JPH0226022Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device for displaying a tuned frequency in, for example, a vehicle-mounted radio receiver.

In conventional display devices like this, the scale display plate is fixed to the case using screws, etc.
Therefore, the number of parts and the number of manufacturing steps have increased.

An object of the present invention is to provide a display device that can reduce the number of parts and simplify the manufacturing process.

The present invention has a scale display plate having engaging pieces at both ends, and engaging protrusions at both ends that engage with the engaging pieces,
a rear shielding member disposed behind the scale display plate; and a case having a mounting hole on the front surface through which the protrusion is inserted, the engaging protrusion of the rear shielding member protruding from the mounting hole on the front surface of the case. The display device is characterized in that the scale display plate and the rear shielding member are fixed to the case by engaging the engagement piece of the scale display plate with the protruding engagement protrusion.

FIG. 1 is a perspective view of an audio device for an in-vehicle radio receiver according to the present invention, and FIG.
FIG. 2 is a sectional view showing a state in which the device is mounted on the body of an automobile. Brackets 7 and 8 are fixed to the side plates 3 and 4 of the case 2 of the audio device 1 with bolts 5 and 6. These brackets 7, 8 are attached to mounting pieces 10,
It is attached to 11. A decorative board 12 that covers the audio device 1 is attached to the decorative board 9. The front plate 13 of the case 2 has a tuning operation shaft 15 and a volume operation shaft 14.
is protruding forward. A scale display board 16 is fixed to the front plate 13, and a pointer 17 for displaying the tuning frequency in the left-right direction is provided inside the scale display board 16.

FIG. 3 is a simplified exploded perspective view of the vicinity of the front plate 13. The front plate 13 has insertion holes 18 and 19 through which the operating shafts 14 and 15 are inserted and fixed, respectively.
is formed. In correspondence with the longitudinal opening 20 extending in the left-right direction of the front plate 13, a scale display plate 16 on which tuning frequencies are graduated is arranged in front of the front plate 13. Behind the front plate 13 is a rear shielding member 2.
2 is placed.

4 is a front view of the scale display board 16, FIG. 5 is a plan view of the scale display board 16, FIG. 6 is a left side view of the scale display board 16, and FIG. 7 is a cross-section line of FIG. 4.
FIG. This scale display board 16
is made of a transparent light-transmitting synthetic resin material such as acrylic resin. Back surface 16a of scale display board 16
The numerical portion 122 to be displayed is subjected to a satin-like texture consisting of fine irregularities. An inclined surface 23 inclined downward toward the front surface 16b along the left-right longitudinal direction is formed on the upper part of the scale display plate 16. This inclined surface 23 is also textured. The texturing of the numeral portion 122 and the inclined surface 23 is integrally formed when the scale display plate 16 is molded. Behind the scale display board 16 (left side in Fig. 7)
A light source 24 is arranged. The light from this light source is diffusely reflected on the inclined surface 23 and reliably enters the scale display plate 16. In the textured number part 122, the light that has entered the scale display plate 16 is diffusely reflected, so that the characters appear stuck together, and the remaining part remains transparent. Also, when there is no light from the light source, the text appears white due to the texture. In this way, the numeral portion 122 can be clearly seen from the front regardless of the presence or absence of a light source.

As another embodiment of the present invention, the number portion 122 may be formed by texturing on the front surface 16b of the scale display plate 16. Such texturing simplifies the manufacturing process and reduces cost.

The longitudinal direction of the scale display plate 16 (Figs. 4 and 5)
Engagement pieces 25, 26 are provided at both ends (left and right direction in the figure).
are formed respectively. The engagement piece 25 has surfaces 25a, 25b parallel to the back surface 16a and front surface 16b of the scale display plate 16, and an inclined surface 25 that tapers downward continuously from these surfaces 25a, 25b.
c and an upper surface 25d. Another engagement piece 26 is similarly configured.

8 is a front view of the rear shielding member 22, FIG. 9 is a partially cutaway plan view thereof, and FIG. 10 is a front view of the rear shielding member 22.
FIG. 11 is a sectional view taken along the section line XI--XI in FIG. 8. FIG.
The rear shielding member 22, which is housed in the case 2 behind the front plate 13, has a pair of fitting parts 31 arranged in the longitudinal direction (left and right in FIGS. 8 and 9),
32, and a shielding portion 33 extending behind the scale display plate 16 along the longitudinal direction of the scale display plate 16. The fitting portion 31 is provided with a fitting hole 34 extending in the front-back direction of the rear shielding member 22 (vertical direction in FIG. 9). A locking surface 35 is formed at the rear end (the upper end in FIG. 9) of the fitting part 31. Fitting part 31
The front end (lower end in FIG. 9) 36 has a raised portion 37
is a distance d behind. A fitting hole 38 is also formed in the other fitting portion 32 . This fitting part 32 is configured symmetrically with the fitting part 31. The shielding part 33 includes a rear plate 39, a bottom plate 40, and a fitting part 3.
1 and 32, and side plates 41 and 42.

As shown in FIG. 3, support pieces 43,
44 is formed. These support pieces 43 and 44 include
Projections 45 and 46 are formed that project in the longitudinal direction of the opening 20 (in the left-right direction in FIG. 3). Fitting hole 3
Support pieces 43 and 44 are fitted into the holes 4 and 38, respectively.

Referring to FIG. 12, the protrusion 45 formed on the support piece 43 abuts and engages with the rear end 35 of the fitting portion 31. As shown in FIG. In this way, the rear blocking member 22 is prevented from slipping out from the support pieces 43 and 44 to the rear side of the front plate 13.

The rear shielding member 22 is made of a black synthetic resin material, such as ABS resin or polypropylene, so that the protrusion 45 and the rear end 35 of the fitting part 31 are elastically engaged, and the front plate 13 and the rear end are elastically engaged. Shaking with the shielding member 22 is prevented as much as possible. The support piece 44 fitted into the other fitting hole 38 is also engaged in the same manner. The distance d between the front end 36 of the fitting part 31 and the abutting surface 37 is equal to the thickness of the front plate 13, so when the rear shielding member 22 is attached to the front plate 13, the abutting surface 37 is flush with the front surface of the front plate 13 inside the opening 20. The rear surface of the scale display plate 16 comes into contact with this contact surface 37 as described later.

A receiving portion 146 extends continuously from the bottom plate 40 constituting the shielding portion 33 toward the front (to the left in FIG. 10). This receiving portion 146 receives the lower end surface of the scale display plate 16 to prevent light leakage.

As described above, the fitting holes 34 and 38 of the fitting parts 31 and 32 formed in the rear closing member 22 are connected to the case 2.
Support pieces 43 and 44 that protrude rearward are fitted at both ends of the opening 20 in the longitudinal direction, and protrusions 45 that protrude in the longitudinal direction of these support pieces 43 and 44 are fitted to the rear end 35 of the fitting part 31. A projection 46 that is elastically fitted and formed in the same manner on the support piece 44
Also, since the rear shielding member 22 is elastically engaged with the fitting portion 32, attachment of the rear closing member 22 is extremely easy, and the number of parts can be reduced and productivity can be improved.
Further, the protrusion 45 and the rear end 35 of the fitting part 31 are elastically engaged, and the other protrusion 46 and the fitting part 32 are similarly elastically engaged, so that the case 2 This prevents rattling between the rear shielding member 22 and the rear shielding member 22.

In order to fix the scale display plate 16 to the rear shielding member 22 and the case 2, engaging protrusions 51, 52 are formed further outward than the longitudinal fitting parts 31, 32 of the rear shielding member 22. . The protrusion 51 is the first
As is clear from FIG. 3, the front piece 54 includes a side piece 53 extending upward in the longitudinal direction outward side (right side in FIG. 9), a front piece 54 extending upward in the near side, and a bottom piece 55. A fixing protrusion 56 that protrudes rearward is formed at the upper part of the holder. Another engagement protrusion 5
2 is configured symmetrically with the engaging protrusion 51 on the left and right sides.
Attachment holes 57 and 58 are formed in the front plate 13 of the case 2 so that the engagement protrusions 51 and 52 can be inserted through the front plate 13. Engagement protrusions 51, 52
project forward from these mounting holes 57, 58.

By moving the scale display plate 16 downward along the front plate 13 from in front of the front plate 13, the engaging pieces 25, 26 engage with the protrusions 51, 52. The front surface 25a of the engagement piece 25 is in contact with the surface of the front plate 13,
Another surface 25b abuts the inner surface of the front piece 54. The inclined surface 25c allows the engagement piece 25 to fit into the engagement protrusion 51 easily. Fixing protrusion 5
6 comes into contact with the upper surface 25d of the engagement piece 25, thereby preventing the scale display plate 16 from being displaced upward and coming out of the engagement protrusion 51. The engagement piece 26 is engaged with the other engagement protrusion 52 in the same manner.

In this way, the fitting portion 3 of the rear shielding member 22
The support pieces 44 and 45 are fitted to the front plate 1 and 32, and the front plate 1
3, the protrusions 51 and 52 fit into the mounting holes 5 formed in the front plate 13.
This protrusion 5 protrudes forward from 7 and 58.
1 and 52, the engagement pieces 25 and 26 of the scale display plate 16 are engaged with the scale display plate 16, thereby simplifying the mounting structure and the installation work of the scale display plate 16, and eliminating the need for parts necessary for mounting such as screws in the prior art. is omitted, reducing the number of parts.

Fig. 14 is a front view of case 2, Fig. 15 is a plan view of case 2, Fig. 16 is a right side view of case 2, and Fig. 17 is a side view showing the assembly process of case 2. FIG. 18 is a sectional view taken along the cutting plane line - in FIG. 16. This case 2 is formed by punching and pressing a single metal plate. Bottom plate 61
is at the front plate 13 and the linear bending position 68.
Continuous at 90°. Furthermore, a pair of side plates 3 and 4 are provided that stand continuously on the bottom plate 61. Front plate 1
The outer surface of the side plates 3 and 4 (the first
First bending pieces 64 and 65 are provided which bend to the left and right in FIGS. 4 and 15). Further, second bent pieces 66 and 67 are provided continuously on both sides of the front plate 13. The second bent pieces 66, 67 are arranged on the inner surfaces (the mutually opposing surfaces in FIGS. 14 and 15) of the side plates 3, 4. In the side plate 3, a portion 69 where the first bent piece 64 overlaps and abuts the side plate 3,
4 are recessed in the direction of mutual proximity. Natsu 70
has a fitting part 71 and a head 72, and has an internal thread 73.
has. This internal thread 73 has a bracket 7
(See Figure 2) A bolt 5 for attaching is screwed together. The second bent piece 66 has a head 7 of a nut 70.
An insertion hole 74 is formed into which the holder 2 is inserted almost tightly. The side plate 3 is formed with an insertion hole 75 into which the fitting portion 71 of the nut 70 is inserted almost tightly. As is clear from FIG. 18, the surface 72 of the head 72 of the nut 70 on the side of the fitting part 71 is joined to the inner surface 3a of the side plate 3 by welding, and the nut 70 is thus fixed to the side plate 3. .

The case 2 is configured in this way, and in particular, the side plate 3 is sandwiched between the first bent piece 64, the second bent piece 66, and the projecting piece 100, so that the side plate 3 has a thickness direction (first Even if a force (in the left-right direction in FIGS. 14 and 15) is applied, the side plate 3 is prevented from shaking and displacing in the left-right direction. Further, the front end of the side plate 3 is in contact with the vicinity of the root of the first bent piece 64, and the nut 70 fixed to the side plate 3 fits almost tightly into the insertion hole 74 formed in the second bent piece 66. , so the side plate 3 is at the bending position 6.
An angular displacement relative to the front plate 13 around the front plate 8 is reliably prevented. In this way, the rigidity and strength of the case 2 are improved.

FIG. 19 is a sectional view corresponding to FIG. 18 showing another embodiment of the present invention, in which a nut 70a is used in place of the nut 70 described above.

Figure 20 shows one of the audio devices stored in case 2.
It is a front view of the channel selection mechanism 80 which constitutes the
FIG. 1 is a plan view of the channel selection mechanism 80. By rotationally driving the operating shaft 15, the core 82 provided in relation to the coil 81 is inserted and removed, and the holding member 83 is moved to the scale display plate 16 accordingly.
It moves along the longitudinal direction (horizontal direction in FIGS. 20 and 21). The holding member 83 that is pressed also has a plurality of (5 in this embodiment) push buttons 84 that individually correspond to predetermined tuning frequencies.
The core 82 is displaced so as to obtain the corresponding tuning frequency, and the holding member 83 is moved accordingly. The holding member 83 includes a projecting piece 8 that projects upward.
4, and shoulders 85 provided on the left and right at the root of the protruding piece 84. The protruding piece 84 has an engagement hole 8
6 is formed.

FIG. 22 shows the holding member 83 and the holding member 8.
3 is a perspective view of a pointer member 91 attached to FIG.
The pointer member 91 includes a pointer 17 disposed between the scale display plate 16 and the rear plate 39 of the rear shielding member 22 and extending downward, and a mounting portion 93 formed integrally with the pointer 17. Such a pointer member 9
1 is made of synthetic resin material.

FIG. 23 is a plan view of the pointer member 91, and the second
FIG. 4 is a sectional view showing the pointer member 91 attached to the holding member 83. The mounting part 93 includes
A fitting hole 94 is formed that extends vertically. An engagement protrusion 96 that protrudes toward the pointer 17 (to the left in FIGS. 23 and 24) is formed on a rising piece 95 that extends upward from the attachment portion 93. When the protruding piece 84 is fitted into the fitting hole 94, the mounting portion 9
3 is in contact with the shoulder portion 85, and in this state, the engagement protrusion 96 engages with the engagement hole 86.
In this way, the pointer member 91 is attached to the holding member 83.

FIG. 25 is a perspective view of another embodiment of the present invention. In this embodiment, an engaging protrusion 97 that protrudes rearward (to the left in FIG. 25) is formed on the protruding piece 84 formed on the holding member 83. An engagement hole 98 facing the fitting hole 94 is formed in the attachment portion 93 that is integrally formed with the pointer 17 . When the projection piece 84 is fitted into the fitting hole 94 and the lower end 93a of the attachment portion 93 is in contact with the shoulder portion 85, the engagement protrusion 97 is engaged with the engagement hole 98.

According to the embodiment shown in FIGS. 22 to 25, the attachment work of the holding member 83 and the pointer member 91 is simple, and the number of parts is small, so that productivity and workability are improved. become. Moreover, the pointer member 91 can be easily removed from the holding member 83, so that when the pointer member 91 is damaged or when the tuning mechanism 80 is repaired, the holding member 91 can be easily removed.
The pointer member 91 can be easily removed from 3.

As described above, according to the present invention, the chassis requires only simple processing to provide holes, and there is no need to assemble screws, etc., and the chassis is simply sandwiched between the scale display plate and the rear shielding member, and the scale display plate It is a simple task of simply engaging the rear shielding member. Therefore, the number of parts is reduced and the manufacturing process is simplified. Further, since the scale display plate, the rear shielding member, and the chassis are directly connected to each other, positioning accuracy is increased. Moreover, the design looks good and the aesthetic appearance is improved.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention, FIG. 2 is a horizontal sectional view showing the mounting structure of the case 2,
3 is a simplified exploded perspective view of the front plate 13, scale display plate 16, and rear shielding member 22 of the case 2, FIG. 4 is a front view of the scale display plate 16, and FIG. 5 is a simplified exploded perspective view of the scale display plate 16. 6 is a right side view of the scale display plate 16, FIG. 7 is a sectional view taken from the cutting plane line - in FIG. 4, and FIG. 8 is a front view of the rear shielding member 22.
9 is a partially cutaway plan view of the rear shielding member 22, FIG. 10 is a cross-sectional view taken along the section line - in FIG. 8, and FIG. 11 is a section view taken along the section line XI-- in FIG. XI
12 is a partial sectional view showing the attachment structure between the rear shielding member 22 and the front plate 13 of the case 2, and FIG. 13 is a sectional view showing the engagement protrusion formed on the rear shielding member 22. 14 is a front view of case 2, FIG. 15 is a plan view of case 2, and FIG. 16 is a right side view of case 2. , FIG. 17 is a side view showing the manufacturing process of case 2, FIG. 18 is a sectional view taken from the cutting plane line - in FIG. 16, and FIG. 19 corresponds to FIG. 18 of another embodiment of the present invention. FIG. 20 is a front view showing the channel selection mechanism 80;
FIG. 21 is a plan view of the channel selection mechanism 80, FIG. 22 is an exploded perspective view of the holding member 83 and the pointer member 91, and FIG.
3 is a plan view of the pointer member 91, FIG. 24 is a vertical sectional view showing the pointer member 91 attached to the holding member 83, and FIG. 25 is a partial view of the holding member 83 of another embodiment of the present invention. 9 is an exploded perspective view showing a pointer member 91. FIG. 1...Sound device, 2...Case, 3, 4...Side plate, 5, 6...Bolt, 7, 8...Bracket,
13...Front plate, 16...Scale display board, 17...Pointer, 22...Rear shielding member, 25, 26...Engaging piece, 31, 32...Fitting part, 34, 38...Fitting Matching hole, 43, 44... Support piece, 45, 46... Engagement protrusion, 51, 52... Engagement protrusion, 57, 58...
...Mounting hole, 64, 65...First bent piece, 66,
67...Second bent piece, 70...Nut, 74...
Insertion hole, 80... Tuning mechanism, 83... Holding member,
84... Projection piece, 85... Shoulder part, 86... Engagement hole,
91...Pointer member, 93...Mounting part, 94...
Fitting hole, 96...engaging protrusion.

Claims (1)

[Claims for Utility Model Registration] A scale display plate having engaging pieces at both ends, and engaging protrusions at both ends that engage with the engaging pieces,
a rear shielding member disposed behind the scale display plate; and a case having a mounting hole on the front surface through which the protrusion is inserted, the engaging protrusion of the rear shielding member protruding from the mounting hole on the front surface of the case. A display device characterized in that the scale display plate and the rear shielding member are fixed to the case by engaging the engagement piece of the scale display plate with the protruding engagement protrusion.