CN103489683A - Key structure - Google Patents
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- CN103489683A CN103489683A CN201310378465.6A CN201310378465A CN103489683A CN 103489683 A CN103489683 A CN 103489683A CN 201310378465 A CN201310378465 A CN 201310378465A CN 103489683 A CN103489683 A CN 103489683A
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Abstract
The invention discloses a key structure which comprises a key seat (100) and a key (200). The key seat (100) is provided with an assembling cavity (110), and the key (200) is movably arranged in the assembling cavity (110). The key structure is additionally provided with at least one rolling part, wherein the rolling part is installed on one of the key (200) and the key seat (100) in a rotating mode and is in rolling fit with the other one of the key and the key seat. The key (200) is pressed to drive the rolling part to roll to reduce the friction between the key (200) and the key seat (100). Compared with existing rolling fit between a guide rib and a slide groove, the friction generated by rolling fit is far smaller than the friction generated by slide fit. Thus, the pressing force for pressing the key is small.
Description
Technical field
The present invention relates to press-key structure.
Background technology
Existing press-key structure, the press-key structure of draining valve particularly, it comprises key base and keying body, the keying body overwhelming majority adopts the mode be slidably connected to be installed in key base,, the mode that guiding rib by keying body and the chute of key base setting are slidingly fitted, its friction force value is larger, and because sliding friction is subject to the impact of coefficient of friction, when the impurity in water tank or other pollutants are more, coefficient of friction between guiding rib and chute strengthens, and causes further strengthening by the bonding force value, is inconvenient to use.
Summary of the invention
The invention provides press-key structure, it has overcome the existing deficiency of background technology.The technical scheme adopted that the present invention solves its technical problem is: press-key structure, it is characterized in that: it comprises key base (100) and button (200), key base (100) is provided with assembly cavity (110), button (200) activity is installed in assembly cavity (110), separately be provided with at least one rolling member, this rolling member rotates and is installed in button (200) with wherein parts in key base (100) two parts and rolls and coordinate mutually with another parts in two parts, pressing keys (200) drives rolling member and rolls to reduce the friction between button (200) and key base (100).
Among one preferred embodiment: described button (200) comprises press section (220) and is installed in the guide part (230) of press section (220), described key base (100) comprises the extension (130) of pedestal (120) and affixed pedestal (120), described assembly cavity (110) runs through pedestal (120) and extension (130), described rolling member rotates and is installed in press section (220) with wherein parts in pedestal (120) two parts and rolls and coordinate mutually with another parts in two parts, or and, rolling member rotates and to be installed in extension (130) with wherein parts in guide part (230) two parts and to roll and coordinate mutually with another parts in two parts.
Among one preferred embodiment: described rolling member comprises the first rolling member (300) and the second rolling member (400) in the two or all, wherein, the first rolling member (300) rotates and to be installed in extension (130) and to roll mutually and coordinate or the first rolling member (300) rotation is installed in guide part (230) and rolls and coordinate mutually with extension (130) with guide part (230); The second rolling member (400) rotates and to be installed in press section (220) and to roll mutually and coordinate or the second rolling member (400) rotation is installed in pedestal (120) and rolls and coordinate mutually with press section (220) with pedestal (120).
Among one preferred embodiment: described guide part (230) is provided with the first rolling groove (210) extended along button (200) activity direction, the first rolling member (300) rotates and is installed in the assembly cavity (110) that is positioned at extension (130) and rolls and coordinate mutually with the first rolling groove (210), perhaps, described extension (130) is provided with the first rolling groove (210) extended along button (200) activity direction, and the first rolling member (300) rotates and is installed in the assembly cavity (110) that is positioned at extension (130) and rolls and coordinate mutually with the first rolling groove (210); When the top ends of the first rolling member (300) in the first rolling groove (210) or bottom, to button (200) stroke, carry out spacing.
Among one preferred embodiment: the center of described guide part (230) offers the first rolling groove (210), and described the first rolling member (300) vertically rolls and coordinates through the first rolling groove (210) and with the first rolling groove (210) at the first rolling groove (210) length direction.
Among one preferred embodiment: described the first rolling member (300) is roller bearing, this roller bearing comprises the boss (320) of roller bearing body (310) and affixed roller bearing body (310), described extension (130) is provided with the support slot (131) of a connection assembly cavity (110) and the through hole (132) of a connection assembly cavity (110), support slot (131) and through hole (132) positioned opposite, roller bearing body (310) stretches into through hole (132), boss (320) stretches into support slot (131), and roller bearing body (310) rolls and coordinates with the first rolling groove (210).
Among one preferred embodiment: described extension (130) also is provided with a bulge loop (133) that is positioned at end face outside through hole (132), separately be provided with a buckle closure (140), this buckle closure (140) is provided with a guide vane end stop (141), this guide vane end stop (141) stretch in bulge loop (133) and with bulge loop (133) phase tight fit.
Among one preferred embodiment: the assembly cavity (110) that is positioned at extension (130) has two sidewalls, two sidewalls are respectively equipped with described first rolling groove (210), described guide part (230) is provided with a rotation slot (231), described the first rolling member (300) comprises an axis (330) and is installed in the second wheel (340) of two ends of axis (330), and described axis (330) is through rotation slot (231) and with rotation slot (231), be rotatably assorted and second wheel (340) rolls and coordinates mutually with 2 first rolling grooves (210) respectively.
Among one preferred embodiment: one of described axis (330) end affixed wherein roller (340), the other end of axis (330) is provided with four buckles (331), four buckles (331) are arranged symmetrically with ringwise and in twos, another roller (340) offers one " ten " font fluting (341), and four buckles (331) are all through slotting (341) and being connected on the end face of fluting (341).
Among one preferred embodiment: the assembly cavity (110) that is positioned at extension (130) has two sidewalls, the bottom of two sidewalls is provided with respectively loose slot (134), described the first rolling member (300) comprises 2 first rotating shafts (360) of one first roller wheel body (350) and affixed the first roller wheel body (350), 2 first rotating shafts (360) lay respectively at two sides of the first roller wheel body (350), and 2 first rotating shafts (360) are rotated respectively the loose slot (134) and the first roller wheel body (350) that are installed in two sidewalls and rolled and coordinate mutually with the side of guide part (230).
Among one preferred embodiment: described the second rolling member (400) rolls and is installed in press section (220), the chamber wall of assembly cavity (110) is provided with the second rolling groove (111) extended along assembly cavity (110) length direction, and this second rolling groove (111) rolls and coordinates mutually with the second rolling member (400).
Among one preferred embodiment: described the second rolling member (400) comprises 2 second rotating shafts (420) of the second roller wheel body (410) and affixed the second roller wheel body (410), this 2 second rotating shaft (420) lays respectively at two sides of the second roller wheel body (410), described press section (220) convexes with two spaced apart fixed blocks (221) downwards, the fluting (223) that fixed block (221) is provided with an axis hole (222) and is connected with axis hole (222), this fluting (223) extends to the side of fixed block (221), the second rotating shaft (420) from the opening part of fluting (223) extend transversely into fluting (223) and with slot (223) phase tight fit, and enter in axis hole (222) and rotate and coordinate with axis hole (222).
Among one preferred embodiment: described the second rolling member (400) is ball, described press section (220) convexes with two spaced apart locating pieces (240) and a clamping block (250) between two locating pieces (240) downwards, and ball is positioned at the space that two locating pieces (240) surround with block (250) and rolls and coordinate mutually with the second rolling groove (111).
The technical program is compared with background technology, and it has following advantage:
1. rotate attaching one rolling member on button or key base, pressing keys drives rolling member and rolls to reduce the friction between button and key base, with existing guiding rib, with being slidably matched of chute, compare, the frictional force roll to coordinate produced is far smaller than the frictional force that is slidably matched and produces, so that the pressing force needed during pressing keys is less.
2. can establish as required the first rolling member or the second rolling member or the first rolling member is set and the second rolling member simultaneously, arranging flexibly.
3. guide part or extension are provided with the first rolling groove, when the top ends of the first rolling member in the first rolling groove or bottom, to key stroke, carry out spacing.
4. the first rolling groove is opened in the center of guide part, not only makes button stressed evenly, and does not take additional space while coordinating with the first rolling member.
5. the second rolling member rolls and to be installed in press section, and the second rolling groove rolls and coordinates mutually with the second rolling member, further reduces the friction between button and key base, presses the bonding force value less.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 has illustrated one of the perspective exploded view of the press-key structure of the first preferred embodiment.
Fig. 2 illustrated the first preferred embodiment press-key structure perspective exploded view two.
Fig. 3 has illustrated the use state diagram of the press-key structure of the first preferred embodiment.
Fig. 4 has illustrated the cross-sectional schematic of the press-key structure of the first preferred embodiment.
Fig. 5 has illustrated one of the structural representation of the button of the first preferred embodiment.
Fig. 6 illustrated the first preferred embodiment button structural representation two.
Fig. 7 has illustrated the perspective exploded view of the press-key structure of the second preferred embodiment.
Fig. 8 has illustrated the perspective exploded view of the press-key structure of the 3rd preferred embodiment.
Fig. 9 has illustrated the overall structure schematic diagram of the press-key structure of the 3rd preferred embodiment.
Figure 10 has illustrated the cross-sectional schematic of the press-key structure of the 3rd preferred embodiment.
Figure 11 has illustrated the perspective exploded view of the press-key structure of the 4th preferred embodiment.
Figure 12 has illustrated the overall structure schematic diagram of the press-key structure of the 4th preferred embodiment.
Embodiment
Please refer to Fig. 1 to Fig. 6, a preferred embodiment of press-key structure, described press-key structure, it comprises key base 100, button 200 and at least one rolling member.
Described key base 100 is provided with assembly cavity 110.In the present embodiment, described key base 100 comprises two extensions 130 of pedestal 120 and affixed pedestal 120, and described assembly cavity 110 numbers are made as two, and two assembly cavities 110 run through respectively pedestal 120 and two extensions 130, and two assembly cavities that are positioned at pedestal 120 are connected.
In the present embodiment, described extension 130 is provided with the support slot 131 of a connection assembly cavity 110 and the through hole 132 of a connection assembly cavity 110, support slot 131 and through hole 132 positioned opposite.
In the present embodiment, described extension 130 also is provided with a bulge loop 133 that is positioned at end face outside through hole 132, separately is provided with a buckle closure 140, and this buckle closure 140 is provided with a guide vane end stop 141, this guide vane end stop 141 stretch in bulge loop 133 and with bulge loop 133 phase tight fits.
Described button 200 numbers be made as two and respectively activity be installed in two assembly cavities 110.In the present embodiment, described button 200 comprises press section 220 and is installed in the guide part 230 of press section 220.In the present embodiment, described guide part 230 is provided with first rolling groove 210, the first rolling members 300 rotations of extending along button 200 activity directions and is installed in the assembly cavity 110 that is positioned at extension 130 and rolls and coordinate mutually with the first rolling groove 210.In the present embodiment, the center of described guide part 230 offers described the first rolling groove 210.The first rolling groove is opened in the center of guide part, not only makes button stressed evenly, and does not take additional space while coordinating with the first rolling member.
In the present embodiment, described press section 220 convexes with two spaced apart fixed blocks 221 downwards, the fluting 223 that fixed block 221 is provided with an axis hole 222 and is connected with axis hole 222, and this fluting 223 extends to the side of fixed block 221.
Described rolling member rotates and is installed in button 200 with wherein parts in key base 100 2 parts and rolls and coordinates mutually with another parts in two parts, and pressing keys 200 drive rolling members roll to reduce the friction between button 200 and key base 100.
In the present embodiment, described rolling member rotates and is installed in press section 220 with wherein parts in pedestal 120 2 parts and rolls and coordinate mutually with another parts in two parts, perhaps, described rolling member rotates and is installed in extension 130 with wherein parts in guide part 230 2 parts and rolls and coordinate mutually with another parts in two parts, perhaps, when key base 100 sizes more greatly or whenever necessary, can between press section 220 and pedestal 120 and between extension 130 and guide part 230, rolling member be set simultaneously, the present embodiment adopts this kind of mode, but not as limit.
In the present embodiment, described rolling member not only comprises the first rolling member 300 but also comprise the second rolling member 400.
Wherein, the first rolling member 300 rotates and is installed in extension 130 and rolls and coordinate mutually with guide part 230.In the present embodiment, described the first rolling member 300 vertically rolls and coordinates through the first rolling groove 210 and with the first rolling groove 210 at the first rolling groove 210 length directions.When the top ends of the first rolling member 300 in the first rolling groove 210 or bottom, to button 200 strokes, carry out spacing.As required, also can be set to: the first rolling member 300 rotates and is installed in guide part 230 and rolls and coordinate mutually with extension 130.When the top ends of the first rolling member in the first rolling groove or bottom, key stroke is carried out spacingly, this first rolling groove has the position-limiting action to button, without additionally arrange position-limit mechanism button is carried out spacing, more compact structure.
In the present embodiment, described the first rolling member 300 is roller bearing, and this roller bearing comprises the boss 320 of roller bearing body 310 and affixed roller bearing body 310, and roller bearing body 310 stretches into through hole 132, boss 320 stretches into support slot 131, and roller bearing body 310 rolls and coordinates with the first rolling groove 210.Simultaneously, under the effect of buckle closure 140 and guide vane end stop 141, roller bearing is carried out to cross spacing, prevent that roller bearing from deviating from.
Described the second rolling member 400 rotates and is installed in press section 220 and rolls and coordinate mutually with pedestal 120.As required, also can be set to: the second rolling member 400 rotates and is installed in pedestal 120 and rolls and coordinate mutually with press section 220.
In the present embodiment, described the second rolling member 400 rolls and is installed in press section 220.In the present embodiment, the chamber wall that is positioned at the assembly cavity 110 of pedestal 120 is provided with the second rolling groove 111 extended along assembly cavity 110 length directions, and this second rolling groove 111 rolls and coordinates mutually with the second rolling member 400.
In the present embodiment, described the second rolling member 400 comprises 2 second rotating shafts 420 of the second roller wheel body 410 and affixed the second roller wheel body 410, this 2 second rotating shaft 420 lays respectively at two sides of the second roller wheel body 410, and the second rotating shaft 420 extends transversely into fluting 223 and with fluting 223 phase tight fits and enter in axis hole 222 and rotate and coordinate with axis hole 222 from 223 the opening part of slotting.Make the convenient mounting or dismounting of the second rolling member 400, be convenient for changing.
Pressing keys drives the first rolling member and rolls in the first rolling groove and drive the second rolling member roll to reduce the friction between button and assembly cavity in the second rolling groove, with existing guiding rib, with being slidably matched of chute, compare, the frictional force roll to coordinate produced is far smaller than the frictional force that is slidably matched and produces, so that the pressing force needed during pressing keys is less.
Please referring to Fig. 7, is the second preferred embodiment of press-key structure.The difference of the present embodiment and a upper embodiment is, in the present embodiment, described the second rolling member 400 is ball, described press section 220 convexes with two spaced apart locating pieces 240 and a clamping block 250 between two locating pieces 240 downwards, and ball is positioned at the space that two locating pieces 240 surround with block 250 and rolls and coordinate mutually with the second rolling groove 111.
Please referring to Fig. 8 to Figure 10, is the 3rd preferred embodiment of press-key structure.The present embodiment is that from the difference of the first embodiment the mounting means of the first rolling member is different.
In the present embodiment, described extension 130 is provided with first rolling groove 210, the first rolling members 300 rotations of extending along button 200 activity directions and is installed in the assembly cavity 110 that is positioned at extension 130 and rolls and coordinate mutually with the first rolling groove 210.
In the present embodiment, the assembly cavity 110 that is positioned at extension 130 has two sidewalls, two sidewalls are respectively equipped with one first rolling groove 210, described guide part 230 is provided with a rotation slot 231, described the first rolling member 300 comprises an axis 330 and is installed in the second wheel 340 of two ends of axis 330, and described axis 330 is through rotation slot 231 and with rotation slot 231, be rotatably assorted and second wheel 340 rolls and coordinates mutually with 2 first rolling grooves 210 respectively.
In the present embodiment, the affixed wherein roller 340 of one of described axis 330 end, the other end of axis 330 is provided with four buckles 331, four buckles 331 are arranged symmetrically with ringwise and in twos, another roller 340 offers 341, four buckles 331 of one " ten " font fluting all through fluting 341 and be connected on 341 the end face of slotting.
Please referring to Figure 11 to Figure 12, is the 4th preferred embodiment of press-key structure.The present embodiment is that from the difference of the first embodiment the mounting means of the first rolling member is different.
In the present embodiment, the assembly cavity 110 that is positioned at extension 130 has two sidewalls, the bottom of two sidewalls is provided with respectively loose slot 134, described the first rolling member 300 comprises 2 first rotating shafts 360 of one first roller wheel body 350 and affixed the first roller wheel body 350,2 first rotating shafts 360 lay respectively at two sides of the first roller wheel body 350, and 2 first rotating shafts 360 are rotated respectively the loose slot 134 and the first roller wheel body 350 that are installed in two sidewalls and rolled and coordinate mutually with the side of guide part 230.
The above, only for preferred embodiment of the present invention, therefore can not limit according to this scope of the invention process, the equivalence of doing according to the scope of the claims of the present invention and description changes and modifies, and all should still belong in the scope that the present invention contains.
Claims (13)
1. press-key structure, it is characterized in that: it comprises key base (100) and button (200), key base (100) is provided with assembly cavity (110), button (200) activity is installed in assembly cavity (110), separately be provided with at least one rolling member, this rolling member rotates and is installed in button (200) and the wherein parts in key base (100) two parts and rolls and coordinate mutually with another parts in two parts, and pressing keys (200) drive rolling member rolls to reduce the friction between button (200) and key base (100).
2. press-key structure according to claim 1, it is characterized in that: described button (200) comprises press section (220) and is installed in the guide part (230) of press section (220), described key base (100) comprises the extension (130) of pedestal (120) and affixed pedestal (120), described assembly cavity (110) runs through pedestal (120) and extension (130), described rolling member rotates and is installed in press section (220) with wherein parts in pedestal (120) two parts and rolls and coordinate mutually with another parts in two parts, or and, rolling member rotates and to be installed in extension (130) with wherein parts in guide part (230) two parts and to roll and coordinate mutually with another parts in two parts.
3. press-key structure according to claim 2, it is characterized in that: described rolling member comprises the first rolling member (300) and the second rolling member (400) in the two or all, wherein, the first rolling member (300) rotates and to be installed in extension (130) and to roll mutually and coordinate or the first rolling member (300) rotation is installed in guide part (230) and rolls and coordinate mutually with extension (130) with guide part (230); The second rolling member (400) rotates and to be installed in press section (220) and to roll mutually and coordinate or the second rolling member (400) rotation is installed in pedestal (120) and rolls and coordinate mutually with press section (220) with pedestal (120).
4. press-key structure according to claim 3, it is characterized in that: described guide part (230) is provided with the first rolling groove (210) extended along button (200) activity direction, the first rolling member (300) rotates and is installed in the assembly cavity (110) that is positioned at extension (130) and rolls and coordinate mutually with the first rolling groove (210), perhaps, described extension (130) is provided with the first rolling groove (210) extended along button (200) activity direction, the first rolling member (300) rotates and is installed in the assembly cavity (110) that is positioned at extension (130) and rolls and coordinate mutually with the first rolling groove (210), when the top ends of the first rolling member (300) in the first rolling groove (210) or bottom, to button (200) stroke, carry out spacing.
5. press-key structure according to claim 4, it is characterized in that: the center of described guide part (230) offers the first rolling groove (210), and described the first rolling member (300) vertically rolls and coordinates through the first rolling groove (210) and with the first rolling groove (210) at the first rolling groove (210) length direction.
6. according to the described press-key structure of claim 4 or 5, it is characterized in that: described the first rolling member (300) is roller bearing, this roller bearing comprises the boss (320) of roller bearing body (310) and affixed roller bearing body (310), described extension (130) is provided with the support slot (131) of a connection assembly cavity (110) and the through hole (132) of a connection assembly cavity (110), support slot (131) and through hole (132) positioned opposite, roller bearing body (310) stretches into through hole (132), boss (320) stretches into support slot (131), roller bearing body (310) rolls and coordinates with the first rolling groove (210).
7. press-key structure according to claim 6, it is characterized in that: described extension (130) also is provided with a bulge loop (133) that is positioned at end face outside through hole (132), separately be provided with a buckle closure (140), this buckle closure (140) is provided with a guide vane end stop (141), this guide vane end stop (141) stretch in bulge loop (133) and with bulge loop (133) phase tight fit.
8. press-key structure according to claim 4, it is characterized in that: the assembly cavity (110) that is positioned at extension (130) has two sidewalls, two sidewalls are respectively equipped with described first rolling groove (210), described guide part (230) is provided with a rotation slot (231), described the first rolling member (300) comprises an axis (330) and is installed in the second wheel (340) of two ends of axis (330), described axis (330) is through rotation slot (231) and with rotation slot (231), be rotatably assorted and second wheel (340) rolls and coordinates mutually with 2 first rolling grooves (210) respectively.
9. press-key structure according to claim 8, it is characterized in that: one of described axis (330) end affixed wherein roller (340), the other end of axis (330) is provided with four buckles (331), four buckles (331) are arranged symmetrically with ringwise and in twos, another roller (340) offers one " ten " font fluting (341), and four buckles (331) are all through slotting (341) and being connected on the end face of fluting (341).
10. press-key structure according to claim 3, it is characterized in that: the assembly cavity (110) that is positioned at extension (130) has two sidewalls, the bottom of two sidewalls is provided with respectively loose slot (134), described the first rolling member (300) comprises 2 first rotating shafts (360) of one first roller wheel body (350) and affixed the first roller wheel body (350), 2 first rotating shafts (360) lay respectively at two sides of the first roller wheel body (350), 2 first rotating shafts (360) are rotated respectively the loose slot (134) and the first roller wheel body (350) that are installed in two sidewalls and are rolled and coordinate mutually with the side of guide part (230).
11. press-key structure according to claim 3, it is characterized in that: described the second rolling member (400) rolls and is installed in press section (220), the chamber wall of assembly cavity (110) is provided with the second rolling groove (111) extended along assembly cavity (110) length direction, and this second rolling groove (111) rolls and coordinates mutually with the second rolling member (400).
12. press-key structure according to claim 11, it is characterized in that: described the second rolling member (400) comprises 2 second rotating shafts (420) of the second roller wheel body (410) and affixed the second roller wheel body (410), this 2 second rotating shaft (420) lays respectively at two sides of the second roller wheel body (410), described press section (220) convexes with two spaced apart fixed blocks (221) downwards, the fluting (223) that fixed block (221) is provided with an axis hole (222) and is connected with axis hole (222), this fluting (223) extends to the side of fixed block (221), the second rotating shaft (420) from the opening part of fluting (223) extend transversely into fluting (223) and with slot (223) phase tight fit, and enter in axis hole (222) and rotate and coordinate with axis hole (222).
13. press-key structure according to claim 11, it is characterized in that: described the second rolling member (400) is ball, described press section (220) convexes with two spaced apart locating pieces (240) and a clamping block (250) between two locating pieces (240) downwards, and ball is positioned at the space that two locating pieces (240) surround with block (250) and rolls and coordinate mutually with the second rolling groove (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310378465.6A CN103489683B (en) | 2013-08-27 | 2013-08-27 | Press-key structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310378465.6A CN103489683B (en) | 2013-08-27 | 2013-08-27 | Press-key structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103489683A true CN103489683A (en) | 2014-01-01 |
| CN103489683B CN103489683B (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310378465.6A Active CN103489683B (en) | 2013-08-27 | 2013-08-27 | Press-key structure |
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| CN (1) | CN103489683B (en) |
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| CN105909809A (en) * | 2016-04-19 | 2016-08-31 | 厦门瑞尔特卫浴科技股份有限公司 | Draining valve structure with small operating force value |
| CN106781203A (en) * | 2017-03-03 | 2017-05-31 | 翁碧莹 | A kind of indoor exchange smoke detector device |
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| CN203456348U (en) * | 2013-08-27 | 2014-02-26 | 厦门瑞尔特卫浴科技股份有限公司 | Key structure |
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| CN2545272Y (en) * | 2002-06-04 | 2003-04-16 | 厦门瑞尔特卫浴工业有限公司 | Push button of water discharge valve of cistern |
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| CN105909809A (en) * | 2016-04-19 | 2016-08-31 | 厦门瑞尔特卫浴科技股份有限公司 | Draining valve structure with small operating force value |
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| CN106781203B (en) * | 2017-03-03 | 2017-11-24 | 连云港市赣榆区生产力促进中心 | A kind of indoor exchange smoke detector device |
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| Publication number | Publication date |
|---|---|
| CN103489683B (en) | 2015-09-30 |
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