JPH09211667A - Magnetic head pressing mechanism of camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic head pressing mechanism using a film with a magnetic storing part, by which lowering of film pressing accuracy due to manufacturing and fitting errors can be prevented, the film can be pressed always at two portions, and high part accuracy is not needed so as to reduce the cost. SOLUTION: A magnetic head pressing mechanism comprises a magnetic head 9 which can be pressed to the magnetic storing part of a film 11 and writes or reads information in the magnetic storing part, a pressing member 12 which comes into contact with the film 11 at two film contact parts 15, 15 to press the magnetic storing part of the film 11 to the magnetic head 9, and an elastic member 2 for energizing the pressing member 12 in the pressing direction, which are provided in a camera main body 1 loaded with the film 11 having the magnetic storing part. In this case, the fitting part side of the pressing member 12 to the elastic member 2 is formed as a circular-arc part 14. By the circular-arc part 14, the pressing member 12 is fitted in such a manner as to oscillate taking the contact parts which change in position to come into contact with the elastic member 2 as a fulcrum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head pressing mechanism provided in a camera using a film with a magnetic storage section.

[0002]

2. Description of the Related Art As a conventional type film used for a camera, a plurality of perforations are provided at equal intervals per frame, but recently, as a new type film, information can be written or read. There is a film with a magnetic storage unit, and in such a new standard film, one or two perforations are provided for one frame. A camera using such a film with a magnetic storage unit is equipped with a magnetic head for writing information to or reading information from the magnetic storage unit of the film, and further, a pressing pad for pressing the magnetic storage unit of the film against the magnetic head. Is also provided (for example, JP-A-3-278).
No. 042).

FIG. 3 is a plan view of an essential part showing an example of a conventional magnetic head pressing mechanism, and FIG. 4 is a sectional view taken along the line BB in FIG. 4, in which 1 is a camera body and 2 is a pressing member. Spring, 3
Is a vertical bending portion, 4 is a pressing pad, 5 is a concave portion, 6 is a film contact portion, 7 is a pressure plate, 8 is an opening portion, 9 is a magnetic head, 10 is a mounting portion, and 11 is a film with a magnetic memory portion. In a camera using a film with a magnetic memory unit, it is necessary to bring the film into close contact with the magnetic head, and as shown in the figure, two film contact portions 6 formed by the bulging shape formed on the pressing pad 4 on the film 11 with the magnetic memory unit. , 6 are brought into contact with each other to press the magnetic recording film 11 with the magnetic head 9 (see, for example, JP-A-4-11237 and JP-A-6-118501).

According to such a magnetic head pressing mechanism,
Since the pressing pad 4 comes into contact with the film 11 with the magnetic memory portion at the two film contact portions 6 and 6, there is an advantage that the film is less likely to be scratched and the pressing precision with respect to the film is good.

[0005]

However, since the pressing pad 4 contacts the film 11 with the magnetic storage portion at the two film contact portions 6 and 6, the pressing pad 4 is not tilted to the pressing spring 2. It is difficult to attach, and there is a concern that the aforementioned advantages will not be fully utilized.

Therefore, an object of the present invention is to prevent the deterioration of the film pressing precision due to manufacturing and mounting errors in the camera using the film with the magnetic storage portion as described above, and to always press the film at two places. Another object of the present invention is to provide a magnetic head pressing mechanism that can be manufactured at low cost without requiring high precision of parts.

[0007]

In order to solve the above problems, the invention according to claim 1 is capable of press-contacting the magnetic storage portion of the film in a camera body in which a film having a magnetic storage portion is loaded. A magnetic head for writing or reading information to or from the magnetic storage portion is brought into contact with the film at two positions, for example, due to a bulging shape, in order to press the magnetic storage portion of the film against the magnetic head. In a magnetic head pressing mechanism of a camera including a pressing member such as a pad and an elastic member such as a pressing spring for urging the pressing member in the pressing direction, a magnetic memory portion of a film is contacted at two locations by a bulging shape. The pressing member such as a pad,
The present invention is characterized in that the elastic member such as a pressing spring that urges in the pressing direction is attached so as to be swingable about a contact portion whose position changes and comes into contact with the elastic member.

As described above, in a camera using a film with a magnetic memory portion, the position of the pressing member that contacts the magnetic head of the film with the magnetic head at two points changes with respect to the elastic member that urges in the pressing direction. Since the magnetic head pressing mechanism is mounted so as to be swingable with the contact portion that comes into contact with the elastic member as a fulcrum, the elastic member is oscillated with the contact portion where the pressing member changes position and comes into contact with the elastic member as a fulcrum. As a result, the film can always be pressed at the two positions of the pressing member. Moreover, it is sufficient to process the contact portion, which changes the position serving as a fulcrum when swinging with respect to the elastic member, into the pressing member, and does not require high part precision.

The invention according to claim 2 is based on claim 1.
A magnetic head pressing mechanism for a camera according to claim 1, wherein the pressing member such as a pad that comes into contact with the film at two points due to the bulging shape is attached to the elastic member such as a pressing spring that urges in the pressing direction. , A structure formed in an arcuate portion.

As described above, by the arcuate portion formed on the mounting portion side of the pressing member with respect to the elastic member, the contact portion where the pressing member changes position and comes into contact with the elastic member is a fulcrum. Therefore, it is only necessary to process the arcuate portion on the pressing member, so that high part precision is not required.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a magnetic head pressing mechanism for a camera according to the present invention will be described below with reference to FIGS. First, FIG. 1 is a main part plan view showing a magnetic head pressing mechanism as an example to which the present invention is applied, and FIG. 2 is a sectional view taken along the line AA. 1 and 2, 1 is a camera body, 2 is an elastic member (pressing spring), 3 is a vertical bending portion, 7 is a pressure plate, 8 is an opening portion, 9 is a magnetic head, 10 is an attaching portion, and 11 is Film with magnetic memory,
Reference numeral 12 is a pressing member (pressing pad), 13 is a concave portion, 14 is an arcuate portion, and 15 is a film contact portion.

That is, the camera body 1 is provided with a pressing spring 2 made of a leaf spring, which is an elastic member, so as to urge the tip of the pressing spring 2 in the direction of abutting the magnetic head 9 side, which will be described later. As shown in the drawing, bent tip portions 3, 3 and 3 in three directions are formed at the tip of 2.
Further, an opening 8 is formed in the pressure plate 7 arranged in parallel with the camera body 1, and information is written in or read from the magnetic storage section of the film 11 with a magnetic storage section, which will be described later, in the opening 8. A magnetic head 9 for use is provided. The magnetic head 9 is attached to the pressure plate 7 by attaching or screwing with the attaching portions 10 and 10. Then, when the film 11 with the magnetic storage section passes between the camera body 1 and the pressure plate 7, the film with the magnetic storage section is attached to the magnetic head 9 which is brought into pressure contact with the magnetic storage section of the film 11 with the magnetic storage section. Pressing pad 12 which is a pressing member for pressing 11
Is a vertical bending portion 3, 3, 3 in the three directions at the tip of the pressing spring 2.
It is attached in the state surrounded by.

As shown in FIG. 1 and FIG. 2, the pressing pad 12 has three bent portions 3, 3 at the tip of the pressing spring 2 in three directions.
In the illustrated example, the vertical curved portions 3 and 3 are formed in a shape surrounded by the concave portions 13 and 3 with which the concave portions 13 and 3 are engaged with each other with a margin.
13 is formed. Then, as shown in FIGS. 1 and 2, the side of the pressing pad 12 which is surrounded by the upright portions 3, 3, 3 in three directions and faces the presser spring 2 has an arc-shaped portion with a substantially high central portion. 14 are formed. Further, as shown in FIG. 1, the pressing pad 12 has two film contact portions 15, 15 on the left and right when viewed from above and forming a bulging shape toward the magnetic head 9. The left and right film contact portions 15 and 15 are substantially U-shaped in a plan view.

The pressing pad 12 described above has two surfaces in which an arcuate portion 14 having a substantially high central portion makes point contact with the surface of the tip end portion of the pressing spring 2 which is biased toward the magnetic head 9 side. While the upright portions 3 and 3 are engaged with the recessed portions 13 and 13, of the pressurizing spring 2 while the upright portion is in contact with the other surface.
It is attached to the tip. In the illustrated example,
The pressing pad 12 is a pressing spring 2 with respect to the magnetic head 9 side.
However, since the film contact portions 15 and 15 come into contact with the magnetic head 9 side, the film contact portions 15 and 15 never come off from the pressing spring 2.

According to the magnetic head pressing mechanism constructed as described above, as shown in FIGS. 1 and 2, the film 1 with the magnetic storage portion passing between the camera body 1 and the pressure plate 7.
When 1 is present, the magnetic storage portion of the film 11 with the magnetic storage portion is pressed against the magnetic head 9 by the two film contact portions 15 and 15 on the left and right which are substantially U-shaped in plan view of the pressing pad 12. Becomes That is, the magnetic storage portion of the film 11 with the magnetic storage portion has two film contact portions 15 along the film feed direction of the pressing pad 12 urged by the pressing spring 2 in the direction of contacting the magnetic head 9.
The magnetic head 9 is pressed by 15. Therefore, the magnetic head 9 records the predetermined information in the magnetic storage section of the film 11 with the magnetic storage section during the film winding.

Here, the pressing pad 12 is shown in FIGS.
As shown in FIG. 3, since the side facing the presser spring 2 is surrounded by the upright portions 3, 3, 3 in the three directions to form an arcuate portion 14 having a substantially central portion raised, the arcuate portion 14 is formed. However, as shown in the figure, it is in contact with the plate surface of the presser spring 2 at one point. Further, since there is a margin in the engagement between the concave portions 13 of the pressing pad 12 and the upright portions 3 of the pressing spring 2, the pressing pad 12 itself can swing with respect to the pressing spring 2. . For this reason, the pressing pad 12 swings with the arcuate portion 14 as a fulcrum with respect to a single contact portion whose position changes and contacts the plate surface of the pressing spring 2.
2 is always pressed at two points against the magnetic storage portion of the film 11 with the magnetic storage portion by facing the magnetic head 9 by the two film contact portions 15 and 15 along the film feeding direction. .

Therefore, in particular, with respect to the parts such as the pressing spring 2 and the pressing pad 4, it is possible to prevent the deterioration of the film pressing accuracy due to the manufacturing and mounting errors. In addition, the pressing pad 12 is surrounded by the upright portions 3, 3, 3 in three directions, and the side facing the presser spring 2 has an arc-shaped portion 14 with a high central portion.
Since it only needs to be machined, and high precision of parts is not required, the cost can be reduced.

In the above embodiment, the leaf spring (pressing spring) is used as the elastic member for urging the pressing member (pressing pad) in the pressing direction, but the present invention is not limited to this. Instead, it may be any other elastic member having flexibility. In addition, it goes without saying that specific detailed structures and the like can be appropriately changed.

[0019]

As described above, according to the magnetic head pressing mechanism of the camera of the first aspect of the present invention, the pressing member that comes into contact with the magnetic memory portion of the film at two points with respect to the magnetic head is provided in the pressing direction. Since it is mounted so that it can oscillate about the contact part where the position changes and comes into contact with the elastic member that urges against, By moving the film, the film can be constantly pressed at the two positions of the pressing member, that is, the deterioration of the film pressing accuracy due to manufacturing and mounting errors can be prevented. Moreover, since it is only necessary to process the contact portion, which changes the position serving as the fulcrum when swinging with respect to the elastic member, into the pressing member, and it is not necessary to have high part precision, so that the cost can be reduced.

According to the magnetic head pressing mechanism of the camera of the second aspect of the invention, the arcuate portion formed on the mounting portion side of the pressing member with respect to the elastic member is used.
As described above, the pressing member changes its position with respect to the elastic member and oscillates around the contact portion that is in contact with the elastic member. That is, since it is sufficient to process the arcuate portion on the pressing member, high component accuracy is achieved. Costs can be reduced without the need.

[Brief description of drawings]

FIG. 1 is a plan view of relevant parts showing a magnetic head pressing mechanism as an example to which the present invention is applied.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a main part plan view showing an example of a conventional magnetic head pressing mechanism.

4 is a sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 camera body 2 elastic member (pressing spring) 3 upright portion 7 pressure plate 9 magnetic head 11 film with magnetic memory section 12 pressing member (pressing pad) 13 concave section 14 arcuate section 15 film contact section

Claims (2)

[Claims] 1. A magnetic head capable of being pressed into contact with the magnetic storage portion of the film in a camera body in which a film having a magnetic storage portion is loaded, and writing or reading information to or from the magnetic storage portion. A magnetic head pressing mechanism for a camera, comprising: a pressing member that comes into contact with the film at two locations to press the magnetic storage portion of the film against the head; and an elastic member that biases the pressing member in the pressing direction. A magnetic head pressing mechanism for a camera, wherein the pressing member is attached so as to be swingable around a contact portion, which is in contact with the elastic member when its position is changed. 2. The magnetic head pressing mechanism for a camera according to claim 1, wherein the mounting portion side of the pressing member with respect to the elastic member is formed in an arcuate portion.