JPH0343012Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a thermal recording head device, and more specifically, a recording head installed on a head mount base is pressed against a platen roller by the biasing force of a leaf spring. The present invention relates to a thermal recording head device as described above.

[Technical background of the invention] FIGS. 1 and 2 respectively show a conventional general thermal recording head device.

In the thermal recording head device shown in FIG. 1, a head mount base 1 on which a recording head 1a is installed is rotatably supported by supports 3, 3 on the main body side of the device by a support shaft 2, and the biasing force of coil springs 4, 4 is supported. The recording head 1a is pressed against the platen roller 5 by the recording head 1a. In the thermal recording head device shown in FIG. 2, a head mount base 1 is rotatably supported by a frame 7 on the device main body side via plate springs 6, and the head 1a is supported by the biasing force of the plate spring 6. It has a configuration in which it is pressed by the platen roller 5. In addition, in Figures 1 and 2, 8
is a recording paper which is interposed between the head 1a and the platen roller 5 and is thermally recorded.

[Problems with the Background Art] In these conventional thermal recording head devices, each part is individually assembled at the installation location of the device body, so the assembly work is complicated.

[Object of the invention] An object of the invention is to provide a thermal recording head device that can streamline the assembly work process.

[Summary of the invention] In order to achieve the above object, the present invention provides a structure in which the head mount base is biased between the head mount base on which the recording head is fixedly mounted, and the head base that holds the head mount base. Insert a leaf spring having a tongue piece erected thereon which regulates the range of movement of the head mount base, the tongue piece erected on this leaf spring, the tongue piece erected on the head base, or any one of these tongue pieces. The range of movement of the head mount base is restricted by claws formed at the tips of the opposing tongues, and the head mount base, leaf spring, and head base are integrated into a unit.

[Embodiments of the invention] Hereinafter, a thermal recording head device according to the invention will be described in detail with reference to the accompanying drawings.

3 and 4 show an embodiment of a thermal recording head device according to the present invention.

This thermal recording head device has support shafts 10a, 10a on both sides of one end, and a recording head 10b on the other end.
A head mount base 10 equipped with a head mount base 10 is installed on the head base 11 via a leaf spring 12 whose one end is fixed to the head base 11. The head mount base 10 and leaf spring 12 are installed on the head base 11 in the following manner.

That is, the head mount base 10 is inserted from the front side to the back side of the head base 11 shown in FIG. 10 and the head base 11, also on the front side of the head base 11, that is, the recording head 10.
The back side from the first edge side, which is the edge along the longitudinal direction b and corresponding to the side having the support shaft 10a of the head mount base 10, that is, the side on which the recording head 10b of the head mount base 10 is fixedly installed. Insert the leaf spring 12 toward the head base 11.
Fix it on top. Here, one end of the leaf spring 12 is extended to form a tongue piece 15, which restricts the range of movement of the head mount base 10. A protrusion 13 is provided at one end of the head base 11 and the other end of the leaf spring 12.
a, 13b are formed. These projections 13
The tips of a and 13b are connected to the head mount base 10.
is brought into contact with the left-right symmetry axis 10d of the lower surface 10c of the
As a result, the head 10 is moved to the platen roller 14.
When the head 10b is brought into contact with the head 10b, the contact pressure in the longitudinal direction of the head 10b is made uniform. Furthermore, in this heat-sensitive recording head device, out of the four edges of the head base 11, a tongue piece 16, which is a second tongue piece, is attached to each of three edges, excluding the first edge where the leaf spring 12 is inserted. , tongue piece 17 which is the third tongue piece,
A tongue piece 18, which is a fourth tongue piece, is provided upright. These tongues 15, 15, 16, 17, 17, and 18 restrict the range of movement of the head mount base 10 in the front, rear, and left directions. Further, in this heat-sensitive recording head device, the tongue pieces 15 and 1 which are opposite tongue pieces are
Bend the tips of 5, 17, 17 inward and attach the claw 15.
a, 15a, 17a, and 17a are formed. The head mount base 10 is formed by these claws 15a, 15a, 17a, 17a and the head base 10.
The vertical movement range of is regulated. Therefore, the head mount base 10 is held on the head base 11 so that it cannot fall off, and is urged upward by the urging force of the leaf spring 12, so that the head mount base 10, the head base 11, and the plate are urged upwardly. The spring 12 is formed into a unit (hereinafter referred to as a unit 19). In addition, Figures 3 and 4
In the figure, 20 is a recording paper.

Next, the operation of this embodiment will be explained, and the configuration of this embodiment will be further clarified.

In the thermal recording head device according to this embodiment, bolts (not shown) are inserted into the bolt insertion holes 11a, 11a, 11a, 11a formed in tongue pieces extending at the four corners of the head base 11, and these bolts are inserted into the device body (not shown). The unit 19 is assembled into the main body of the apparatus by fastening the heat-sensitive recording head apparatus. At this time, as shown in FIG.
As a result, a row of heating elements (not shown) of the head 10b is aligned with a contact point 14a of the platen roller 14 with the head 10b. Figure 6 shows
The long groove 21 is made into an arc shape centered on the contact point 14a, and when the unit 19 is installed in the main body of the device, no matter where the support shaft 10a is located in the long groove 21,
This is an example in which the head 10b can be reliably positioned with respect to the platen roller 14.

[Effects of the invention] As explained above, the thermal recording head device according to the invention has a head mount base between the head mount base on which the recording head is fixedly mounted and the head base that holds the head mount base. Insert a leaf spring with an upright tongue piece that biases the head mount base and restricts the range of movement of the head mount base.
The moving range of the head mount base is controlled by the tongue piece erected on the leaf spring, the tongue piece erected on the head base, and the claw formed at the tip of one of these tongue pieces facing each other. Since the head mount base, leaf spring, and head base are made into a unit, the assembly work can be divided, thereby streamlining the assembly work process.

[Brief explanation of the drawing]

1 and 2 are perspective views schematically showing an example of a conventional thermal recording head device, and FIGS.
The drawings show an embodiment of the heat-sensitive recording head according to the present invention; FIG. 3 is a perspective view thereof, FIG. 4 is a sectional view taken along the left-right symmetry axis 10d of the head mount base 10, and FIG. The figure is a perspective view partially showing how the support shaft 10a of the head mount base 10 is fitted into the long groove 21 of the main body of the apparatus, and FIG. 6 is a sectional view schematically showing another example of the long groove 21. 10... Head mount base, 10b... Recording head, 11... Head base, 12... Leaf spring, 15, 15, 16, 17, 17, 18... Tongue piece, 15a, 15a, 17a, 17a... Claw ,1
9...Unit.

Claims (1)

[Claims for Utility Model Registration] A head mount base having support shafts on both sides of one end and a recording head fixed to a first surface of the other end; and the first surface of this head mount base. A head base that is located on the opposite second surface side and is to hold this head mount base; and A head base that is located along the longitudinal direction of the recording head among the four edges of this head base and that supports the support axis of the head mount base. A second tongue piece, a third tongue piece and a fourth tongue piece inserted between the head base and the head mount base from the first edge side, fixed to the head base, and biasing the recording head to press against the opposing platen roller; and a leaf spring having a first tongue piece erected to restrict movement of the head mount base toward the first edge side, and one of the first to fourth tongue pieces facing the head mount base. 1. A thermal recording head device comprising a claw formed at the tip of a tongue piece for regulating the range of movement of the head mount base together with the head base.