JPH03247175A - Video camera - Google Patents

Abstract

PURPOSE:To record an audio signal as well as a video signal altogether even without provision of an accessory shoe by providing a mount part able to mount a battery to an FM tuner pack removably and driving both a video camera and the FM tuner pack with the battery mounted to the mount part of the FM tuner pack. CONSTITUTION:An FM tuner pack 28 is mounted to a battery mount part 19 at the rear side of a video camera 10. That is, an engagement claw 21 of the battery mount part 19 is engaged with an engagement slot 30 of an adaptor pack 28 and a lock claw 23 is used to lock the engaged adaptor pack 28. Then a battery 20 is mounted to the battery mount part 31 of the FM tuner pack. This operation is attained by engaging the engagement claw 32 of the adaptor pack 28 with the engagement slot 22 of the battery 20 and using the lock claw 33 to lock the battery. That is, the FM tuner pack is inserted between the video camera main body 10 and the battery 20, resulting that the three components are coupled together.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a video camera, and more particularly to a video camera in which images captured through an optical system are recorded on a magnetic tape in a tape cassette by a built-in VTR. Summary of K Invention 1 With the spread of video cameras, the desire of users to create tapes with elaborate content in an easier and more enjoyable manner is increasing. Therefore, an FM tuner pack is provided that is removably attached to the attachment part where the battery is attached.
Moreover, this FM tuner bag is provided with a battery mounting part, and the FM tuner pack is sandwiched between the camera body and the battery, so that the three are combined. By recording the resulting audio signal along with the video signal onto a magnetic tape using a VTR, it is possible to easily create a tape containing music. K Conventional technology λ A video camera captures images through an optical system into a COD
The electric signal is converted into an electric signal by the converter, and the electric signal is subjected to predetermined processing, and then recorded on a magnetic tape in a tape cassette by a rotary head of a built-in VTR. Audio signals can also be recorded on such magnetic tapes at the same time. That is, by supplying an audio signal from the outside or by supplying the audio signal by a microphone mixing device, the audio signal is recorded together with the video, making it possible to create a tape with music or a tape with narration. [Problems to be solved by invention K] In order to simultaneously record audio signals in this way, FM
An adapter bag equipped with a tuner and microphone mixer may be used. Such an adapter bag is connected to the video camera using an accessory shoe provided on the video camera. One type of accessory shoe is attached to a pedestal, and the connection part of the adapter bag is connected to this part. However, with the demand for smaller video cameras, there is a trend toward the supply of video cameras without accessory shoes. Accessory shoes not only hinder miniaturization, but also
There is no sense of unity in design, and this impairs the design of the video camera. Furthermore, even if there is an accessory shoe, the adapter back connected via the accessory shoe cannot be driven by the video camera's power supply and therefore requires an independent power supply. That is, the back of a conventional FM tuner is equipped with an independent power source such as a button battery or a dry battery. The present invention has been made in view of these problems, and it is an object of the present invention to provide a video camera that can record audio signals together with video signals without the need for an accessory shoe. This is the purpose. Means for Solving Problem K] The present invention is a video camera in which images captured through an optical system are recorded on a magnetic tape in a tape cassette by a built-in VTR, and the video camera is installed in a cabinet. A video camera driven by a battery attached to a battery attachment part provided in the camera body, the video camera being detachably attached to the camera body by the battery attachment part, and having an FM tuner. An FM tuner pack is provided, and the F
The M tuner pack is provided with a mounting part to which the battery can be removably mounted, and the video camera and the F
It was designed to drive both the M tuner back and the M tuner back. K effect] Therefore, by attaching the FM tuner pack to the battery attachment part provided in a part of the cabinet i, and by attaching a battery to the battery attachment part of this FM tuner pack, the battery can be used to connect the video camera and FM.
It becomes possible to drive the tuner pack together. Therefore, it becomes possible to record the audio signal obtained by the FM tuner pack together with the video signal on the magnetic tape in the tape cassette using the VTR, and it becomes possible to easily create a tape containing music or a tape containing narration.

【Example】

1 and 2 show a video camera according to an embodiment of the present invention, and this video camera is equipped with a lens barrel 11 at the front left side of a cabinet 10 thereof. An optical lens is arranged inside the lens barrel 11, and an image is captured through this optical lens. Further, a plurality of camera operation buttons 12 are arranged on the outer side of the lens barrel 11. In addition, a viewfinder 1 is rotatably mounted on the top of the lens barrel 11.
3 is installed. Further, a video operation button 14 is provided on the top of the cabinet 10, and is used to perform operations such as switching the mode of the VTR built in the cabinet 10. Further, a microphone 15 is provided on the front side of the cabinet 10 so that audio can be recorded. Furthermore, a grip belt 16 is provided on the right side of the cabinet 10, and the video camera can be held with the right hand by this belt 16. A battery mounting part 19 is provided on the back side of the cabinet 10, and a battery 20 is installed in this battery mounting part 19.
It is designed to be removably attached. battery it
Engagement claws 21 are provided on both sides of the upper and lower portions of the portion 19, and these engagement claws 21 are adapted to be engaged with engagement grooves 22 provided on both the upper and lower sides of the battery 20. ing. In addition, the installed battery 20 is connected to the lock claw 2.
It is locked by 3. A release lever 24 is provided on the cabinet 10 in order to retract the lock claw 23. Further, a conductive contact pin 25 is provided so as to protrude from the battery mounting portion 19, and the battery 20 and the video camera are electrically connected by this contact pin 25. A 1M tuner bag 28 containing an FM tuner is inserted between the video camera 10 and the battery 20 using the battery mounting portion 19. 1M
The tuner bag 28 is composed of a substantially rectangular parallelepiped cabinet, and has an engaging portion 29 on the front side thereof. Engagement grooves 30 are provided on both upper and lower sides of the engagement portion 29, and these engagement grooves 30 receive the left and right engagement claws 21 of the battery mounting portion 19. Further, on the back side of the adapter pack 28 of this FM tuner, a battery mounting section 31 having a structure substantially similar to the battery mounting section 19 of a video camera is provided. That is, engagement claws 32 are provided on the upper and lower sides of the battery mounting portion 31 of the adapter pack 28, respectively, and a locking claw 33 is provided so as to be retractable. Also, a conductive contact pin 34 protrudes. Further, a release lever 35 is provided on the side surface of the adapter pack 28, and the lock claw 33 is retracted by this release lever 35. In addition, the FM tuner back 28 has figures 2 and 3.
As shown in the figure, a rondo antenna 39 is extendably attached to the negative side thereof. Further, a microphone 40 is attached to the opposite side. The microphone 40 can be retracted and protruded from the side, as shown in FIG. 3, when used. Therefore, when performing microphone mixing, the microphone 40 may be projected as shown in FIG. Further, a connection cord storage section 41 is formed in the battery mounting section 31 of this adapter pack 28, and this storage section 4
The connection cord can be stored in 1. A lid plate 42 is attached to the storage section 41. Next, the circuit configuration of the FM tuner back 28 will be explained. As shown in FIG. 4, the 1M tuner back 28 includes a pair of power lines 45 and 46. These power lines 45 and 46 are connected to the positive and negative terminals of the battery 20, and power is taken out from the battery 20 through the contact bin 34. and power line 45.
A power supply circuit 47 is connected between the terminals 46 and 46. Power supply circuit 4
7 drives a tuner 48. The adapter punk 28 includes the tuner 48, the microphone 40, and an external input jack 50 as signal sources. The tuner 48, microphone 40, and external input jack 50 are connected to corresponding level conversion circuits 51 and 52, respectively.
．． 53, and these circuits 5
The outputs of 1, 52, and 53 are connected to variable resistors 55, 56, and 57 of the mixing circuit 54, respectively. Further, the outputs of the variable resistors 55 and 56 are added by an adding circuit 58. Further, the output of the adding circuit 58 and the output of the variable resistor 57 are added by an adding circuit 59. The output of the adder circuit 59 is supplied to a microphone output plug 61 via a level converter circuit 60. Further, an amplifier 62 is connected to the output terminal of the adder circuit 59, and the output of the amplifier 62 causes the earphone 6 to
3 is now driven. A series circuit of a coil 66 and a resistor 67 is connected to the negative terminal of the microphone output plug 61 for supplying audio signals to the VTR of the video camera body 10, and the plug 61 is grounded via these impedance circuits. 68 and is also connected to a switch 69. Switch 69 is connected between power supply circuit 47 and power supply line 46 . Next, the operation when creating a tape with music or a tape with narration using the FM tuner pack 28 will be explained. In this case, the FM tuner pack 28 shown in FIG. 3 is attached to the battery attachment part 19 on the back side of the video camera 10, as shown in FIGS. 1 and 2. That is, the engaging claw 21 of the battery mounting portion 19 is engaged with the engaging groove 30 of the adapter back 28, and the adapter back 28 coupled with the locking claw 23 is locked. Then, the battery 20 is attached to the battery attachment portion 31 of the FM tuner pack 28. This operation is achieved by engaging the engagement claw 32 of the adapter back 28 with the engagement groove 22 of the battery 20 and locking it with the lock claw 33. That is, as shown in FIG.
The three parts are connected to each other so that the tuner bag 28 is sandwiched between them. Both the FM tuner back 28 and the video camera body 10 connected in this way are driven by the battery 20. That is, the battery 20 and the contact bin 34 of the FM tuner back 28 are connected, and
FM tuner pack 28 power line 45.46 (4th
(see figure) is connected to the video camera body through the contact pin 25 on the camera body 10 side. Therefore, both the video camera body 10 and the FM tuner pack 28 are driven by the battery 20. The FM tuner pack 28 is equipped with a Rondo antenna 39 as shown in FIGS. 3 and 4, and the Rondo antenna 39 receives broadcast waves. Then, a broadcast radio wave of a predetermined frequency is selected by the tuner 48, and a level conversion circuit 51 and a variable resistor 55
is supplied to the adder circuit 58 through. If it is desired to include a narration at the same time, the voice is input using the microphone 4O protruding from the side of the FM tuner back 28, as shown in FIG. This audio signal is transferred to the level conversion circuit 5.
2, and is superimposed on the signal from the tuner 48 in an adder circuit 58 via a variable resistor 56. Other audio signals, such as the reproduction output of a CD player, are taken in through the external input jack 50, have their levels converted by the level conversion circuit 53, and are supplied to the addition circuit 59 through the variable resistor 57. This adder circuit 59 superimposes the signal on the signal from the adder circuit 58 and outputs it to the microphone output plug 61 through the level converter circuit 60 . Therefore, by connecting this plug 61 to the microphone input jack on the side of the video camera body 10, it becomes possible to supply a predetermined audio signal to the VTR built in the video camera 10. Such an audio signal is transmitted to the lens barrel 11.
The video captured through the internal optical system is recorded on the magnetic tape in the tape cassette by the VTR built into the video camera. In this way, it becomes possible to easily create a tape with music or a tape with narration. Note that when using the FM tuner pack 28,
When the microphone output plug 61 is connected to the microphone input jack of the video camera body 10, the ground level of the FM tuner back 28 is the level of the ground section 68 provided in the tuner pack 28. . That is, when the plug 61 is connected to the video camera body 10 side, the switch 69 connected to the power supply circuit 47 is opened, and the negative side of the power supply circuit 47 is connected to the grounding part 68. By using the grounding part 68 in this way, the FM tuner pack 28
The ground level of the signal can be set independently of the ground level of the microphone input jack on the video camera body 10 side. Therefore, the circuit inside the FM tuner back 28 is not affected by the impedance or coil component between the power supply line 46 and the microphone input jack of the video camera body 10, thereby making it possible to prevent the generation of noise. As described above, in the video camera according to this embodiment,
An FM tuner bag 28 is provided which is sandwiched between the camera body 10 and the battery 20. As shown in FIG. 3, the FM tuner bag 28 stores its connection cord in a storage section 41. By using such an FM tuner back 28, FM music and narration can be recorded on the magnetic tape in the tape cassette installed in the VTR of the video camera body 10, along with the scenery captured through the optical system. I can do it. Moreover, since the FM tuner back 28 does not have a structure in which it is connected by an accessory shoe, it can be connected with or without an accessory shoe, and can be used commonly with video cameras that use the battery 20 of the same standard. can. Further, this FM tuner pack 28 can also be driven by the battery 20, so that the power source is shared. In addition, the video camera body 10 and the battery 20
In the state shown in Figure 2, F is sandwiched between
Since the M tuner back 28 can be attached, a sense of unity is achieved in terms of design.Furthermore, the back 28 can be stored in the case with it attached, making handling easier. brings about advantages. [Effects of the Invention] As described above, the present invention includes an FM tuner bag which can be detachably attached to the camera body using the battery mounting part and has an FM tuner, and furthermore, the FM tuner bag is equipped with a battery. A removably attachable mounting part is provided, and this FM tuner pack is attached to the battery mounting part of the camera body.
By attaching a battery to the attachment part of the M tuner bag, both the video camera and the FM tuner pack can be driven by the battery. Therefore, with this configuration, the FM tuner pack can be connected even to a video camera that does not have an accessory shoe. Moreover, since the FM tuner back is powered by a battery together with the video camera, there is no need to provide an independent power source for the FM tuner back.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the connection operation of an FM tuner pack according to an embodiment of the present invention, Fig. 2 is an external perspective view showing the connected state, and Fig. 3 is an FM tuner pack with the microphone protruding. FIG. 4 is an external perspective view of the tuner pack and a circuit diagram of the FM tuner pack. The names of the main parts in the drawings are as follows. 10... Cabinet 11... Lens barrel 19... Battery mounting portion 20... Battery 21... Engaging claw 22... Engaging groove 25 ... Contact bin 28 ... FM tuner bag (adapter pack) 30 ... Engagement groove 31 ... Battery mounting section 32 ... Engagement claw 34 ... ... Contact bin 39 ... Rod antenna 40 ... Microphone 45, 46 ... Power line 47 ... Power supply circuit 48 ... Tuner 50 ... External input Jack 54...Mixing circuit 61...Mic output plug

Claims (1)

[Claims] 1. Built-in V that captures images through the optical system
A video camera configured to record on a magnetic tape in a tape cassette using TR, and driven by a battery installed in a battery installation part provided in a part of the cabinet. An FM tuner pack is provided which is removably attached to the camera body by a battery attachment part and has an FM tuner, and the FM tuner pack has an attachment part to which the battery can be detachably attached. A video camera, characterized in that the video camera and the FM tuner pack are both driven by a battery mounted on a mounting portion of the FM tuner pack.