is threadedly connected to the main body, and the head of the bolt abuts against the abutment block, and there is a gap between the screw rod of the bolt and the hole wall of the through hole.

[0015] As a preferred solution of the module housing, it further comprises a reset elastic member, and the reset elastic member is used to provide an elastic force to move the abutment block away from the module panel.

[0016] As a preferred solution of the module housing, the abutment block has an avoidance groove, and when the abutment block is located between the middle position and the limit position, a part of the screw rod of the bolt extends into the avoidance groove.

[0017] As a preferred solution of the module shell, it also includes a limiting structure arranged on the main body, the abutment block is located between the module panel and the limiting structure, and when the abutment block is located at the initial position, the abutment block can abut against the limiting structure along a first direction.

[0018] As a preferred embodiment of the module shell, the abutment block has a first groove and a second groove which are spaced apart from each other, and a convex rib is provided between the first groove and the second groove. The module shell also includes a limit bar provided on the main body. When the abutment block is located at an initial position, the limit bar extends into the first groove, and at this time the first groove (35) extends along a first direction. When the abutment block moves from the initial position to an intermediate position, the limit bar can pass over the convex rib and move into the second groove, and at this time the second groove (36) extends along the first direction. At least one of the convex rib and the limit bar is elastic.

[0019] As a preferred solution of the module housing, the main body has a mounting groove, when the abutment block is located at an initial position, the abutment block is located in the mounting groove, when the abutment block is located at a limiting position, part of the abutment block extends out of the mounting groove.

[0020] According to another aspect of the utility model, a printer is provided, including a printing module and the above-mentioned module housing, wherein the module housing is used to be installed on a terminal panel, and the printing module is arranged in the module housing and is used to print on a print medium.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a module housing, which is used to be installed on a terminal panel. The terminal panel has a mounting hole extending along a first direction. The module housing includes a main body, a module panel, an abutment block and a locking member. The main body is used to be inserted into the mounting hole; the module panel is fixedly arranged on the main body; the abutment block can rotate relative to the main body and has an initial position and an intermediate position. When the abutment block is located at the initial position, the main body and the abutment block are not interlaced with the terminal panel along the first direction. At this time, the main body and the abutment block can pass through the mounting hole along the first direction. When the abutment block is located at the intermediate position, the abutment block can also slide relative to the main body along the first direction and have a limiting position. When the abutment block is located at the limiting position, the abutment block and the module panel can respectively abut against both sides of the terminal panel along the first direction to clamp the terminal panel. When the abutment block is located at the limiting position, the locking member can lock the position of the abutment block relative to the main body, thereby stably installing the module housing on the terminal panel. In the module shell, the abutment block is first rotated relative to the main body and then slid into place to complete the installation. After the rotation, the abutment block can be only partially extended, which can reduce the space occupied. In addition, the extension of the abutment block and the movement close to the terminal panel are not performed synchronously. The abutment block is extended relative to the rotation of the main body. At this time, the change in the distance between the abutment block and the terminal panel is small. When the terminal panel is thicker, the abutment block can still be rotated to the middle position and then slide relative to the main body along the first direction, and then abut with the terminal panel. This can avoid the situation where the abutment block contacts the terminal panel before it is fully extended, thereby avoiding the situation where the abutment block and the module panel cannot stably clamp the terminal panel.

[0023] The utility model also provides a printer, including a printing module and the above-mentioned module housing, the module housing is used to be installed on the terminal panel, the printing module is arranged in the module housing, and is used to print on the print medium. In the module housing, when the abutment block is located at the initial position, the main body and the abutment block can pass through the mounting hole along the first direction, when the abutment block is located at the middle position, the abutment block can also slide relative to the main body and have a limit position, when the abutment block is located at the limit position, the abutment block and the module panel can respectively abut against both sides of the terminal panel along the first direction to clamp the terminal panel. In the module shell, the abutment block is first rotated relative to the main body and then slid into place to complete the installation. After the rotation, the abutment block can be only partially extended, which can reduce the space occupied. In addition, the extension of the abutment block and the movement close to the terminal panel are not performed synchronously. The abutment block is extended relative to the rotation of the main body. At this time, the change in the distance between the abutment block and the terminal panel is small. When the terminal panel is thicker, the abutment block can still be rotated to the middle position and then slide relative to the main body along the first direction, and then abut with the terminal panel. This can avoid the situation where the abutment block contacts the terminal panel before it is fully extended, thereby avoiding the situation where the abutment block and the module panel cannot stably clamp the terminal panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the module housing in the embodiment of the utility model. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the module housing in the embodiment of the utility model. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the module housing in the embodiment of the utility model. Figure 3 ;

[0027] Figure 4 This is a schematic diagram of the partial structure of the module housing in the embodiment of the utility model. Figure 1 ;

[0028] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0029] Figure 6 This is a schematic diagram of the partial structure of the module housing in the embodiment of the utility model. Figure 1 ;

[0030] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0031] Figure 8 This is a schematic diagram of the structure of the abutment block in the embodiment of the utility model. Figure 1 ;

[0032] Fig. 9 This is a schematic diagram of the structure of the abutment block in the embodiment of the utility model. Figure 2 ;

[0033] Fig.10 It is a cross-sectional view of the module housing in the embodiment of the utility model.

[0034] In the figure:

[0035] 1. Main body; 11. First slide groove; 12. Second slide groove; 13. Mounting groove; 14. Nut mounting groove;

[0036] 2. Module panel;

[0037] 3. abutment block; 31. rotating shaft; 32. slider; 33. through hole; 34. avoidance groove; 35. first groove; 36. second groove; 37. convex rib;

[0038] 4. Screws; 41. Nuts;

[0039] 5. Reset elastic member;

[0040] 6. Limit strip; 61. Limit block. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] In some instruments, it is necessary to install a micro printer on the terminal panel of the instrument. However, the existing technology has the following problems: on the one hand, after the slider base is installed in place, the slider is extended relative to the slider base as a whole, and the slider occupies a large space; on the other hand, during the sliding process of the slider relative to the slider base, the slider moves toward the front panel and extends out of the groove simultaneously. If the front panel is thick, the slider may abut against the front panel before it is fully extended from the groove, so that the slider and the panel cannot stably clamp the front panel of the instrument, which further leads to unstable installation of the printer housing.

[0046] In view of the above problems, this embodiment provides a module housing to solve the problem in the prior art that the slider occupies a large space and may cause the slider and the panel to be unable to stably clamp the front panel, and can be used in the field of printer technology.

[0047] Reference Figure 1-Figure 10 The module housing is used to be installed on the terminal panel, and the terminal panel has a mounting hole. The module housing includes a main body, a module panel, an abutment block and a locking member. The main body is used to be inserted into the mounting hole; the module panel 2 is fixedly arranged on the main body 1; the abutment block 3 can rotate relative to the main body 1 and has an initial position and an intermediate position. When the abutment block 3 is located at the initial position, the main body 1 and the abutment block 3 are not interlaced with the terminal panel along the first direction. At this time, the main body 1 and the abutment block 3 can pass through the mounting hole along the first direction. When the abutment block 3 is located at the intermediate position, the abutment block 3 can also slide relative to the main body 1 and have a limited position. When the abutment block 3 is located at the limited position, the abutment block 3 and the module panel 2 can respectively abut against both sides of the terminal panel along the first direction to clamp the terminal panel. When the abutment block 3 is located at the limited position, the locking member 4 can lock the position of the abutment block 3 relative to the main body 1, so that the module housing is stably installed on the terminal panel. In the module housing, the abutment block 3 is first rotated relative to the main body 1, and then slid into place to complete the installation. After the rotation, the abutment block 3 can be only partially extended, which can reduce the space occupied. At this time, the abutment block 3 located in the middle position has been staggered with the terminal panel along the first direction. Later, it is only necessary to slide the abutment block 3 until it is tightly against the terminal panel to complete the installation. In addition, the extension of the abutment block 3 and the movement close to the terminal panel are not performed synchronously. The abutment block 3 is extended relative to the rotation of the main body. At this time, the change in the distance between the abutment block 3 and the terminal panel is small. When the terminal panel is thicker, the abutment block 3 can still slide relative to the main body 1 along the first direction after rotating to the middle position, and then abut against the terminal panel, which can avoid the situation where the abutment block 3 has contacted the terminal panel before it is fully extended, thereby avoiding the situation where the abutment block 3 and the module panel 2 cannot stably clamp the terminal panel.

[0048] Continue to refer to Figure 1-Figure 10The main body 1 is provided with a first slide groove 11 extending along a first direction, the abutment block 3 is provided with a rotating shaft 31, and can rotate relative to the main body 1 through the rotating shaft 31, and the rotating shaft 31 is slidably set in the first slide groove 11. Such a setting can enable the abutment block 3 to limit the sliding direction of the abutment block 3 through the rotating shaft 31 when it is rotated to the middle position and slides relative to the main body 1 along the first direction, so that the abutment block 3 can slide stably relative to the main body 1.

[0049] Continue to refer to Figure 1-Figure 10 The main body 1 is also provided with a second slide groove 12 parallel to the first slide groove 11, that is, the second slide groove 12 also extends along the first direction, and the abutment block 3 is provided with a slider 32. When the abutment block 3 is located at the initial position, the slider 32 is located outside the second slide groove 12, and when the abutment block 3 is located at the middle position, the slider 32 is located inside the second slide groove 12, so that when the abutment block 3 moves from the middle position to the limit position, the movement process of the slider 32 is as follows: Fig.10 As shown, when the abutment block 3 is located in the middle position, the slider 32 is located outside the second slide groove 12, specifically, between the first slide groove 11 and the second slide groove 12, and then the abutment block 3 rotates along the rotating shaft 31 relative to the main body 1, and the slider 32 moves to the dotted line position in the figure. At this time, the first slide groove 11 and the second slide groove 12 can be matched with the rotating shaft 31 and the slider 32 to ensure that the abutment block 3 slides stably in the first direction.

[0050] Continue to refer to Figure 1-Figure 10 The abutment block 3 has a through hole 33, and the locking member 4 is a bolt passing through the through hole 33. The bolt is threadedly connected to the main body 1, and the head of the bolt abuts against the abutment block 3. The user can drive the abutment block 3 to move by screwing the bolt. In addition, since the installation angle of the bolt relative to the main body 1 is unchanged, and the abutment block 3 will rotate relative to the main body 1, there is a gap between the screw rod of the bolt and the hole wall of the through hole 33 to prevent the abutment block 3 from interfering with the bolt.

[0051] Optionally, the abutment block 3 has an avoidance groove 34 , and when the abutment block 3 is located between the middle position and the limit position, a portion of the screw rod of the bolt extends into the avoidance groove 34 to prevent the abutment block 3 from interfering with the bolt.

[0052] Optionally, the main body 1 is provided with a nut installation groove 14, a nut 41 is arranged inside the nut installation groove 14, the position of the nut 41 is fixed relative to the main body 1, and the bolt thread is passed through the nut 41. The abutment block 3 is located between the module panel 2 and the head of the bolt, and the head of the bolt and the abutment block 3 can abut along the first direction, so that the user can move the head of the bolt along the first direction by screwing the bolt, thereby driving the abutment block 3 to slide along the first direction.

[0053] Continue to refer to Figure 1-Figure 10The module housing further includes a reset elastic member 5, which is used to provide an elastic force to keep the abutment block 3 away from the module panel 2. When the module housing needs to be disassembled, the user can loosen the bolts, and the abutment block 3 is moved away from the module panel 2 and thus away from the terminal panel under the action of the reset elastic member 5 to complete the disassembly. The reset elastic member 5 is connected between the main body 1 and the abutment block 3. Specifically, the abutment block 3 has an inner cavity, and the reset elastic member 5 is connected between the main body 1 and the cavity wall of the inner cavity.

[0054] Continue to refer to Figure 1-Figure 10 The module shell also includes a limiting structure arranged on the main body 1, and the abutment block 3 is located between the module panel 2 and the limiting structure. When the abutment block 3 is located at the initial position, the abutment block 3 can abut against the limiting structure along the first direction, thereby preventing the abutment block 3 located at the initial position from falling off from the main body 1.

[0055] Continue to refer to Figure 1-Figure 10 The abutment block 3 has a first groove 35 and a second groove 36 arranged at intervals, and a convex rib 37 is provided between the first groove 35 and the second groove 36. The module housing also includes a limit bar 6 provided on the main body 1. When the abutment block 3 is located at the initial position, the limit bar 6 extends into the first groove 35, and at this time the first groove 35 extends along the first direction. When the abutment block 3 moves from the initial position to the middle position, the limit bar 6 can pass over the convex rib 37 and move into the second groove 36, and at this time the second groove 36 extends along the first direction. At least one of the convex rib 37 and the limit bar 6 is elastic. Such a setting enables the abutment block 3 to move to another position as quickly as possible when switching between the initial position and the middle position, and can prevent the abutment block 3 from moving excessively or failing to move to the right position.

[0056] Optionally, in this embodiment, the limiting structure is a limiting block 61 protruding from the main body 1, and when the abutting block 3 is located at the initial position, the abutting block 3 can abut against the limiting block 61 along the first direction. The limiting strip 6 is disposed on the limiting block 61, so that the limiting block 61 and the limiting strip 6 form a whole, so as to reduce the number of parts.

[0057] Continue to refer to Figure 1-Figure 10 The main body 1 has a mounting groove 13. When the abutment block 3 is located at the initial position, the abutment block 3 is located in the mounting groove 13. When the abutment block 3 is located at the limit position, part of the abutment block 3 extends out of the mounting groove 13, that is, part of the abutment block 3 protrudes relative to the surface of the main body 1. At this time, the protruding part can block the main body 1 and the abutment block 3 from passing through the mounting hole as a whole, so that the abutment block 3 can be tightly pressed against one side of the terminal panel.

[0058] The present embodiment also provides a printer, including a printing module and the above-mentioned module housing, the module housing being a printer housing, the module housing being used to be installed on a terminal panel, the printing module being arranged in the module housing, and being used to print on a medium to be printed. In the module housing, when the abutment block 3 is located at an initial position, the main body 1 and the abutment block 3 can pass through the mounting hole along a first direction, when the abutment block 3 is located at an intermediate position, the abutment block 3 can also slide relative to the main body 1 and have a limited position, when the abutment block 3 is located at a limited position, the abutment block 3 and the module panel 2 can respectively abut against both sides of the terminal panel along a first direction to clamp the terminal panel. In the module shell, the abutment block 3 is first rotated relative to the main body 1 and then slid into place to complete the installation. After the rotation, the abutment block 3 can be only partially extended, which can reduce the space occupied. In addition, the extension of the abutment block 3 and the movement close to the terminal panel are not performed synchronously. The abutment block 3 is extended relative to the rotation of the main body. At this time, the change in the distance between the abutment block 3 and the terminal panel is small. When the terminal panel is thicker, the abutment block 3 can still slide relative to the main body 1 after rotating to the middle position, and then abut with the terminal panel, which can avoid the situation where the abutment block 3 contacts the terminal panel before it is fully extended, thereby avoiding the situation where the abutment block 3 and the module panel 2 cannot stably clamp the terminal panel.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A module housing, used for installation on a terminal panel, wherein the terminal panel has a mounting hole extending along a first direction, characterized in that: The module housing comprises: A main body (1) is used to be inserted into the mounting hole; A module panel (2) is fixedly arranged on the main body (1); The abutment block (3) is rotatable relative to the main body (1) and has an initial position and an intermediate position. When the abutment block (3) is located at the initial position, the main body (1) and the abutment block (3) are not interlaced with the terminal panel along the first direction. When the abutment block (3) is located at the intermediate position, the abutment block (3) is also slidable relative to the main body (1) along the first direction and has a limit position. When the abutment block (3) is located at the limit position, the abutment block (3) and the module panel (2) can respectively abut against two sides of the terminal panel along the first direction. A locking member (4), when the abutment block (3) is located at a limiting position, the locking member (4) can lock the position of the abutment block (3) relative to the main body (1).

2. The module housing according to claim 1, characterized in that: The main body (1) is provided with a first sliding groove (11) extending along a first direction, and the abutment block (3) is provided with a rotating shaft (31) and can rotate relative to the main body (1) through the rotating shaft (31), and the rotating shaft (31) is slidably arranged in the first sliding groove (11).

3. The module housing according to claim 2, characterized in that: The main body (1) is also provided with a second slide groove (12) parallel to the first slide groove (11); the abutment block (3) is provided with a slider (32); when the abutment block (3) is located at an initial position, the slider (32) is located outside the second slide groove (12); when the abutment block (3) is located at an intermediate position, the slider (32) is located inside the second slide groove (12).

4. The module housing according to claim 1, characterized in that: The abutment block (3) has a through hole (33), the locking member (4) is a bolt passing through the through hole (33), the bolt is threadedly connected to the main body (1), and the head of the bolt abuts against the abutment block (3), and there is a gap between the screw rod of the bolt and the hole wall of the through hole (33).

5. The module housing according to claim 4, characterized in that: It also comprises a resetting elastic member (5), wherein the resetting elastic member (5) is used to provide an elastic force to move the abutting block (3) away from the module panel (2).

6. The module housing according to claim 4, characterized in that: The abutment block (3) has an avoidance groove (34), and when the abutment block (3) is located between the middle position and the limit position, a portion of the screw rod of the bolt extends into the avoidance groove (34).

7. The module housing according to claim 1, characterized in that: It also comprises a limiting structure arranged on the main body (1), the abutment block (3) being located between the module panel (2) and the limiting structure, and when the abutment block (3) is located at an initial position, the abutment block (3) can abut against the limiting structure along a first direction.

8. The module housing according to claim 1, characterized in that: The contact block (3) has a first groove (35) and a second groove (36) which are arranged at intervals, and a convex rib (37) is provided between the first groove (35) and the second groove (36). The module shell also includes a limiting strip (6) provided on the main body (1). When the contact block (3) is located at an initial position, the limiting strip (6) extends into the first groove (35), and at this time, the first groove (35) extends along a first direction. When the contact block (3) moves from the initial position to an intermediate position, the limiting strip (6) can pass over the convex rib (37) and move into the second groove (36), and at this time, the second groove (36) extends along the first direction. At least one of the convex rib (37) and the limiting strip (6) has elasticity.

9. The module housing according to claim 1, characterized in that: The main body (1) has a mounting groove (13); when the abutment block (3) is located at an initial position, the abutment block (3) is located in the mounting groove (13); when the abutment block (3) is located at a limiting position, part of the abutment block (3) extends out of the mounting groove (13).

10. A printer, characterized in that It comprises a printing module and a module housing as described in any one of claims 1 to 9, wherein the module housing is used to be installed on a terminal panel, and the printing module is arranged in the module housing and is used to print on a print medium.

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