CN-224232564-U - Key assembly structure and printer

CN224232564UCN 224232564 UCN224232564 UCN 224232564UCN-224232564-U

Abstract

The utility model provides a key assembly structure and a printer, which comprises a shell and a key body, wherein the shell is provided with a hole site for installing a key, the key body is arranged in the hole site, a buckling part is arranged at the position adjacent to the hole site on the back surface of the shell, a first elastic arm is connected to the outer wall of the key body protruding out of the back surface of the shell, and the first elastic arm is clamped into the buckling part so as to install and assemble the key body in the hole site. The buckling part is designed at the adjacent position of the hole site at the back of the shell, the outer wall of the key body is connected with the first elastic arm to be clamped into the buckling part, the structure does not need to rely on accurate positioning holes to be matched with a column like the prior art, the key body is limited and fixed on one side only after being assembled, the position of the key body is convenient to be finely adjusted in the assembly or use process, the installation requirements under different conditions are met or necessary calibration is carried out, the small fluctuation of the size in the injection molding process has better adaptability, and the problem that the size of a fit clearance between the key body and the shell is different due to unstable injection molding size is not easy to occur.

Inventors

DAI HUAJUN
YE HUIMING
JIANG JIAFENG

Assignees

厦门爱印科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (8)

1. The utility model provides a button assembly structure, includes casing and button body, be equipped with the hole site of installation button on the casing, the button body is located in the hole site, its characterized in that: the back of the shell is provided with a buckling part adjacent to the hole site, the key body protrudes out of the outer wall of the back of the shell and is connected with a first elastic arm, and the first elastic arm is clamped into the buckling part so as to install and assemble the key body in the hole site.
2. The key assembly structure according to claim 1, wherein the fastening portion is a fastening groove, a fastening block is disposed at a position adjacent to the hole on the back of the housing, the fastening block and the back of the housing enclose the fastening groove in a C shape, and the first elastic arm is fastened into the fastening groove.
3. The key assembly structure of claim 2, wherein the opening of the clamping groove faces the hole site.
4. The key assembly structure of claim 2, wherein the clamping block is provided with a reinforcing rib at an included angle between the surface of the key body facing away from the key body and the back surface of the shell.
5. The key assembly structure of claim 2, wherein the clamping block is L-shaped, and a relief groove is formed in the back surface of the housing opposite to the L-shaped transverse portion of the clamping block.
6. The key assembly structure according to claim 5, wherein one of the clamping blocks is arranged, the center line of the clamping block coincides with the center line of the hole site, or two of the clamping blocks are arranged on the same side of the hole site, and the two clamping blocks are symmetrically arranged along the center line of the hole site.
7. The key assembly structure of claim 1, wherein the first elastic arm is C-shaped, and the key body is connected to an open end of the C-shape of the first elastic arm.
8. A printer provided with a key assembly structure according to any one of claims 1 to 7.

Description

Key assembly structure and printer Technical Field The utility model relates to the technical field of printing equipment, in particular to a key assembly structure and a printer. Background The key assembly mode of the existing printer is generally provided with two posts on a printer shell for positioning, the keys are provided with positioning holes with phases, the posts penetrate into the positioning holes, the mode has very strict requirements on the size of the two positioning holes, the problem that the size edges of the fit gaps between the keys and the upper cover are easy to exist when injection molding is not controlled, the appearance is affected, and if one of the positioning holes or one of the posts deflects, the posts are difficult to penetrate into the positioning holes during assembly, even the situation that the posts cannot be installed in place occurs, as shown in patent literature with publication number CN 213973287U. Disclosure of utility model In order to solve the above problems, an object of the present utility model is to provide a key assembly structure and a printer. The key assembly structure comprises a shell and a key body, wherein a hole site for installing a key is formed in the shell, the key body is arranged in the hole site, a buckling part is arranged at a position, adjacent to the hole site, of the back surface of the shell, a first elastic arm is connected to the outer wall, protruding out of the back surface of the shell, of the key body, and the first elastic arm is clamped into the buckling part to install and assemble the key body in the hole site. Preferably, the fastening portion is a fastening groove, a fastening block is arranged at a position adjacent to the hole on the back of the shell, the fastening block and the back of the shell enclose a C-shaped fastening groove together, and the first elastic arm is fastened into the fastening groove. Preferably, the opening of the clamping groove faces the hole site. Preferably, the clamping block is provided with a reinforcing rib at an included angle between the surface of the key body and the back of the shell. Preferably, the clamping block is L-shaped, and a yielding groove is formed in the back surface of the shell, opposite to the L-shaped transverse part of the clamping block. Preferably, one clamping block is arranged, the center line of the clamping block is overlapped with the center line of the hole site, or two clamping blocks are arranged on the same side of the hole site and symmetrically arranged along the center line of the hole site. Preferably, the first elastic arm is C-shaped, and the key body is connected to the C-shaped opening end of the first elastic arm. A printer is provided with a key assembly structure as described above. Compared with the prior art, the key assembly structure and the printer have the advantages that 1. The buckling part is designed at the position adjacent to the hole site on the back of the shell, the outer wall of the key body is connected with the first elastic arm to be clamped into the buckling part, the structure does not need to rely on accurate positioning holes to be matched with columns like the prior art, the key body is limited and fixed only on one side after being assembled, the stable connection between the key body and the shell is realized, the adjustability of the key body is reserved to a certain extent, the position of the key body is convenient to be finely adjusted in the assembly or use process, the installation requirement under different conditions or necessary calibration is met, the problem that the size of a fit gap between the key body and the shell is different due to unstable injection molding size is not easy to occur, and accordingly the assembly quality and the appearance consistency of products are improved. 2. The buckling part is limited to be a C-shaped clamping groove surrounded by the back of the shell and the clamping blocks, the clamping blocks are arranged at the positions adjacent to the hole sites on the back of the shell, a certain elastic deformation space is reserved at the opening of the C-shaped clamping groove, when the first elastic arm is clamped, the clamping blocks on the two sides of the clamping blocks and the back of the shell form stable clamping on the first elastic arm, the key body is firmly assembled in the hole sites and is not easy to loosen, compared with the assembly mode of the prior art, the assembly mode of the column and the positioning hole is better in stability under the influence of external force and other factors in the long-term use process, the phenomena of loosening, falling-off and the like of the key can be effectively avoided, the reliability of key operation is ensured, and meanwhile, the installation and the disassembly of the first elastic arm are also convenient for the operation of maintaining and replacing parts and the like of products. 3. The clamping groove opening faces to