CN105127325B - High-strength radiator main leaf adopting rapid occlusion structure - Google Patents
High-strength radiator main leaf adopting rapid occlusion structure Download PDFInfo
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- CN105127325B CN105127325B CN201510628767.3A CN201510628767A CN105127325B CN 105127325 B CN105127325 B CN 105127325B CN 201510628767 A CN201510628767 A CN 201510628767A CN 105127325 B CN105127325 B CN 105127325B
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Abstract
The invention discloses a high-strength radiator main leaf adopting a rapid occlusion structure. The radiator main leaf comprises a main leaf surface and occlusion walls; grooves are formed between the main leaf surface and the occlusion walls, and used for accommodating a water chamber; transverse notches are formed in the vertical occlusion walls at equal intervals; lug bosses which outwards protrude in the horizontal direction are formed in the circumferential wall of the water chamber, and correspond to the transverse notches; the lug bosses and the transverse notches in the radiator main leaf are transversely staggered at equal intervals, so that when the radiator main leaf is occluded with the circumferential wall of the water chamber, vertical walls above the transverse notches in the occlusion walls of the radiator main leaf are inwards squeezed to be matched with a wall surface between the water chamber and the lug bosses, and vertical walls among the transverse notches, excluding the transverse notches, are matched with the water chamber and the lug bosses to form a sealed space. The welding strength of the radiator main leaf and a radiating pipe can be improved; meanwhile, single-sided tooth occlusion of the radiator main leaf can be achieved at a time, and the radiator main leaf with a certain core width can be occluded with the water chamber through the same seam occlusion machine, so that the work efficiency is greatly improved.
Description
Technical field
The present invention relates to car radiator technical field, be specifically related to a kind of main slice of radiator being connected with hydroecium.
Background technology
Radiator is generally made up of core body and two parts of hydroecium, and core body is main functional parts, and its key component comprises the fundamental parts such as radiating tube, heat-radiation belt, main leaf, baffle plate.Main slice of radiator is connected with hydroecium that typically to use undercut design, undercut be an indispensable part during radiator assembling, plays an important role the sealing of radiator.Typically between main leaf and hydroecium, occlusion structure is: as shown in figure 20, main leaf 1 is upwards vertically arranged with bound edge in a circle, hydroecium 7 is vertically arranged with downwards the outer bound edge of a circle, in main leaf, bound edge places sealing gasket 8, bound edge outer with hydroecium is combined again, being engaged with hydroecium by the biting teeth bending on main leaf bound edge, reach the effect sealed, after occlusion, in main leaf, the top biting teeth bending of bound edge is unilateral with main leaf parallel.This attaching type is engaged, it is generally required to twice undercut action, the undercut machine single occlusion number of teeth is limited, causes undercut work efficiency low；Different radiator core width must use different undercut machine occlusion, and core width size category is too much, causes again undercut machine to put into excessive.
On the other hand, as shown in figure 20, the grid position, hole of main leaf 1 is welded with radiating tube 6 respectively, and the hole wall that thickness is main leaf 1 that welding forms welded bands 3 is thick；Operationally, owing to the condition such as vibrated, pressure, temperature affects, main leaf 1 is likely to be due to fix insufficient strength between radiating tube and failure mode occurs radiator, makes radiator cannot meet functional requirement.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of main slice of radiator with snap engagement structure, in the case of not shadow radiator assembles, main slice of radiator is engaged position and uses new construction with hydroecium, reaches to improve undercut work efficiency, the purpose of heat radiation device reliability；
Simultaneously, the present invention is on the basis of solving above-mentioned technical problem, in the case of not affecting welding manner and not changing main leaf material composition, by changing the unilateral structure of existing main leaf, improve main leaf intensity, reducing main slice of radiator insufficient strength causes main leaf to deform the probability of happening even torn, it is ensured that the reliability of radiator.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of high-strength radiator main leaf with snap engagement structure, the occlusion wall for containing hydroecium circumference wall that is unilateral including main leaf and that enclose in the unilateral surrounding of main leaf, occlusion wall and the unilateral junction of main leaf arrange the groove of containing hydroecium；Can accommodate, unilateral arrange along longitudinal uniform intervals of main leaf, the strip hole that heat radiating tube of heat radiator passes through, the long edge horizontal cross of strip hole is arranged, and radiating tube is by this strip hole and fixing with the hole wall of this strip hole is connected, it is characterised in that:
Unilateral the raising up relative to described groove of main leaf forms described strip hole platform, arrange on this strip hole platform relative to this strip hole platform concave downward or arch upward and perpendicular extend arch hole wall band so that whole hole wall band all contact with each radiating tube fix；
Described occlusion wall is the straight wall of vertical direction, on this occlusion wall, spaced set has the horizontal gap of preseting length, described horizontal gap is positioned at same vertical height and becomes a horizontal linear distribution on each occlusion wall so that all horizontal gap surround a rectangle along occlusion wall circumference；The boss simultaneously horizontally outward protruded with the described corresponding spaced set of horizontal gap on hydroecium circumference wall, described boss the most equidistantly staggers with the horizontal gap on main slice of radiator, make when described main slice of radiator is engaged with hydroecium circumference wall, the wall that straight wall on the main slice of radiator occlusion horizontal gap of wall is extruded inward between hydroecium boss fits, and laterally straight wall without horizontal opening position fits with hydroecium boss between gap, form sealing.
In technique scheme, the described boss bottom of hydroecium circumference wall is vertical wall, between this vertical wall lower end and groove, periphery gasket is set, when described main slice of radiator occlusion wall is engaged with hydroecium circumference wall, straight wall under the occlusion horizontal gap of wall keeps vertically, and sealing gasket is interposed in this vertical wall and groove bottom land and be engaged between the straight wall under the horizontal gap of wall formation sealing.
In technique scheme, the described horizontal gap on occlusion wall is vertically positioned at position, upper middle on occlusion wall.
In technique scheme, described horizontal gap is rectangle at occlusion wall upper section, and long edge horizontal cross is arranged, and minor face vertically has preseting length.
In technique scheme, the hole wall between adjacent two strip holes connects the upper plane of band and arranges less than described hole wall band upper limb, and lower plane is concordant with described hole wall band lower edge so that it is round and smooth domatic with the described longitudinally connected formation of hole wall band that described hole wall connects band.
In technique scheme, the unilateral center line longitudinal along level of main leaf is by described arch hole wall band；Described arch hole wall band upper limb is less than the bottom surface of hydroecium.
In technique scheme, described arch hole wall band upper limb and face, lower edge place are plane, and these two planes form step arch face less than described strip hole platform place plane.
In technique scheme, described arch hole wall band upper limb and face, lower edge place are cambered surface, and this cambered surface is positioned at the position of longitudinal midline relative to described strip hole platform place planar recess.
In technique scheme, described arch hole wall band upper limb and face, lower edge place are plane, are correspondingly arranged multiple evenly spaced vertical circular arc upper dome in upper plane and lower plane；Connecting at described hole wall accordingly and be correspondingly arranged protruding circular arc vault on band, the circular arc vault of this correspondence is protruding upward connects band place plane in described hole wall so that it is round and smooth domatic along longitudinally connected formation with described circular arc vault that described hole wall connects band.
In technique scheme, described arch hole wall band upper limb and the wave line style bending vault face that lower edge place plane is that extension trend is consistent, corresponding described hole wall connects band and also bends vault for wave line style, making described hole wall connect band round and smooth domatic with the bending arch longitudinally connected formation of hole wall band of described wave line style, the wave line style bending vault face of described arch hole wall band is symmetrical relative to bobbin centered by described longitudinal midline.
Thus, the present invention is by improving main leaf tooth and the structure of hydroecium, and the biting teeth bending on main leaf changes straight plate into, equidistantly opens the gap of certain length, simultaneously spaced set boss on hydroecium, and equidistantly staggers with the gap on main leaf；When main leaf is engaged with hydroecium, the straight plate on gap is extruded by undercut machine, until the upper straight-plate of gap is fitted with hydroecium wall, fits with hydroecium boss without the straight plate of opening position, is formed and seal.In this technical scheme, the straight plate on main leaf and hydroecium boss and wall laminating, hydroecium is formed the location in tri-directions of X, Y, Z, increases the sealing effectiveness of main leaf and hydroecium, improve the sealing of radiator further.Occlusion simultaneously for main leaf one side biting teeth can be with one-shot forming, and the main leaf wide for certain core is engaged can complete on same undercut machine with hydroecium, and undercut work efficiency can be greatly improved.
Further, the present invention is not in the case of affecting welding, not changing main leaf integral thickness and material composition, new construction is used by main leaf, increase main leaf contacts fixed-area with radiating tube, can effectively slow down because insufficient strength causes deformation and the generation of Splitting, reach to improve the purpose of main leaf intensity, improve the reliability of radiator.
Accompanying drawing explanation
Fig. 1 is main slice of radiator of the present invention occlusion pre-structure figure (shaft side figure)；
Fig. 2 is main slice of radiator of the present invention occlusion pre-structure figure (top view)；
Fig. 3 is main slice of radiator of the present invention occlusion pre-structure figure (front view)；
Fig. 4 is main slice of radiator of the present invention occlusion pre-structure figure (left view)；
Fig. 5 is structure chart (shaft side figure) after main slice of radiator of the present invention occlusion；
Fig. 6 is structure chart (top view) after main slice of radiator of the present invention occlusion；
Fig. 7 is structure chart (front view) after main slice of radiator of the present invention occlusion；
Fig. 8 is structure chart (left view) after main slice of radiator of the present invention occlusion；
Fig. 9 is that the overall structure that main slice of radiator of the present invention is engaged with hydroecium splits schematic diagram；
Figure 10 is that the overall structure that main slice of radiator of the present invention is engaged with hydroecium assembles schematic diagram；
Figure 11 is the hole center line sectional view (the A-A view of Fig. 6) of the main slice of radiator of the first form according to present invention enforcement；
Figure 12 is the hole wall center line sectional view (the B-B view of Fig. 6) of the main slice of radiator of the first form according to present invention enforcement；
Figure 13 is the structural representation (hole center line sectional view) that the main slice of radiator in Figure 11 and 12 signal is connected with radiating tube；
Figure 14 is the second main slice of radiator structural representation (hole center line sectional view) implemented according to the present invention；
Figure 15 is the second main slice of radiator structural representation (hole wall center line sectional view) implemented according to the present invention；
Figure 16 is the third main slice of radiator structural representation (hole center line sectional view) implemented according to the present invention；
Figure 17 is the third main slice of radiator structural representation (hole wall center line sectional view) implemented according to the present invention；
Figure 18 is the 4th kind of main slice of radiator structural representation (hole center line sectional view) implemented according to the present invention；
Figure 19 is the 4th kind of main slice of radiator structural representation (hole wall center line sectional view) implemented according to the present invention；
Figure 20 is the structural representation that in prior art, main slice of radiator is connected with radiating tube.
In accompanying drawing 1-19, the explanation of each accompanying drawing is corresponding as follows:
1, main leaf；1.1, horizontal gap；2, hole wall connects band；3, sealing gasket；4, groove；5, occlusion wall；6, concave station；7, hydroecium；7.1 boss；8, radiating tube；9, strip hole；10, arch hole wall band.
Detailed description of the invention
Fig. 1-19 is the high-strength radiator main leaf structural representation with snap engagement structure implemented according to the present invention.Fig. 1-10 is that the present invention improves concrete schematic diagram about undercut design.Main slice of radiator includes that the main leaf 1 occlusion wall 5 for containing hydroecium circumference wall that is unilateral and that enclose in the unilateral surrounding of main leaf, occlusion wall 5 and the unilateral junction of main leaf arrange the groove 4 of containing hydroecium；It is characterized in that: described occlusion wall 5 is the straight wall of vertical direction, on this occlusion wall 5, spaced set has the horizontal gap 1.1 of preseting length, described horizontal gap 1.1 is positioned at same vertical height and becomes a horizontal linear distribution on each occlusion wall so that all horizontal gap 1.1 surround a rectangle along occlusion wall 5 circumference；The boss 7.1 simultaneously horizontally outward protruded with the described horizontal corresponding spaced set of gap 1.1 on hydroecium 7 circumference wall, described boss 7.1 laterally equidistantly staggers with the horizontal gap 1.1 on main slice of radiator 1, make when described main slice of radiator 1 is engaged with hydroecium circumference wall, the concave station 6 that the wall that straight wall on the 1.1 of the main slice of radiator occlusion horizontal gap of wall is extruded inward between formation and hydroecium boss fits, and laterally straight wall without horizontal opening position is fitted with hydroecium boss 7.1 between gap 1.1, form sealing.
Further, described boss 7.1 bottom of hydroecium circumference wall is vertical wall, between this vertical wall lower end and groove, periphery gasket 3 is set, when described main slice of radiator occlusion wall 5 is engaged with hydroecium circumference wall, straight wall under the occlusion horizontal gap of wall 1.1 keeps vertically, and sealing gasket 3 is interposed in this vertical wall and groove bottom land and be engaged between the straight wall under the horizontal gap of wall 1.1 formation sealing.
Further, the described horizontal gap 1.1 on occlusion wall 5 is vertically positioned at position, upper middle on occlusion wall 5 so that the sealing station space of bottom is sufficiently large, and relatively undercut.
Further, described horizontal gap 1.1 is rectangle at occlusion wall upper section, and rectangle long edge horizontal cross is arranged, and rectangle minor face vertically has preseting length, so that gap is arranged uniformly, undercut is in hgher efficiency.
Thus, the crimping biting teeth on main leaf 1 changes straight plate into, equidistantly opens the gap of certain length, simultaneously spaced set boss on hydroecium, and equidistantly staggers with the gap on main leaf；When main leaf is engaged with hydroecium, the straight plate on gap is extruded by undercut machine, until the upper straight-plate of gap is fitted with hydroecium wall, fits with hydroecium boss without the straight plate of opening position, is formed and seal.In this technical scheme, the straight plate on main leaf and hydroecium boss and wall laminating, hydroecium is formed the location in tri-directions of X, Y, Z, increases the sealing effectiveness of main leaf and hydroecium, improve the sealing of radiator further.Occlusion simultaneously for main leaf one side biting teeth can be with one-shot forming, and the main leaf wide for certain core is engaged can complete on same undercut machine with hydroecium, and undercut work efficiency can be greatly improved.
In Fig. 6,11-13, the above-mentioned main slice of radiator with quick undercut design is further improved, strengthens the weld strength of main leaf further.This main slice of radiator 1 is arranged at the longitudinal uniform intervals in the unilateral edge of main leaf can accommodate the strip hole 9 that radiating tube passes through, the long edge horizontal cross of strip hole 9 is arranged, and the horizontal vertical projection of strip hole 9 is rectangle fillet hole, it is characterized in that: unilateral the raising up relative to groove of main leaf forms described strip hole platform, arrange on this strip hole platform relative to this strip hole platform concave downward and perpendicular extend arch hole wall band 10 so that whole arch hole wall band 10 all contact with each radiating tube 8 fix；This arch hole wall band 10 lower edge is higher than the inner groove surface of described groove 4.Arch hole wall band 10 upper limb and face, lower edge place in Figure 11-13 are plane, and these two planes are below described strip hole platform place plane.Hole wall between adjacent two strip holes 9 are longitudinal connects plane on band 2 and arranges less than described arch hole wall band 10 upper limb, lower plane is concordant with described arch hole wall band 10 lower edge so that described hole wall connection carries 2 round and smooth domatic with the longitudinally connected formation of described arch hole wall band 10 from both sides respectively or flexure planes.
In technique scheme, the unilateral center line longitudinal along level of main leaf is by described arch hole wall band 10；Described arch hole wall band 10 upper limb is less than the bottom surface of hydroecium.
Embodiment 2: Fig. 6,14,15 is at the above-mentioned the second main slice of radiator structural representation having on the basis of quick undercut design.By hole center line sectional view and hole wall center line sectional view it can be seen that with previous embodiment 1 except that: described arch hole wall band 10 upper limb and face, lower edge place are cambered surface, and this cambered surface is positioned at the position of center line relative to described strip hole platform place planar recess.
Embodiment 3: Fig. 6,16,17 is at above-mentioned the third main slice of radiator structural representation implemented according to the present invention having on the basis of quick undercut design.Be can be seen that by hole center line sectional view and hole wall center line sectional view, with previous embodiment 1 except that: described arch hole wall band 10 upper limb and face, lower edge place are plane, being correspondingly arranged multiple evenly spaced vertical circular arc upper dome in upper limb plane and lower edge plane, each vertical circular arc upper dome upper limb is less than the bottom surface of hydroecium；Connecting on 2 at described hole wall accordingly and be correspondingly arranged protruding circular arc vault, the circular arc vault of this correspondence is protruding upward connects band 2 place planes in described hole wall so that it is round and smooth domatic with the longitudinally connected formation of arch hole wall band 10 that described hole wall connects band 2.
Embodiment 4: Fig. 6,18,19 for above-mentioned have on the basis of quick undercut design for the 4th kind of main slice of radiator structural representation implemented according to the present invention.Be can be seen that by hole center line sectional view and hole wall center line sectional view, with embodiment 1 except that: described arch hole wall band upper limb and lower edge place plane be extension trend consistent wave line style bending vault face, corresponding described hole wall connects band 2 and also bends vault for wave line style, making described hole wall connect band 2 and the bending longitudinally connected formation of arch hole wall band 10 of described wave line style is round and smooth domatic and curved surface, the wave line style bending vault face of described arch hole wall band is symmetrical relative to bobbin centered by described longitudinal midline.
The schematic diagram that embodiment 2,3,4 connects with radiating tube 8 is all similar with the Figure 13 in embodiment 1, it it is all the song vault hole wall using non-rectilinear gabarit, thus add the fixing contact area of main slice of radiator and radiating tube, so that main leaf increases with the contact area of welding of radiating tube, intensity enhancing, the risk of the failure mode being deformed tear and leakage can be reduced, improve the reliability of radiator.
Claims (10)
1. having a high-strength radiator main leaf for snap engagement structure, the occlusion wall for containing hydroecium circumference wall that is unilateral including main leaf and that enclose in the unilateral surrounding of main leaf, occlusion wall and the unilateral junction of main leaf arrange the groove of containing hydroecium；Can accommodate, unilateral arrange along longitudinal uniform intervals of main leaf, the strip hole that heat radiating tube of heat radiator passes through, the long edge horizontal cross of strip hole is arranged, and radiating tube is by this strip hole and fixing with the hole wall of this strip hole is connected, it is characterised in that:
Unilateral the raising up relative to described groove of main leaf forms described strip hole platform, arrange on this strip hole platform relative to this strip hole platform concave downward or arch upward and perpendicular extend arch hole wall band so that whole hole wall band all contact with each radiating tube fix；
Described occlusion wall is the straight wall of vertical direction, and on this occlusion wall, spaced set has the horizontal gap of preseting length,
Described horizontal gap is positioned at same vertical height and becomes a horizontal linear distribution on each occlusion wall so that all horizontal gap surround a rectangle along occlusion wall circumference；The boss simultaneously horizontally outward protruded with the described corresponding spaced set of horizontal gap on hydroecium circumference wall, described boss the most equidistantly staggers with the horizontal gap on main slice of radiator, make when described main slice of radiator is engaged with hydroecium circumference wall, the wall that straight wall on the main slice of radiator occlusion horizontal gap of wall is extruded inward between hydroecium boss fits, and laterally straight wall without horizontal opening position fits with hydroecium boss between gap, form sealing.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterised in that: the described boss bottom of hydroecium circumference wall is vertical wall, arranges periphery gasket between this vertical wall lower end and groove,
When described main slice of radiator occlusion wall be engaged with hydroecium circumference wall, the straight wall under the occlusion horizontal gap of wall keeps vertically, and sealing gasket is interposed in this vertical wall and groove bottom land and is engaged between the straight wall under the horizontal gap of wall and forms sealing.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterised in that: the described horizontal gap on occlusion wall is vertically positioned at position, upper middle on occlusion wall.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterised in that: described horizontal gap is rectangle at occlusion wall upper section, and long edge horizontal cross is arranged, and minor face vertically has preseting length.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterized in that: the hole wall between adjacent two strip holes connects the upper plane of band and arranges less than described hole wall band upper limb, lower plane is concordant with described hole wall band lower edge so that it is round and smooth domatic with the described longitudinally connected formation of hole wall band that described hole wall connects band.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterised in that: the unilateral center line longitudinal along level of main leaf is by described arch hole wall band；Described arch hole wall band upper limb is less than the bottom surface of hydroecium.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterised in that: described arch hole wall band upper limb and face, lower edge place are plane, and these two planes form step arch face less than described strip hole platform place plane.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterized in that: described arch hole wall band upper limb and face, lower edge place are cambered surface, and this cambered surface is positioned at the position of longitudinal midline relative to described strip hole platform place planar recess.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterized in that: described arch hole wall band upper limb and face, lower edge place are plane, upper plane and lower plane are correspondingly arranged multiple evenly spaced vertical circular arc upper dome；Connecting at described hole wall accordingly and be correspondingly arranged protruding circular arc vault on band, the circular arc vault of this correspondence is protruding upward connects band place plane in described hole wall so that it is round and smooth domatic along longitudinally connected formation with described circular arc vault that described hole wall connects band.
The high-strength radiator main leaf with snap engagement structure the most according to claim 1, it is characterized in that: described arch hole wall band upper limb and the wave line style bending vault face that lower edge place plane is that extension trend is consistent, corresponding described hole wall connects band and also bends vault for wave line style, making described hole wall connect band round and smooth domatic with the bending arch longitudinally connected formation of hole wall band of described wave line style, the wave line style bending vault face of described arch hole wall band is symmetrical relative to bobbin centered by described longitudinal midline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510628767.3A CN105127325B (en) | 2015-09-28 | 2015-09-28 | High-strength radiator main leaf adopting rapid occlusion structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510628767.3A CN105127325B (en) | 2015-09-28 | 2015-09-28 | High-strength radiator main leaf adopting rapid occlusion structure |
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| CN105127325B true CN105127325B (en) | 2017-01-11 |
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| CN101191706A (en) * | 2006-11-29 | 2008-06-04 | 株式会社电装 | Method of manufacturing header tank for heat exchanger and heat exchanger having the header tank |
| CN202255055U (en) * | 2011-08-23 | 2012-05-30 | 贝洱(济南)热系统有限公司 | Connecting structure for main fin and water chamber of radiator |
| CN104508418A (en) * | 2012-07-18 | 2015-04-08 | 株式会社电装 | Heat exchanger |
| CN204975105U (en) * | 2015-09-28 | 2016-01-20 | 湖北雷迪特冷却系统股份有限公司 | High strength radiator main leaf with quick occlusal structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080053645A1 (en) * | 2006-08-31 | 2008-03-06 | Denso Corporation | Heat exchanger and manufacture method for the same |
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2015
- 2015-09-28 CN CN201510628767.3A patent/CN105127325B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191706A (en) * | 2006-11-29 | 2008-06-04 | 株式会社电装 | Method of manufacturing header tank for heat exchanger and heat exchanger having the header tank |
| CN202255055U (en) * | 2011-08-23 | 2012-05-30 | 贝洱(济南)热系统有限公司 | Connecting structure for main fin and water chamber of radiator |
| CN104508418A (en) * | 2012-07-18 | 2015-04-08 | 株式会社电装 | Heat exchanger |
| CN204975105U (en) * | 2015-09-28 | 2016-01-20 | 湖北雷迪特冷却系统股份有限公司 | High strength radiator main leaf with quick occlusal structure |
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Denomination of invention: A high-strength heat sink main plate with a fast bite structure Effective date of registration: 20230619 Granted publication date: 20170111 Pledgee: China Construction Bank Corporation Wuhan Provincial Sub-branch Pledgor: HUBEI LEIDITE COOLING SYSTEM CO.,LTD. Registration number: Y2023420000238 |
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