JP2574362Y2 - Thermal head holding mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal head holding mechanism, and more particularly to a thermal head holding mechanism used for a recorder of medical equipment such as an electrocardiograph.

[0002]

2. Description of the Related Art Conventionally, in a recorder of a medical device such as an electrocardiograph, a thermal head has been used as a means for printing predetermined information such as an electrocardiogram derived from a living body of a patient on recording paper. And, while keeping this thermal head in a predetermined position, meandering and offset of the recording paper are prevented,
In addition, a thermal head holding mechanism having a specific structure is employed so that clear printing can be performed by applying an appropriate pressure to the thermal head and the inclination of the platen roll can be coped with. Further, a large number of heating elements are arranged in the printing portion of the thermal head. However, the heating elements are cut or carbon adheres, and the printing state deteriorates. In this case, it is necessary to remove the entire thermal head holding mechanism, replace the thermal head with a broken heating element with a new one, or remove the attached carbon, and then attach the thermal head holding mechanism to the original position again. . Conventionally, the thermal head holding mechanism having such a function has a structure shown in FIG. In the prior art shown in FIG. 4, an iron plate 10 to which a thermal head 100 is attached is mounted.
1 is fixed with screws 401 and 402, and a predetermined pressure is applied from above the iron plate 101 by coil springs 303 and 304. When the recorder is operated by pressing the thermal head 100 against the platen roll 200 by such a thermal head holding mechanism, the recording paper 500 printed by the thermal head 100 is transported outward from between the both flanges 201 and 202. Go being.

[0003]

In the above-mentioned prior art, the adjustment of the thermal head 100 in the left-right direction is performed by the screw 4.
01 and 402, the adjustment of the parallel position of the thermal head 100 to the platen roll 200
302, respectively. In addition, the recording paper 500 goes straight without meandering by the flanges 201 and 202 provided on the recorder side. However, in this prior art, the plate 1 on which the thermal head 100 is
01, screws 401 and 402 for left and right adjustment and its mounting plate 400 are provided with screws 301 and 302 for parallel adjustment and its mounting plate 300 and coil springs 303 and 304 for pressing.
Furthermore, collars 201 and 202 were required. For this reason,
The number of components constituting the thermal head holding mechanism is extremely large, and the configuration is complicated. Also, due to the large number of parts, a tool is always required for removing and attaching the screw 401 and the like. Therefore, the time required for attaching and detaching the thermal head holding mechanism is long. The purpose of this invention is
An object of the present invention is to provide a thermal head holding mechanism that simplifies the configuration by using one component, and shortens the time required for attaching and detaching by eliminating the need for tools for attaching and detaching operations.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to form a mounting plate 1 having a thermal head 3 mounted on a front portion thereof by a single resilient member and to form flanges 1C, 1D located at both ends of the thermal head 3. Are formed integrally with the mounting plate 1,
The rear part of the mounting plate 1 is provided with openings 1A1, 1B1 and projections 2.
A, 2B, and the fixing plate 1 is fixed to the main body 21 of the recorder 2 by the insertion connection, and the mounting plate 1
By pressing the central part of the thermal head 3
Is pressed against the platen roll 5 to solve the problem.

[0005]

As described above, according to the present invention, the mounting plate 1 on which the thermal head 3 is mounted at its front portion is formed by one resilient member, and the flanges 1C located at both ends of the thermal head 3 are provided. 1D is formed integrally with the mounting plate 1, and the rear part of the mounting plate 1 is formed with openings 1A1, 1B1 and projections 2A,
2B, the thermal head 3 is pressed against the platen roll 5 by fixing to the main body 21 of the recorder 2 and pressing the center portion of the mounting plate 1 with the fitting point as a fulcrum. A thermal head holding mechanism is provided. According to the above configuration, since the entire thermal head mounting plate 1 is formed by one resilient member, for example, a leaf spring, there is no need for conventional adjusting screws, coil springs and related parts. . Further, the flanges 1C and 1D for the straight advance of the recording paper are also formed integrally with the mounting plate 1. Therefore, the thermal head holding mechanism is extremely simplified by having one component. Further, since the thermal head mounting plate 1 is composed of one resilient member, the fixing means for fixing to the recorder is not a screw as in the related art, but a fitting connection of a projection and an opening is used. Therefore, no tools are required for the attaching / detaching operation, and the attaching / detaching time is shortened.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; FIG. 1 is an overall view of an embodiment of the present invention. According to the present invention, the mounting plate 1 on which the thermal head 3 is mounted is formed by one resilient member, and the flanges 1C, 1D located at both ends of the thermal head 3 are provided. Is formed integrally with the mounting plate 1, and the rear portion of the mounting plate 1 is fitted into the main body 21 of the recorder 2 by fitting the openings 1 </ b> A <b> 1 and 1 </ b> B <b> 1 with the projections 2 </ b> A and 2 </ b> B.
And the thermal head 3 is pressed against the platen roll 5 by pressing the central portion of the mounting plate 1 with the fitting point as a fulcrum. is there.

In FIG. 1, reference numeral 1 denotes a mounting plate, 2 denotes a recorder, 3 denotes a thermal head, 4 denotes a connector, and 5 denotes a platen roll. The mounting plate 1 is entirely formed of one resilient member, for example, a leaf spring, and a thermal head 3 is fixed to the front portion thereof with screws 6 and 7.
As described above, the flanges 1C and 1D located at both ends of the thermal head 3 have a function of moving the recording paper straight, and are formed integrally with the mounting plate 1. The rear part of the mounting plate 1 is composed of two legs 1A and 1B.
B, a connector 4 for connecting to the thermal head 3 is provided. Further, openings 1A1, 1A are provided at the rear of the legs 1A, 1B.
B1 is drilled (FIG. 2A). On the other hand, on the upper surface 2G of the main body 21 of the recorder 2, the thermal head 3
At the positions corresponding to the leg openings 1A1 and 1B1,
A and 2B are integrally formed with the upper surface 2G, and the opening 1A
1, 1B1. On the contrary, the opening 1A
1, 1B1 may be provided on the upper surface 2G of the main body 21 of the recorder 2, and the projections 2A, 2B may be provided on the legs 1A, 1B of the mounting plate 1, respectively. By such an insertion connection of the opening and the projection,
The mounting plate 1 can be fixed to the main body 21 of the recorder 2. Further, the protrusion 2 is formed on the upper surface 2G of the main body 21 of the recorder 2.
In front of A and 2B, L-shaped pressing members 2E and 2F are integrally formed with the upper surface 2G.
Correspond to the center of both ends of the mounting plate 1. With this configuration, when the magazine 22 is housed in the main body 21 of the recorder 2 (FIG. 1), the platen roll 5 provided in front of the magazine 22 pushes up the thermal head 3 so that the center of the mounting plate 1 It comes into contact with the pressing members 2E and 2F (FIG. 1). At this time, the central portion of the mounting plate 1 is pressed downward from above with the fitting point as a fulcrum, so that the thermal head 3 is pressed against the platen roll 5 with a strong force. The force acting on the mounting plate 1 in this case will be described below with reference to FIG.
That is, the projections 2 are provided at the openings 1A1 and 1B1 which are the insertion locations.
A, 2B, the forces H1 and H2 pushing upwards, and the central portion has forces F pushing downwards from the pressing members 2E and 2F.
1, F2, and forces G1 and G2 for pushing upward from the platen roll 5 act on the front part, respectively. Meanwhile, body 2
As shown in FIG. 2 (B), details of the projections 2A, 2B and the pressing members 2F, 2E integrally formed with the upper surface 2G of the reinforcing member 2B1, 2B2, 2A1, 2A2, 2E are shown in FIG.
1, 2E2, 2F1, and 2F2 are provided. As described above, this is because the mounting plate 1 has strong forces H1, H2 and F1,
F2 (FIG. 2A) acts, and as a reaction, a strong force acts on the protrusions 2A, 2B and the pressing members 2E, 2F, so that they are not broken by them.

Hereinafter, the operation of the present invention having the above configuration will be described. As described above, the thermal head mounting plate 1
A thermal head holding mechanism can be configured by simply forming one resilient member, for example, a leaf spring, and fitting the mounting plate 1 to the upper surface 2G of the main body 21 of the recorder 2 without using a screw or the like. Accordingly, first, the number of components is one, and the configuration is extremely simplified. Next, to attach the mounting plate 1 to the recorder 2, as shown in FIG.
2 is taken out of the main body 21 of the recorder 2 in the direction of arrow S, and the mounting plate 1 is held close to the main body 21 by hand.
Further, after the mounting plate 1 is brought close to the upper surface 2G of the main body 21 and passed through the pressing members 2E and 2F (FIG. 3B), the leg 1
A, a projection 2A of the upper surface 2G is provided in the opening 1A1, 1B1 of the 1B,
2B is inserted (FIG. 3C). In this state, when the magazine 22 is stored in the main body 21 in the direction of the arrow T (FIG. 3D), the thermal head 3 is moved by the platen roll 5.
Is pushed up, and the center of the mounting plate 1 is
Contact E and 2F. As a result, the entire mounting plate 1 presses the front thermal head 3 against the platen roll 5 in an extremely flexible state by the action of the plate spring. Conversely, to remove the mounting plate 1 from the main body 21 of the recorder 2, the operation reverse to the above, that is, the magazine 22 is pulled out from the main body 21, and the platen roll 5 and the pressing members 2E, 2F
The mounting plate 1 is released from the binding force of FIG.
The openings 1A1 and 1B1 of A and 1B are removed from the projections 2A and 2B (FIG. 3B), and the mounting plate 1 is taken out of the recorder 2 (FIG. 3A). No tools are used for such attaching and detaching operations, and the attaching and detaching time is dramatically reduced as compared with the conventional case.

[0009]

As described above, according to the present invention, the mounting plate 1 on which the thermal head 3 is mounted at the front portion is formed by one resilient member, and the flanges located at both ends of the thermal head 3 are provided. 1C and 1D are formed integrally with the mounting plate 1, and the rear portion of the mounting plate 1 is inserted into the main body 21 of the recorder 2 by fitting the openings 1A1, 1B1 and the projections 2A, 2B.
A thermal head holding mechanism characterized in that the thermal head 3 is pressed against the platen roll 5 by fixing the thermal head 3 to the platen roll 5 by pressing the central portion of the mounting plate 1 with the fitting point as a fulcrum. Technical measures have been taken. According to the above configuration, the thermal head mounting plate 1
Since the whole is formed by one resilient member, for example, a leaf spring, there is no need for conventional adjusting screws, coil springs and related parts. Further, the flanges 1C and 1D for the straight advance of the recording paper are also formed integrally with the mounting plate 1. Therefore, the thermal head holding mechanism is extremely simplified by having one component. Further, since the thermal head mounting plate 1 is composed of one resilient member, the fixing means for fixing to the recorder is not a screw as in the related art, but a fitting connection of a projection and an opening is used. Therefore, no tools are required for the attaching / detaching operation, and the attaching / detaching time is shortened. In other words, the thermal head holding mechanism has the technical effect of simplifying the configuration by using only one component and shortening the time required for attaching and detaching by eliminating the need for tools for attaching and detaching operations.

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a detailed view showing an embodiment of the present invention.

FIG. 3 is an operation explanatory view of the present invention.

FIG. 4 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mounting plate 2 Recorder 3 Thermal head 5 Platen roll 21 Main body 1C, 1D Flange 1A1, 1B1 Opening 2A, 2B Projection

Claims (4)

(57) [Scope of request for utility model registration] An attachment plate on which a thermal head is attached is formed by a single resilient member, and flanges located at both ends of the thermal head are integrally formed with the attachment plate. Then, the rear part of the mounting plate 1 is fixed to the main body 21 of the recorder 2 by inserting and connecting the openings 1A1 and 1B1 with the projections 2A and 2B. A thermal head holding mechanism wherein the thermal head 3 is pressed against a platen roll 5 by pressing a central portion. 2. The thermal head holding mechanism according to claim 1, wherein said resilient member is a leaf spring. 3. The openings 1A1 and 1B1 are formed in legs 1A and 1B constituting a rear portion of the mounting plate 1, and the projections 2
2. The thermal head holding mechanism according to claim 1, wherein A and 2B are formed integrally with the upper surface 2G of the main body 21 of the recorder 2. 4. An L-shaped pressing member 2E, 2F is integrally formed on the upper surface 2G of the main body 21 of the recorder 2 with the upper surface 2G. 2. The thermal head holding mechanism according to claim 1, wherein the central portion is in contact with the thermal head.