JPH0512058Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to a printer in which a print head facing the platen is supported on the upper surface of a carriage movable along the platen, and in particular, the invention relates to a printer that supports a print head facing the platen. This relates to a mounting configuration for a carriage.

(Prior Art) In conventional printers of this type, the print head was attached to the top surface of the carriage at its bottom by screws or the like.

(Problems to be Solved by the Invention) However, with this mounting configuration, not only is it troublesome to attach and detach the print head to and from the carriage, but also only the lower portion of the print head comes into contact with the carriage. There was a problem in that the heat dissipation efficiency in the upper part of the print head deteriorated.

Structure of the invention (means for solving the problem) This invention was made to solve the above-mentioned problem, and the solution is a metal band plate that contacts the upper outer peripheral surface of the print head 3. A mounting member 25 made of a material, and a latching portion 26 that is latched onto a support portion 33 of the carriage 4 provided at one end of the mounting member 25 to support the mounting member 25 so as to be movable toward and away from the print head 3. , the mounting member 25 is attached to the print head 3
an elastically deformable holding member that is provided with a contact portion 29 that makes surface contact with the outer surface of the carriage 4 in a state in which it is in contact with the surface of the carriage 4; It consists of 37.

(Operation) In the print head mounting device of this invention, the print head 3 is placed on the upper surface of the carriage 4, and the mounting member 2 is attached to the support portion 33 of the carriage 4.
The print head 3 can be attached to the carriage 4 by a simple operation of engaging the hook portion 26 of the mounting member 25 with the upper surface of the print head 3, bringing the contact portion 29 of the mounting member 25 into contact with the outer surface of the carriage 4, and holding the contact state between the contact portion 29 and the carriage 4 by the holding member 37.
In this mounted state, the abutting portion 29 and the carriage 4 are in surface contact with each other, and the holding member 3
Since the abutment portion 29 is biased in the surface contact direction by the biasing member 7, the mounting member 25 and the carriage 4 can be kept in sufficient contact with each other, and the mounting member 25 can effectively transmit the heat of the print head 3 to the carriage 4, thereby improving the heat dissipation efficiency of the entire print head 3.

(Example) Hereinafter, an example that embodies this invention will be described based on the drawings.

As shown in FIG. 1, a platen 1 is rotatably supported in the outer box (not shown) of the printer, and in front of the platen 1 (to the left in FIG. 1) is a platen 1 extending parallel to the platen 1. An extending guide shaft 2 is provided. This guide shaft 2 has a platen 1
A carriage 4 supporting the print head 3 facing the
is slidably supported in the insertion hole 5 at the rear (right side in FIG. 1). The front end of the carriage 4 is guided in movement by a rail 7 attached to the front surface of the bottom box inner frame 6.

The carriage 4 of this embodiment includes a sliding member 9 made of synthetic resin in which the insertion hole 5 is formed, and a head support member 8 made of aluminum that supports the print head 3.
Both 8 and 9 are integrally assembled with a screw 10 and a concave-convex connecting portion 11. A plurality of cooling fins 12 are provided protruding from both outer surfaces of the head support body 8 . A paper presser 13 and a ribbon guide 14 are integrally formed on the upper end surface of the sliding body 9. In addition, in FIG. 1, 15 is the platen 1.
This is a paper guide portion integrally formed with the internal frame 6 so as to extend opposite to the lower surface of the inner frame 6.

Next, the mounting structure of the print head 3 to the head support member 8 of the carriage 4 will be explained in detail.

As shown in FIG. 2, a housing recess 17 is formed in the head support body 8, and a stepped portion 18 is formed on the bottom surface of the housing recess 17.
is provided. The lower half of the print head 3 is accommodated in the accommodation recess 17 of the head support body 8;
The leg portion 19 provided on the lower surface of the print head 3 is supported in contact with the step portion 18, and is prevented from moving in the left-right direction. Further, as shown in FIG. 1, a nose portion 21 that projects toward the platen 1 is provided on the rear surface of the printing head 3, and the sliding portion 9 is provided on the lower surface of the nose portion 21.
A notch 22 is formed to fit into a projection 23 integrally formed on the upper end surface. The fit between the notch 22 and the protrusion 23 prevents the printing head 3 from moving forward and backward relative to the head support body 8.

As shown in FIGS. 1, 2 and 3, a mounting member 25 is disposed on the upper surface of the print head 3 for mounting the print head 3 to the head support body 8 so as not to be able to move upwardly. This mounting member 25 is made of a metal strip material with good heat transfer effect, such as aluminum,
It is formed in an arch shape so that it can come into contact with the upper outer surface of the print head 3. As shown in FIGS. 2 and 3, a front-shaped latching portion 26 is bent at one end of the mounting member 25, and its hanging portion is slightly inclined forward, and there is a A narrow portion 27 and a wide portion 28 are provided above and below.Also, as shown in FIG.
A letter-shaped contact portion 29 is formed by bending, and a fitting hole 30 is cut out in the end face thereof.

On the other hand, as shown in FIG. 3, a groove 32 is formed on the outer surface of the head support body 8 corresponding to the hooking portion 26 of the mounting member 25 so as to extend vertically. A pair of supporting portions 33 are protruded from the inner surface of the upper end of the groove 32 and are opposed to each other with an interval such that the narrow portion 27 of the hooking portion 26 can fit therein. By fitting the narrow part 27 of the hooking part 26 between both the supporting parts 33, the mounting member 2 is attached to the head supporting part body 8.
5 is removably supported, and when the mounting member 25 is rotated toward the printing head 3 around the supporting part, the entire lower surface of the mounting member 25 comes into contact with the upper outer surface of the printing head 3. Note that when the mounting member 25 is in contact with the printing head 3, the lower surface of the contact portion 29 of the mounting member 25 is on the other side upper surface of the head support body 8, and the holding member 3 (described later)
Elastic contact is made by the action of 7.

As shown in FIGS. 1 and 2, a groove 35 extending vertically is carved on the other side of the head support body 8.
A pair of opposing shaft portions 36 are provided on the inner surface of the intermediate portion of 5.
is installed protrudingly. These shaft portions 36 engage with the abutting portion 29 to attach the mounting member 25 to the print head 3.
holding member 37 for holding in a contact position with respect to
is installed.

The holding member 37 has a small hole 3 that fits into the shaft portion 36.
a pair of leg pieces 41 having a diameter of 9, an operating part 42 extending upward from the leg pieces 41 in an inverted "shape," and an operating part 43 standing upward from the tip of the operating part 42.
It is integrally constructed with a metal leaf spring. A pressing protrusion 45 that can be engaged with a recess 44 provided on the upper surface of the contact portion 29 of the mounting member 25 is provided at the connection portion between the action portion 42 and the operation portion 43 . When the holding member 37 is rotated from the chain line position to the solid line position shown in FIG. The lower surface of the part 29 is pressed against the upper surface of the head support body 8, and the mounting member 2
The entire lower surface of the print head 5 is pressed against the upper outer surface of the print head 3, and in this state, the print head 3 is assembled and held immovably to the head support body 8. In addition,
A pin 46 that fits into the fitting hole 30 of the contact portion 29 is protruded from the upper surface of the head support body 8. When the pin 46 and the fitting hole 30 fit together, the mounting member 25
The position in the front-rear direction on the side of the contact portion 29 can be determined.

Therefore, in the print head mounting device having the above-described configuration, first, the narrow portion 27 of the hooking portion 26 is fitted between the support portions 33 of the head support body 8, and the attachment member is attached to the head support body 8. 25 is hooked, and then the mounting member 25 is turned toward the print head 3 side so that both are brought into contact with each other, and then the head support body 8 and the contact portion 29 are kept in pressure contact with each other by the holding member 37. Then, the print head 3 can be easily assembled and held on the carriage 4. In this assembled state of the print head 3, the heat in the lower part of the print head 3 is transferred to the carriage 4 side through contact between the leg portion 19 of the print head 3 and the stepped portion 18 of the head support body 8. As well as being conducted, heat from the upper portion of the print head 3 is transferred to the carriage 4 through contact between the upper outer surface of the print head 3 and the mounting member 25.
conducted to the side. Therefore, unlike the conventional printing head, the heat of the printing head 3 is efficiently dissipated in its upper and lower parts. Moreover, the mounting member 25 of this embodiment
Since the head can be attached to and detached from the head support body 8 at the hook portion 26, the structure and assembly are simpler than when the head is rotatably supported.

Note that this invention is not limited to the configuration of the above-mentioned embodiments, and the configuration of each part may be modified without departing from the spirit of this invention, such as changing the shape of the mounting member 25 as appropriate depending on the shape of the printing head 3. It is also possible to change and embody it as desired.

Effects of the invention As detailed above, according to this invention, the hooking part of the mounting member is latched to the support part of the carriage, and the abutting part of the mounting member is brought into contact with the carriage by the holding member. The printing head can be mounted on the carriage by simply holding it, making it easy to install the printing head.In addition, in the mounted state, the abutment part and the carriage are in surface contact, and the Since the contact portion is configured to be biased in the direction of surface contact, the mounting member and the carriage can maintain sufficient contact, and the mounting member can effectively conduct heat from the print head to the carriage. As a result, the heat dissipation efficiency of the entire print head can be improved.Furthermore, since the holding member can be elastically deformed, the mounting member does not need to have high elasticity, so it is possible to use a wide or thick mounting member. It has the excellent effect of providing high thermal conductivity.

[Brief explanation of the drawing]

FIG. 1 is a partial side sectional view of a printer showing an embodiment of this invention, and FIG.
3 is a partial side view of the carriage viewed from a direction different from that shown in FIG. 1. In the figure, 1 is the platen, 3 is the print head, and 4 is the print head.
is a carriage, 25 is a mounting member, 26 is a hook part,
29 is a contact portion, 33 is a support portion, and 37 is a holding member.

Claims (1)

[Claims for Utility Model Registration] 1. Carriage 4 movable along platen 1
Print head 3 facing platen 1 is placed on the top surface of the printer.
A mounting member 25 made of a metal strip material is disposed on the upper outer peripheral surface of the print head 3, and the mounting member 25 is attached to the carriage 4 at a hook portion 26 at one end thereof. The mounting member 25 is hooked to the support portion 33 to support the mounting member 25 so as to be movable toward and away from the print head 3, and the carriage 4 is attached to the other end of the mounting member 25 while the mounting member 25 is in contact with the print head 3. A contact portion 29 is provided which makes surface contact with the outer surface of the
A print head mounting device characterized in that an elastically deformable holding member 37 is provided which urges the print head in the direction of surface contact and holds the print head in the contact position. 2. The print head mounting device for a printer according to claim 1, wherein the mounting member 25 is removably supported to the support portion 33 of the carriage 4 by the hook portion 26. 3. The print head mounting device for a printer according to claim 1, wherein the holding member 37 is constituted by a leaf spring rotatably supported on the carriage 4.