JP2535669Y2 - Printer head - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer head in which a fan unit and a cover for covering the fan unit are screwed to a heat sink attached to a head body.

[0002]

2. Description of the Related Art An example of this type of printer head is shown in FIG.
8 to FIG. In FIG. 6, a heat sink 2 is attached to the back of the head body 1. The heat sink 2 includes a front heat sink 3 and a rear heat sink 4.
It is composed of As shown in FIG. 7, four screw holes 4a for mounting a fan device are provided on the rear surface of the rear heat sink 4, and two screw holes 4b for mounting a cover are provided below. I have. In addition, two screw holes 3a for attaching a cover are provided in the upper part of the rear part of the front heat sink 3.

On the other hand, the casing of the fan device 5
As shown in FIG. 6, four screw insertion holes 5a through which the screws 6 are inserted are provided. As shown in FIGS. 6 and 8, the cover 7 that covers the fan device 5 is provided with four screw insertion holes 7a through which the screws 8 are inserted.

[0004] The fan device 5 is attached to the heat sink 2.
To mount the fan, the four screws 6 are passed through the screw insertion holes 5a of the fan device 5, and then the screw holes 4a of the rear heat sink 4 are inserted.
Screw. Then, in order to attach the cover 7 covering the fan device 5 to the heat sink 2, two screws 8 are passed through the screw insertion holes 7a of the cover 7, and then the rear heat sink 4
After screwing the two screws 8 through the screw insertion holes 7 a of the cover 7, the screws 8 are screwed into the screw holes 3 a of the front heat sink 3. Thereby, the fan device 5 and the cover 7 are screwed to the heat sink 2.

[0005]

However, in the above-mentioned conventional configuration, when screwing the fan device 5 and the cover 7 to the heat sink 2, eight screws 6 and 8 are required, and eight screw holes 3a are required. , 4a, 4b, and eight screw insertion holes 5a, 7a.
For this reason, there is a problem in that the number of screw holes and screw insertion holes is large, so that the work of forming them is troublesome, and in that the number of screws is large, assembly is troublesome.

As a configuration for solving such a problem,
A configuration is also conceivable in which the fan device 5 and the cover 7 are fastened together to the heat sink 2 with four screws. However, in this configuration, when the screws are tightened, the three components, that is, the heat sink 2, the fan device 5, and the cover 7 must be integrally held, which makes the operation difficult and requires special jigs. In addition, since the screws are jointly fastened, there is a drawback that a required tightening strength cannot be obtained, and the above configuration has not been actually used.

Accordingly, an object of the present invention is to reduce the number of screw holes and screw insertion holes when screwing a fan device and a cover to a heat sink, thereby improving manufacturability and reducing the number of screws. Another object of the present invention is to provide a printer head which can be easily assembled.

[0008]

According to the present invention, there is provided a printer head comprising a fan unit and a cover for covering the fan unit, which are screwed to a heat sink attached to the head body. Providing a hole, providing N screw insertion holes corresponding to the N screw holes in the fan device, and providing (N-1) or one screw insertion hole in the cover; To the heat sink, 1 to (N-1)
The screws are attached by screwing the screws through the screw insertion holes of the fan device, and then attaching the cover and the fan device to the heat sink (N-
1) One or more screws are screwed through the screw insertion hole of the fan device and the cover and screwed into the screw hole, and attached by screwing.

[0009]

In the above means, for example, four screw holes are provided in the heat sink as N, and four screw insertion holes are provided in the fan device, and two screw insertion holes are provided as (N-1) or one. The case where it is provided on the cover will be described. In this case, first, the fan device is screwed and attached to the heat sink with two screws. Next, in this mounting state,
The cover and fan unit are screwed or fastened to the heat sink with two screws.

Thus, the number of screw holes and screw insertion holes can be reduced, and the number of screws can be reduced. Since the fan device is mounted on the heat sink with two screws, and the cover is mounted on the heat sink with two more screws in this mounted state, there is no need to hold the three components integrally. And a special jig is not required. Further, the fan device
Since it is attached to the heat sink with two screws and fastened together with the cover with two screws, a predetermined attachment strength can be obtained. Also, since the cover originally does not require much mounting strength, it is sufficient to fasten the cover together with two screws.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a printer head of a wire dot printer will be described below with reference to FIGS. First, in FIGS. 1 and 2,
A heat sink 12 is attached to the back of the head body 11 with two screws 13. The head main body 11 is provided with a dot printing wire and a driving unit (neither is shown) for driving the wire.

The heat sink 12 has a substantially rectangular shape as a whole and includes a front heat sink 14 and a rear heat sink 15. A large number of fin portions 14a and 15a are formed on the front heat sink 14 and the rear heat sink 15. As shown in FIG. 2, the rear surface of the rear heat sink 15 is provided with N screw holes 15b, for example, N at four corners thereof.

The fan device 16 is constructed by disposing a fan and a fan motor (not shown) in a casing 17 having a substantially rectangular shape as a whole. As shown in FIG. 1, four screw insertion holes 17 a are provided at four corners of the casing part 17 so as to correspond to the screw holes 15 b of the rear heat sink 15.

On the other hand, a cover 18 for covering the fan device 16
1 and 3 has a substantially rectangular cylindrical shape as a whole, and its right end in FIG. 1 which is one end thereof is closed. Peripheral wall portion 18a of cover 18 and closing portion 18
In b, a number of ventilation holes 18c are formed. The closing portion 18b of the cover 18 is located at both upper end portions (N-
For example, two screw insertion holes 18d of 1) to 1 are provided.

Then, the fan device 1 is attached to the heat sink 12.
When attaching 6, for example, 2 which is 1 to (N-1)
After the screws 19 are passed through the two screw insertion holes 17 a on the lower side of the fan device 16, they are screwed into the screw holes 15 b of the rear heat sink 15. In this case, the screws 19 are tightened so that a predetermined mounting strength is obtained for the fan device 16.

Thereafter, when the cover 18 is attached to the heat sink 12 to which the fan device 16 is attached, two screws 19 are inserted through the screw insertion holes 18d of the cover 18 and the two screw insertion holes on the upper side of the fan device 16. After passing through the hole 17a, it is screwed into the screw hole 15b of the rear heat sink 15. Thereby, as shown in FIGS. 4 and 5, the fan device 16 and the cover 18 covering the fan device 16 are attached to the heat sink 12 by being screwed together with the screws 19.

According to this embodiment having such a configuration, first, the fan device 16 is attached to the rear heat sink 15 by two screws 1.
The cover 18 and the fan device 16 are then screwed or fastened to the rear heat sink 15 with two screws 19 in this mounted state. As a result, the number of screw holes 15b and the number of screw insertion holes 17a and 18d can be reduced and the number of screws 19 can be reduced as compared with the conventional configuration (see FIGS. 6 to 8). In this case, the number can be reduced by half.

The fan device 16 is fixed by two screws 19.
Is attached to the rear heat sink 15, and in this mounted state, the cover 18 is further secured with two screws 19.
Unlike the conventional screw-fastening configuration, there is no need to hold three parts together, so work can be performed easily and special jigs are not required. obtain.

Further, the fan device 16 includes two screws 19
And is fastened together with the cover 18 with two screws 19, so that a predetermined mounting strength can be obtained. Also, the cover 18
Since the mounting strength is not originally required so much, it is sufficient to fasten together with the fan device 16 with the two screws 19.

In the above embodiment, when N is 4, two of the four screws 19 are used for co-tightening, but instead of this, one or three screws are co-fastened. Almost the same operation and effect can be obtained for use. Further, in the above-described embodiment, the case where N is 4 is applied. However, the present invention is not limited to this. N may be 5 or more or 3 or less. (N-1) or one screw may be used for joint fastening.

[0021]

As is clear from the above description, the present invention provides (N-1) or one screw insertion hole in the cover, and the fan device is mounted on the heat sink with 1 to (N-1).
Screws are screwed into the screw holes of the fan device and attached to the screw holes, and then the cover and the fan device are attached to the heat sink, and (N-1) or one screw is inserted into the screw holes of the fan device. In addition, when the fan unit and the cover are screwed to the heat sink, the number of screw holes and screw insertion holes is reduced, and In addition to the improved effect, the number of screws can be reduced and the assembly can be easily performed.

[Brief description of the drawings]

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

FIG. 2 is a rear view of a heat sink and a head body.

FIG. 3 is a rear view of the cover.

FIG. 4 is a side view showing an assembled state.

FIG. 5 is a rear view showing an assembled state.

FIG. 6 is a diagram corresponding to FIG. 1 showing a conventional configuration.

FIG. 7 is a diagram corresponding to FIG. 2;

FIG. 8 is a diagram corresponding to FIG. 3;

[Explanation of symbols]

Reference numeral 11 denotes a head body, 12 denotes a heat sink, 15b denotes a screw hole, 16 denotes a fan device, 17a denotes a screw insertion hole, 18 denotes a cover, 18d denotes a screw insertion hole, and 19 denotes a screw.

Claims (1)

(57) [Scope of request for utility model registration] 1. A printer head comprising a heat sink attached to a head body and a fan device and a cover for covering the fan device screwed to the heat sink, the heat sink is provided with N screw holes, and the fan device is provided with the N screw holes. N screw insertion holes corresponding to the screw holes are provided, and (N-1) to one screw insertion hole is provided in the cover, and the fan device is connected to the heat sink by 1 to (N-1). ) Screws are passed through the screw insertion holes of the fan device and screwed into the screw holes and attached, and then the cover and the fan device are attached to the heat sink, and (N-1) or one screw is attached to the heat sink. A printer head, wherein the printer head is mounted by being screwed into the screw hole through the screw hole of the fan device and the screw hole of the cover.