Paper roll module of label printing device and label printing device

Abstract

This invention discloses a paper roll module for a label printing device and the label printing device itself. The paper roll module of the label printing device includes: a fixed shaft, a positioning member, a rotating housing, a friction assembly, and an operating assembly. The positioning member and the rotating member are disposed at one end of the fixed shaft. The rotating housing is rotatable relative to the fixed shaft. The friction assembly includes a connecting member and a friction member; the connecting member rotates with the rotating housing relative to the fixed shaft, and the friction member is fixed to the fixed shaft. The operating assembly includes a rotating member and an elastic member. The rotating member is rotatable relative to the fixed shaft. The rotating member has multiple engaging structures. The two ends of the elastic member abut against the friction assembly and the rotating member, respectively. When the positioning member engages with different engaging structures, the degree of elastic deformation of the elastic member varies, and the force provided by the friction member to the connecting member corresponds to different degrees.

Claims

1. A paper roll module for a label printing apparatus, for mounting in a label printing apparatus, the paper roll module for providing a paper roll arrangement; the paper roll module of the label printing apparatus comprises: a fixed shaft, one end of which is fixed to a body of the label printing apparatus, the other end of which is a free end; a positioning member disposed at the free end of the fixed shaft; a rotating housing, which is sleeved on the fixed shaft via at least one pivot member, the rotating housing being rotatable relative to the fixed shaft; a friction assembly, comprising at least one connecting member and at least one friction member, the connecting member being connected to the rotating housing, the connecting member being rotatable with the rotating housing relative to the fixed shaft, the friction member being fixed to the fixed shaft; an operating assembly, comprising: a rotating member disposed at the free end of the fixed shaft, the rotating member being rotatable relative to the fixed shaft; one side of the rotating member having a plurality of engaging structures; an elastic member, the two ends of which respectively abut against the friction assembly and the rotating member; wherein... When the positioning component engages with different engaging structures, the distance between the rotating component and the end of the rotating housing is different, and the force provided by the friction component to the connecting component is also different.

2. The paper roll module of the label printing apparatus as described in claim 1, wherein, Each of the aforementioned engaging structures consists of multiple engaging grooves formed by the recess of the rotating component, and the depths of the multiple engaging grooves are different.

3. The paper roll module of the label printing apparatus as described in claim 2, wherein, One end of the rotating component has two stepped structures, each of which includes multiple stepped sections. A retaining wall is formed at the junction of each stepped section. Each stepped section and two adjacent retaining walls together form a locking groove. When the positioning component and the rotating component are engaged, both ends of the positioning component are engaged with the same stepped sections of the two stepped structures.

4. The paper roll module of the label printing apparatus as described in claim 3, wherein, The fixed shaft includes a rotating section and a fixed section. The rotating section is provided with multiple pivot members. The rotating section of the fixed shaft has a cylindrical structure, while the fixed section of the fixed shaft has a non-cylindrical structure. The friction element is disposed in the fixed section, but the friction element cannot rotate relative to the fixed shaft. The friction assembly includes multiple connecting members and multiple friction elements. At least one friction element is disposed on both sides of each connecting member. A stop portion is formed at the connection position between the rotating section and the fixed section. The elastic element and the stop portion together restrict the range of motion of the friction assembly in the fixed section.

5. The paper roll module of the label printing apparatus as described in claim 1, wherein, The inner side of the rotating housing has a plurality of connecting grooves, and the connector has a plurality of connecting protrusions, the plurality of connecting protrusions of the connector being able to be engaged in the plurality of connecting grooves; the connector has a central through hole, and the connector passes through the central through hole to the fixed shaft.

6. A label printing apparatus, comprising: a body; a printing module disposed on the body, the printing module being used to print label paper from a paper roll; a paper roll module being used to provide the paper roll; the paper roll module comprising: a fixed shaft, one end of which is fixed to the body, and the other end of which is a free end; a positioning member disposed on the free end of the fixed shaft; a rotating housing sleeved on the fixed shaft via at least one pivot member, the rotating housing being rotatable relative to the fixed shaft; a friction assembly comprising at least one connecting member and at least one friction member, the connecting member being connected to the rotating housing, the connecting member being rotatable with the rotating housing relative to the fixed shaft, and the friction member being fixed to the fixed shaft; an operating assembly comprising: a rotating member disposed on the free end of the fixed shaft, the rotating member being rotatable relative to the fixed shaft; and a plurality of engaging structures on one side of the rotating member. An elastic element, the two ends of which abut against the friction assembly and the rotating element respectively; wherein, When the positioning component engages with different engaging structures, the distance between the rotating component and the end of the rotating housing is different, and the force provided by the friction component to the connecting component is also different.

7. The label printing apparatus as claimed in claim 6, wherein, Each of the aforementioned engaging structures consists of multiple engaging grooves formed by the recess of the rotating component, and the depths of the multiple engaging grooves are different.

8. The label printing apparatus as claimed in claim 7, wherein, One end of the rotating component has two stepped structures, each of which includes multiple stepped sections. A retaining wall is formed at the junction of each stepped section. Each stepped section and two adjacent retaining walls together form a locking groove. When the positioning component and the rotating component are engaged, both ends of the positioning component are engaged with the same stepped sections of the two stepped structures.

9. The label printing apparatus as claimed in claim 8, wherein, The fixed shaft includes a rotating section and a fixed section. The rotating section is provided with multiple pivot members. The rotating section of the fixed shaft has a cylindrical structure, while the fixed section of the fixed shaft has a non-cylindrical structure. The friction element is disposed in the fixed section, but the friction element cannot rotate relative to the fixed shaft. The friction assembly includes multiple connecting members and multiple friction elements. At least one friction element is disposed on both sides of each connecting member. A stop portion is formed at the connection position between the rotating section and the fixed section. The elastic element and the stop portion together restrict the range of motion of the friction assembly in the fixed section.

10. The label printing apparatus as claimed in claim 6, wherein, The inner side of the rotating housing has a plurality of connecting grooves, and the connector has a plurality of connecting protrusions, the plurality of connecting protrusions of the connector being able to be engaged in the plurality of connecting grooves; the connector has a central through hole, and the connector passes through the central through hole to the fixed shaft.

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