JPH0730269A - Frame structure of self-supporting device - Google Patents

Abstract

(57) [Abstract] [Purpose] In the frame of a self-supporting electronic device, it is possible to simplify the constituent members, reduce the number of members and the welding process,
To obtain a structure that can significantly reduce costs. A first and second plate members 2 and 12 which are joined to each other at right angles to each other are provided, and a plurality of cuts protruding toward the second plate member 12 are provided at a plurality of positions on the surface of the first plate member 2. The fitting piece 7 that fits with the plate thickness of the second plate member 12 is formed by the raised piece 6, and the joint position accuracy of the second plate member 12 is cut and raised to be defined by the position accuracy of the piece 6. The cut-and-raised piece 6 is bent in a chevron shape,
The fitting portion 7 is cut and raised so that it extends toward the protruding side of the piece 6. By refracting the first plate member 2 so as to surround at least three sides of the second plate member 12 and forming the fitting portions 7 on the opposing surfaces, a structure in which the first plate member 2 is self-held in a temporarily assembled state can be obtained. . Further, by providing the bent fastening piece 15 on the joining side of the second plate member 12, the first and second plate members 2 and 12 can be riveted together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of an electronic device, and more particularly to a frame structure adopted in a self-supporting electronic device belonging to office equipment.

[0002]

2. Description of the Related Art Generally, an electronic apparatus belonging to office equipment has a structure in which a frame made of sheet metal accommodates an internal unit such as a printed wiring board and a disk drive unit, and a decorative panel is attached to the outside. The printed wiring board is usually inserted into and removed from a support frame usually called a shelf, and is electrically connected to a backboard (wiring board) provided at the back end of the shelf via a connector. In addition, the case and other conductive members of the mounted internal unit must be grounded to the frame (frame ground). Therefore, a contact spring for the frame ground is fixed to the frame. In addition, self-supporting electronic devices are often narrow in shape for space-saving design, and such devices are provided with auxiliary legs for preventing fall that project to both sides of the bottom of the frame to prevent falling. .

FIG. 10 shows a main body of an office computer as an example of such a self-supporting electronic device, and 33 is an auxiliary foot. FIG. 11 shows a conventional frame structure of the electronic device of FIG. 10, the right side of the drawing is the front of the device. In the illustrated apparatus, a flexible disk drive device, a magneto-optical disk drive device, etc. are accommodated in a space 42 in the upper front part of the frame 41, and a hard disk drive device is accommodated in a space 43 in the upper rear part.
Further, a shelf of a printed wiring board is mounted in the space 44 in the lower front so that the printed wiring board can be inserted and removed from the front side of the apparatus, and a space 45 in the lower rear is a narrow vertical partition plate 2.
In FIG. 3, it is divided into the front side and the back side in the figure, and the power supply unit is housed in the back side and the uninterruptible power supply is housed in the front side. The upper space and the lower space are partitioned by an upper partition plate 8, a wiring space is provided below the lower space, and the lower space and the wiring space are partitioned by a lower partition plate 9. An upper frame 47 is fixed to the upper end of the frame, and a bottom plate 34 is fixed to the lower end.

The dimensions of the spaces 42 to 45 into which the power supply unit, the device unit, the printed wiring board, etc. are inserted are important, and a dimensional tolerance of about plus or minus 0.2 mm is required. Moreover, the external dimensions of these internal units are not necessarily the same. As a result, these internal unit loading portions of the frame include positioning plates 10, 11
A side guide plate 48 is provided to form a space matching the size of the internal unit to be loaded, and
A jig is used to regulate the relative positional relationship between the upper and lower partition plates 8 and 9, the positioning plates 10 and 11, the vertical partition plate 23, and the side guide plate 48, and spot welding is performed to form an internal unit accommodating space having an accurate size. I was trying to do it.

Further, the frame ground between the frame 41 and the internal unit is necessary in order to suppress radio waves radiated from the internal unit. For example, in the frame shown in FIG. 12, a frame ground contact 24 is provided on the vertical partition plate 23. There is. This frame ground contact is formed by a leaf spring 49 whose front end is bent in a V shape. Conventionally, as shown in FIG. 12, the base end of the leaf spring 49 is welded to the vertical partition plate 23 by spot welding. Was. In this case, vertical partition plate 2
Since the plate thicknesses of 3 and the plate spring 49 are different, the contact plate 50 is provided and spot welding is performed. The auxiliary foot 33 is shown in FIG.
As shown in, the bracket 51 having a complicatedly bent shape is spot-welded to the lower portions of both sides of the bottom plate 34, and the base end of the auxiliary foot 33 is fixed to the bracket 51.

[0006]

As described above, the frame 41 of the self-supporting device is required to have a structure satisfying various functions, and is therefore composed of a large number of members. Further, when assembling the plate members, the dimensional accuracy of each plate member is required. Therefore, it is necessary to perform an operation requiring skill to perform spot welding after positioning the plate members using a jig. Further, since the frame weight is large, there is a problem that the spot welding work performed by changing the posture of the frame for each welding location requires heavy labor, and the frame becomes expensive due to these factors. That is, in the conventional structure, the frame is composed of a large number of plate members, and most of these plate members are fixed by spot welding, which requires a lot of man-hours for assembling and places a great burden on the operator in terms of maintaining accuracy. Was there.

For example, in the shelf structure portion into which the printed wiring board is inserted, the number of members is large and the assembling work is complicated, and the welding position accuracy of the upper and lower positioning plates 10 and 11 is maintained in order to maintain the guiding accuracy of the printed wiring board. It was necessary to put it out accurately, and it was a considerable cost burden. In addition, for example, in the mounting structure of the leaf spring 49 for the frame ground contact, since the plate thickness of the leaf spring 49 and the plate member 23 is considerably large, skill is required for welding work, and the spot plate 5 for spot welding is used.
0 is used, which has been a factor in increasing costs.
Further, the work of spot-welding a small leaf spring 49 to a large frame has been a difficult work that requires concentration. In addition, for example, in the attachment part of the auxiliary foot, it is necessary to support the device weight of about 60 kg in order to prevent the fall.
Since the bracket 51 may be spot welded off or deformed, the bracket 51 has a complicated bent shape in order to have sufficient strength. Furthermore, the attachment is spot welded and then reinforced by arc welding to ensure the strength. And
Welding work took a very long time.

According to the present invention, in the frame of the self-supporting electronic device, the number of members is reduced and spot welding, which is difficult and heavy labor for assembling, is eliminated by simplifying the structural members and reviewing the positioning structure of the shelf. However, it is an object of the present invention to provide a frame structure that is not affected by the skill level of an operator and can be automatically assembled by a robot or the like, and can significantly reduce the cost as compared with the conventional structure.

[0009]

The frame structure of the self-supporting device according to the present invention has a first structure in which the frame structures are joined to each other in a direction perpendicular to the plane.
In the frame structure of the self-supporting device including the second plate members 2 and 12, a plurality of cut-and-raised pieces 6 projecting toward the second plate member 12 are provided at a plurality of positions on the surface of the first plate member 2. The fitting portion 7 is formed, and the accuracy of the joining position of the second plate member 12 to the first plate member 2 is defined by the position accuracy of the cut-and-raised piece 6. The cut-and-raised piece 6 that forms the fitting portion 7 may be bent in a chevron shape formed between two cuts 13 and 13 that are parallel to the surface of the second plate member 12. The fitting portion 7 can be formed so as to spread in the direction perpendicular to the surface of the second plate member 12 toward the protruding side of the cut and raised piece 6. The first plate member 2 can be bent so as to surround at least three sides of the second plate member 12, and the fitting portion 7 can be formed on the facing surface. The second plate member 12 has a fastening piece 15 parallel to the joint surface of the first plate member 2 on the joint side, and the first plate member and the second plate member 2 positioned by the fitting portion 7 The rivets 19 may be used to fasten and fix the rivets 12.

Further, in the frame structure of the self-supporting device according to the present invention, the internal unit 30 is provided on the outer surface of the plate member 20 having a surface facing the outer surface of the internal unit 30 to be loaded.
A cut-and-raised piece 22 bent in a chevron shape is formed between two cuts 22a, 22a parallel to the insertion / removal direction to project toward the internal unit 30 side. It is defined by the contact between the outer surface of the unit and the protruding end of the cut and raised piece 22.

Further, in the frame structure of the self-standing apparatus according to the present invention, the case of the internal unit 30 and the plate member 23 are electrically connected to the plate member 23 facing the outer surface of the mounted internal unit 30. In a frame structure of a self-standing device provided with a frame ground contact, the plate member 23 has a trapezoidal cut-and-raised shape that projects to a side opposite to a rectangular opening 25 and one side of the rectangular opening 25 and the opposite side of the loading space of the internal unit 30. The frame ground contact is formed by the dogleg-shaped bent portion 26 on the tip end side of the contact spring 27, and the cut-and-raised piece 26 and the cut-and-raised piece 26 are provided at the base end of the contact spring 27. A tongue piece 28 that is inserted into a gap between the plate member 23 and a locking projection 29 that engages with the cut-and-raised piece 26 are provided, and the contact spring 27 has a base end at the plate member 23. The anti-inside uni Is engaged with the surface of the up side, and is characterized in that the contact case and pressing the internal unit 30 by its elasticity to the surface 31 of the inner unit side while abutting the plate member 23 to the tip.

Further, the frame structure of the self-supporting device according to the present invention is the frame structure of the self-supporting device having auxiliary feet 33 projecting to both sides of the frame at the bottom of the frame, the auxiliary feet 33 of the bottom plate 34 of the frame. It is characterized in that the base end is fixed to the brackets 36 projecting downward on both sides and the rectangular reinforcing frames 37 for connecting and fixing the brackets 36 on both sides are fixed. To do.

[0013]

The upper and lower partition plates 8 and 9 and the upper and lower positioning plates 10 and 11 orthogonal to the first plate member 2 forming the vertical wall surface of the frame.
The second plate member 12 such as is positioned by fitting the plate thickness F into the fitting portion 7 between the cut-and-raised pieces 6 formed in the first plate member 2. By forming the cut-and-raised pieces 6 with an NC turret press, the positional accuracy of the plate member 12 can be guaranteed with a tolerance of about 0.15 mm in plasma mass. As a result, the plate members can be positioned relative to each other without using a jig.

The cut-and-raised piece 6 is a chevron-shaped cut-and-raised piece formed between the cuts 13 and 13 parallel to the surface of the second plate member 12, and is fitted with the second plate member 12. The positional accuracy of the portions can be made accurate, and the fitting portion 7 is cut and raised to have a shape that spreads to the projecting end of the piece 6, which facilitates the assembly work at the time of fitting.

In the above structure, the first plate member 2 has a shape in which the front plate 5 and the rear plate 3 of the illustrated embodiment are integrated to form a facing surface, and the fitting portion 7 is formed on the facing surface. By doing so, the second plate member 12 can be self-held by fitting the second plate member 12 into the fitting portion 7 on the opposite surface, and the frame 1 can be temporarily assembled. If the plate members positioned by the temporary assembly are fastened and fixed by the rivets 19, difficult spot welding becomes unnecessary, the assembling time can be shortened, and the automatic assembly by the robot can be realized. In the conventional structure, the positional accuracy of the first plate member and the second plate member cannot be accurately guaranteed by fixing with the rivet due to the dimensional tolerance between the rivet and the rivet hole, but in the structure of the present invention, the cut-raising occurs. The first plate member 2 with the piece 6
Since the positional relationship between the second plate member 12 and the second plate member 12 is guaranteed, the rivet can be assembled. The cut-and-raised piece 6 is intended for positioning the plate members relative to each other, and a similar cut-and-raised piece 22 is formed on the side surface of the loading space of the internal unit so that the internal-unit positioning function can be provided. Then, the side guide plate 48 can be eliminated by using it instead of the side guide plate 48, and the number of members can be reduced.

Further, in the frame according to the present invention, a trapezoidal cut-and-raised piece 26 is provided on the frame, and the tongue piece 28 is inserted while the engaging portion 29 is flexed in the gap created by the cut-and-raised piece to engage the frame. The part 29 is elastically returned to be cut and raised, and is caught between the pieces 26, whereby the contact spring 27 is fixed to the frame 1 in a state where the contact spring 27 is prevented from falling off. When the internal unit is mounted in this state, as shown in FIG. 8, X, Y, Z
At each point, the contact between the frame and the contact spring is surely guaranteed. By adopting the configuration of the present invention in this way, the contact spring can be attached to the frame with one touch,
It eliminates the need for troublesome spot welding work that requires skill.

Also in the structure of the mounting portion of the auxiliary foot 33, the reinforcing frame 37 of the frame structure is fixed between the brackets 36 formed by bending both ends of the bottom plate, and the left and right brackets 36,
By connecting 36, the load related to the auxiliary foot is dispersed, the bracket 51 as a separate component is not required, and the number of members can be reduced. According to the above structure,
Sufficient strength is guaranteed only by spot welding the bracket 36 and the reinforcing frame 37, and the number of welding steps can be reduced.

[0018]

EXAMPLE An example shown in the drawings will be described below. The first plate member 2 forming the standing wall surface of the frame 1 is formed by bending one plate as shown in FIG.
A side plate 4 and a front plate 5 that bends from this side plate in a short length are integrally formed, and a plurality of cut-and-raised pieces 6 projecting inward of the frame are formed at appropriate positions on the plate 3, side plate 4, and front plate 5. The fitting portion 7 is formed. As shown in FIG. 3, each fitting portion 7 has a plate thickness F of the second plate member 12 (upper and lower partition plates 8 and 9 and upper and lower positioning plates 10 and 11) to be positioned.
Is provided with an interval E for fitting. The fitting portion 7 is formed between three cut-and-raised pieces 6 arranged in a staggered manner, and each cut-and-raised piece 6 is formed between the cut lines 13, 13 parallel to the surface of the second plate member 12. It is formed by cutting and raising the plate portion into a chevron shape (see FIG. 2). By making the width L of the protruding end of each cutting and raising piece 6 slightly narrower than the width D of the base end, the cutting and raising piece 6 is formed. The fitting portion 7 is formed so as to spread in the plate thickness direction toward the protruding end side.

The four sides of the second plate member 12 are the first plate member 2
Bending with a short length so that it is parallel to the surface of
5 is formed, and a rectangular opening 16 is provided in a portion of the fastening piece 15 that faces the cut-and-raised piece 6. As shown in FIG. 3, the second plate member 12 has an end piece whose plate thickness is equal to that of the fitting portion 7.
Is positioned in the state of being fitted to the
The cut-and-raised piece 6 on the side is inserted into the opening 16.

The joint position of the first plate member 2 and the second plate member 12 is positioned by fitting the plate thickness F of the second plate member 12 between the cut and raised pieces 6 arranged in a staggered manner. Is
If the cut-and-raised piece 6 is formed by an NC turret press, the upper and lower partition plates 8 and 9 and the upper and lower positioning plates 10 and 11 have a tolerance (plus or minus 0.15 mm) peculiar to the press.
The mutual distance can be guaranteed with accuracy (see FIG. 5).
Then, the fitting portions 7 are provided on the opposing surfaces of the first plate member 2 bent in a U shape as shown in FIG.
If the upper and lower partition plates 8 and 9 are positioned,
By simply fitting the above into the fitting portion 7, the upper and lower partition plates 8 and 9 are held by the first plate member 2 and temporarily assembled. Therefore, as shown in FIG. 4, rivet holes 17 and 1 are formed in the first plate member 2 and the fastening piece 15 of the second plate member.
8 is provided and the temporarily assembled first plate member and second plate member are fastened and fixed by the rivet 19, so that both can be fastened. In this case rivet holes 17, 1
8 is one diameter J, and the dimension G from the bent portion of the fastening piece 15 to the rivet hole (usually plus or minus 0.25 to 0.35
mm error occurs), if it is made large enough to absorb the dimensional tolerance of
First plate member 2 and second plate member 1 by riveting
2 can be joined with high positional accuracy.

5 and 6, in addition to the above-mentioned cut-and-raised piece 6 for positioning the upper and lower partition plates 8 and 9, the inner plate (power source) to be housed in the back plate 20 of the power-source storage space 21 portion. A cut-and-raised piece 22 is provided for guiding the outer side surface of the unit). The cut-and-raised piece 22 for this guide has two cuts 22 parallel to the insertion / removal direction of the internal unit 30.
a and 22a are provided and provided in approximately the same shape by the same process as the above-mentioned cut-and-raised piece 6, but the projecting height H from the plate surface of the cut-and-raised piece 6 depends on the width of the internal unit 30 and the width of the frame. The height corresponding to the difference is set so that the internal unit housed in the space 21 abuts on the protruding end of the cut-and-raised piece 22 and is housed without play. Such a cut and raised piece 22
By providing the above, the side guide plate 48 shown in the conventional structure of FIG. 11 is unnecessary, the number of members can be reduced, and the number of steps for assembling the members is also reduced.

The frame ground contact 24 mounted on the vertical partition plate 23 is mounted in the structure shown in FIGS. 7 and 8. That is, the vertical partition plate 23 is provided with a rectangular window 25 for mounting a contact spring, and two sets of trapezoidal cut-and-raised pieces 26, 26 are provided in close proximity to one side of the window 25. On the other hand, the contact spring 27 is formed by bending a bent portion 32, which comes into contact with the case of the internal unit 30 to be loaded, into a dogleg shape in the same manner as in the conventional case, and the surfaces of the cut-and-raised piece 26 and the vertical partition plate 23 at the base end thereof. A tongue piece 28 to be inserted into a slit formed between and is formed, and a part of the tongue piece is cut and raised to form a locking projection 29. Contact spring 27 formed in this way
Passes the window 25 from the inner unit loading side of the vertical partition plate 23 to the back side and cuts and raises the tongue piece 28 to form a slit formed between the piece 26 and the surface of the vertical partition plate 23. Insert it. Then, at the position between the two cut and raised pieces arranged side by side, the locking projection 2
The tongue piece 28 is inserted until 9 is restored by its own spring force, and the attachment is completed. At this time, the size of the window 25 is set so that the front end of the contact spring 27 faces the surface 31 of the vertical partition plate 23 on the internal unit loading side. In this state, the contact spring 27 is retained by being inserted into the trapezoidal cut-and-raised piece 26 by the retaining action of the locking projection 29. When the internal unit 30 is loaded into the frame, as shown in FIG.
The internal unit 30 and the contact spring 27, and the bent portion 3 having a V-shape.
2, the vertical partition plate 23 and the contact spring 27 contact the vertical partition plate 23 at the base end portion X and the tip end portion Z, and electrical contact between the internal unit 30 and the frame can be secured.
In this way, the contact spring 27 can be attached to the frame by one operation, and the troublesome and skilled fixing work of the contact spring by spot welding becomes unnecessary.

In the frame of the illustrated embodiment, the auxiliary foot 33
The mounting portion has a structure shown in FIG. That is, a plate piece 35 integral with the bottom plate 34 is provided at the base of the auxiliary foot 33 of the bottom plate 34, and the plate piece 35 is bent once inward and then bent further downward to form the bracket 36. Then, both ends of the left and right brackets 36, 36 are integrated by spot welding both ends in a state where a reinforcing frame 37 formed in a rectangular frame shape is fitted between the opposing brackets 36, 36. Then, the base end of the auxiliary foot 33 is fixed to the outer side portion of each bracket 36.

A large load is not applied to the auxiliary feet 33 for preventing the fall of the auxiliary feet 33 on both sides at the same time. Then, the load applied to one auxiliary foot is distributed and taken up by the two brackets connected by the reinforcing frame 37, so that a sufficient strength can be obtained with a simple structure and the welding operation becomes easy.

[0025]

According to the present invention described above, in the frame of the self-supporting electronic device, the pad used for welding the guide plate for guiding the members and the internal unit for the mutual positioning of the members and the frame ground contact. It is possible to eliminate auxiliary members such as plates. Further, in terms of assemblability, the work of joining and positioning the plate members to each other becomes very easy, and at the same time, the main members can be self-held in a temporarily assembled state in which they are positioned to each other, which is a difficult and heavy labor as a fixing means. Instead of spot welding, a fixing structure by riveting can be adopted, and the work load during assembly can be greatly reduced. Moreover, the accuracy of the joining position of each member does not depend on the skill of the operator, and automatic assembly by a robot can be easily performed. As a result, the cost of the frame can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a joint structure between plate members.

FIG. 2 is a partial plan view and a side view showing the shape of a cut and raised piece.

FIG. 3 is a detailed perspective view showing a joint structure of plate members.

FIG. 4 is a sectional side view showing a joint structure of plate members.

FIG. 5 is an overall perspective view of a frame

FIG. 6 is a partial perspective view showing a guide structure using cut-and-raised pieces.

FIG. 7 is a perspective view illustrating a mounting structure of a frame ground contact.

FIG. 8 is a partial sectional plan view showing a mounting structure of a frame ground contact.

FIG. 9 is a perspective view showing a structure of a mounting portion of an auxiliary foot.

FIG. 10 is a perspective view showing an example of an external appearance of a self-supporting electronic device.

FIG. 11 is an overall perspective view showing a conventional frame structure.

FIG. 12 is a sectional plan view showing a conventional frame ground contact mounting structure.

FIG. 13 is a perspective view showing a conventional structure of an auxiliary foot attachment portion.

[Explanation of symbols]

 2 1st plate member 6 Cut-and-raised piece 7 Fitting part 12 Second plate member 13 Cut 15 Fastening piece 19 Rivet 20 Inner plate 22 Cut-and-raised piece 22a Cut 23 Vertical partition plate 26 Cut-and-raised piece 27 Contact spring 28 Tongue piece 29 Locking protrusion 30 Internal unit 31 Internal unit Device side surface 32 Bent portion 33 Auxiliary foot 34 Bottom plate 36 Bracket 37 Reinforcing frame

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shinya Tachi, Unoke-nu, Hebei-gun, Ishikawa Prefecture 2 No. 98, Unoke-nu PIE Co., Ltd. (72) Inventor Takeshi Unta Uno-nu, Unoku-cho, Hebei-gun, Ishikawa Prefecture No. 98 2 PF Corporation

Claims (8)

[Claims] 1. A frame structure of a self-supporting device comprising first and second plate members (2, 12) joined to each other at right angles to each other at a plurality of positions on the surface of the first plate member (2). Has a fitting portion (7) formed by a plurality of cut-and-raised pieces (6) protruding toward the second plate member (12) side, and the first plate member (of the second plate member (12) ( 2)
The frame structure of the self-supporting device, wherein the accuracy of the joining position with respect to is defined by the position accuracy of the cut and raised piece (6). 2. A cut-and-raised piece (6) forming a fitting portion (7) is formed between two cuts (13, 13) parallel to the surface of the second plate member (12). The frame structure of the self-supporting device according to claim 1, which is a cut-and-raised piece bent in a chevron shape. 3. The fitting part (7) is formed so as to spread in a direction perpendicular to the plane of the second plate member (12) toward the protruding side of the cut and raised piece (6). The frame structure of the self-supporting device according to 1 or 2. 4. The first plate member (2) is bent so as to surround at least three sides of the second plate member (12), and a fitting portion (7) is formed on the opposing surface. The frame structure of the self-supporting device according to claim 1, 2 or 3, characterized in that. 5. The second plate member (12) has a fastening piece (15) on the joint side parallel to the joint surface of the first plate member (2), and has a fitting portion (7).
The first plate member and the second plate member (2,1
The frame structure of the self-supporting device according to claim 1, 2, 3 or 4, wherein 2) is fastened and fixed by rivets (19). 6. Two notches (22a) parallel to the inserting / removing direction of the internal unit (30) are formed on the outer surface of the plate member (20) having a surface facing the outer surface of the internal unit (30) to be loaded. , 22a), a cut-and-raised piece (22) bent in a mountain shape is formed to project toward the internal unit (30) side, and the loading position of the internal unit (30) is A frame structure for a self-supporting device, characterized in that it is defined by abutment of the cut-and-raised pieces (22) with the tips. 7. A plate member (23) facing the outer surface of the mounted internal unit (30) is provided with a frame ground contact electrically connecting the case of the internal unit (30) and the plate member (23). In the frame structure of the self-supporting device provided, the plate member (23) has a rectangular opening (25) and a trapezoidal shape that is adjacent to one side of the rectangular opening (25) and projects to the opposite side of the loading space of the internal unit (30). The cut-and-raised piece (26) is provided, and the frame ground contact is formed by the V-shaped bent portion (26) on the tip side of the contact spring (27) and the base end of this contact spring (27). Includes a tongue piece (28) inserted into a gap between the cut and raised piece (26) and the plate member (23), and a locking projection (29) that engages with the cut and raised piece (26). )
The contact spring (27) has its base end engaged with the surface of the plate member (23) on the side opposite to the internal unit, and its tip at the surface of the plate member (23) on the side of the internal unit. A frame structure for a self-supporting device, wherein the frame structure presses and contacts the case of the internal unit (30) due to its elasticity while being in contact with (31). 8. In the frame structure of a self-supporting device having auxiliary feet (33) projecting to both sides of the bottom of the frame, the auxiliary feet (33) are directed downward on both sides of the bottom plate (34) of the frame. It is characterized in that the base end is fixed to the protruding bracket (36), and that a rectangular reinforcing frame (37) for connecting and fixing the brackets (36, 36) on both sides is fixed. The frame structure of the self-supporting device.