JPS5918782Y2 - portable video camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a portable video camera, particularly a start switch device.

Portable video cameras often have a VTR recording start switch attached to a part of the grip, and this switch is usually a bushing switch.

In other words, this is to make operations easier when shooting, but on the other hand, the button switch has the disadvantage that it is prone to erroneous operation, such as pressing it carelessly and causing the VTR to operate unnecessarily when it is in standby mode. There are many cases of this.

This invention was made in view of these points, and its purpose is to
The object of the present invention is to propose a new rotary start switch that can eliminate the above-mentioned erroneous operation of the bushing switch.

A specific example of the present invention will be explained below with reference to the drawings.

FIG. 1 is a longitudinal sectional front view of the main parts of an example of a portable video camera according to the present invention, in which the front contour shape is shown by imaginary lines, 1 is the main body of the portable video camera, 2 is the objective lens, and 3 is the finder. , 4 indicates a part of the side wall constituting the camera body, and to this left side wall 4 are attached a grip, a starter ring, and other members, which will be described below.

That is, in the figure, 5 indicates a grip holder attached with a bent cross section that follows the surface of the side wall 4 and extends from the approximate center position to the lower part, and is made of, for example, a resin molded product or a light alloy die-cast. A cylinder 6 having a partition plate 7 inside is integrally formed on the outer surface of the upper part of the holder 5, and screws are installed at both ends of the cylinder 6, respectively, with respect to a through hole provided in the partition plate 7 on a horizontal axis passing through the center. Rod 8 having parts 8a, 8b
The rod 8 is supported by inserting the right end threaded portion 8a of the partition plate 7 and tightening nuts 9 and 10 onto the threaded portion 8a on both sides of the partition plate 7.

Note that 5' indicates a recess formed on the inner surface of the holder 5, and this recess 5' has a larger diameter than the inner diameter of the cylinder 6 and is concentric with both recesses, communicating with the right side of the cylinder and the inside of the camera body. .

Further, reference numeral 11 indicates a well-known grip, and the illustrated grip 11 is made of a molded product similar to the holder 5, and the right side of the head of the grip handle 12 has an inner diameter seat having the same outer diameter as the cylinder 6. A circular boss 13 having a hollow recess 13' and a large diameter taper boss 14 are provided on the left side, and the taper boss 14 also has a counterbore recess 1 having a larger diameter than the right side recess 13'.
4' is formed, and the above-mentioned rod 8 is inserted as shown in the figure into the communication hole which connects the centers of the recessed parts 13' and 14' on both sides, and the rod 8 is inserted into the communication hole, and the grip handle 12 is gripped to freely move the camera body 1. It is designed so that it can be operated easily.

In this example, as means for adjusting the longitudinal inclination angle of the camera body 1 with respect to the grip 11, a collar 15 is interposed between the above-mentioned nut 9 and the counterbore-shaped recess 13' of the circular boss 13, and the taper boss 14 At this side, screw the screw of the set heir 16 into the left end threaded portion 8b of the rod 8,
The end face of the cylindrical portion 16' of this child 16 is brought into contact with the inner end of the counterbore-like recess 14', and the inclination angle between the camera body 1 and the grip 11 is selected by unscrewing and screwing the set child 16, And the setting is such that it can be set.

However, such an inclination adjustment means is a conventional example.

By the way, the present invention has a holder 5, for example, in contrast to the connection structure of the video camera body 1 and the grip 11 as shown in the figure.
A starter ring 17 such as a resin molded product is fitted around the cylinder 6 and the circular boss 13 of the grip 11.

In this case, the outer peripheral surface of the starting ring 17 is prevented from protruding outward from the outer wall surfaces of the camera body 1 and the grip 11.

That is, the maximum value of the distance between the outer circumferential surface of the starter ring 17 and the central axis position of the rod 8 is the distance from the center of the insertion hole to the periphery of the surface of the main body 1 and the grip 11 having the insertion hole for the rod 8. Selected below the minimum value.

When recording a video signal to a VTR using a camera, the starting ring 17 is rotated by about 45' in a predetermined direction with the thumb or index finger of the hand gripping the grip handle 12, and the The VTR, which is connected to the camera body 1 via a cable and is in a standby state, starts operating at this point, and therefore, the VTR that is connected to the camera body 1 via a cable and is in a standby state starts operating at this point. Audio signals are also recorded at the same time.

As shown in FIG. 3, the specific structure of the starter ring 17 is, for example, as shown in FIG. The circular bosses 13 of the grip 11 are loosely fitted onto the left inner surface 19b (FIG. 1), so that the annular partition 18 faces inside the cylinder 6.

An arcuate piece 20 is formed on the inner edge of this annular partition 18 and extends to the right and has an inclined part 20' at its free end. (see Fig. 2), arcuate piece 20
from this guide groove 21 to the above-mentioned recess 5. It is protruded inward.

That is, in this example, the arcuate piece 20 is displaced in one direction within the guide groove 21 by rotating the start ring 17 (for example, counterclockwise as shown by arrow a in FIG. 2, but the selection of the direction is a matter of design). ), the inclined portion 20' of this arcuate piece is used to turn on a leaf switch, for example, which will be described next, but the start ring 17 must always be biased in the direction of opening the switch.

Therefore, as an example of a simple biasing means, the desired effect can be achieved by directly connecting the spring 22 to the arcuate piece 20 and imparting an elastic biasing force in the clockwise direction to the spring 22.

However, the connection structure of the spring 22 as shown in the drawings is merely an example for convenience of explanation.

In addition, 23 in the figure is a damper made of rubber or elastic material applied to both ends of the guide groove 21, and this serves as a soundproofing measure in the case of a camera equipped with a built-in microphone.

In FIG. 1, reference numeral 24 indicates a leaf switch arranged at a suitable location inside the camera, and 25 indicates a slide pin provided corresponding to the leaf. Presence (see Figures 2 and 3)
, and is elastically biased in that direction, and when the start ring 17 is rotated with a fingertip as described above, the slide pin 2
5 is pressed by the inclined portion 20' of the arcuate piece to bring the leaf of the leaf switch 24 into contact (switch on).

Furthermore, if the finger is removed from the start ring 17 and it is restored, it is natural that the leaf switch 24 will also be in the OFF state.

In this way, the start switch of the present invention is turned on and off by the rotary start ring, so there is almost no erroneous operation like that observed with conventional bushing switches, and there is no possibility of erroneous operation such as that caused by erroneous switch operation as mentioned at the beginning. It is possible to eliminate the various inconveniences caused by this, and together with its rational configuration, it can bring about excellent practical benefits.

Further, since the outer peripheral surface of the start ring does not protrude outward from the outer wall surfaces of the camera body and the grip, it is possible to avoid malfunctions caused by the user accidentally touching the start ring.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the main part showing an example of a portable video camera to which the present invention is applied, Fig. 2 is a sectional view taken along line A-A, and Fig. 3 is a partial longitudinal sectional view showing an example of a starting ring. FIG. 1 is the video camera body, 5 is the grip holder 6 is a cylinder, 7 is its partition, 8 is a rod, 11 is a grip, 12 is a grip handle, 13 is a circular boss, 17 is a starter ring, 18
20 is an annular partition, 20 is an arcuate piece, 20' is an inclined portion, 21 is a guide groove, 24 is a leaf switch, and 25 is a slide pin.

Claims (1)

[Scope of utility model registration request] A main body of a portable video camera, a grip attached to the main body by a connecting shaft to support the main body, and a connecting portion between the main body and the grip that is rotatable about the position of the connecting shaft as a rotation center. It consists of a start ring that is fitted and provided in such a state, and a switch that is turned on and off according to the rotation of this start ring, and is located from the central axis position of the connection shaft on the outer wall of the star)-1, 1 ring. The maximum value of the distance is selected to be equal to or less than the minimum value of the distance from the center of the hole to the periphery of the surface of the main body and the grip in which the hole through which the connecting shaft is inserted is provided.