CN203445021U - Cover plate assembly of logic switch - Google Patents
Cover plate assembly of logic switch Download PDFInfo
- Publication number
- CN203445021U CN203445021U CN201320449330.XU CN201320449330U CN203445021U CN 203445021 U CN203445021 U CN 203445021U CN 201320449330 U CN201320449330 U CN 201320449330U CN 203445021 U CN203445021 U CN 203445021U
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- CN
- China
- Prior art keywords
- cover plate
- logic switch
- plate assembly
- edge
- sealing gasket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
A cover plate assembly of a logic switch is provided. The cover plate assembly of the logic switch is characterized in that the cover plate assembly includes the following components of: a cover plate which is provided with a flat base portion and an edge that surrounds the base edge and vertically extends from the base edge, wherein the base edge defines a bonding surface inside the edge; a sealing gasket of which the shape is matched with the shaped of the bonding surface of the cover plate such that the sealing gasket can substantially cover the bonding surface; and fasteners which pass through the cover plate and the sealing gasket and make the sealing gasket abut against a butt-joint surface of the casing of the logic switch so as to fix a fluid of the cover plate to the casing of the logic switch in a sealing manner. According to the cover plate of the cover plate assembly of the utility model, rainwater can directly flow downwards along the edge of the cover plate, and dust will not be accumulated at a gap between the cover plate and the casing; and further, the cover plate of the cover plate assembly of the utility model is stretched and molded through a stretching mold, and therefore, mold opening cost can be decreased.
Description
Technical field
The utility model relates to a kind of cover plate assembly of logic switch.
Background technology
Logic switch (or being called pressure logic switch) is a kind of control instrument that is widely used in automation control system.Logic switch is generally used for pressure or the temperature of the fluids such as measurement gas or liquid.In the pressure of detected fluid or temperature during higher or lower than rated value, logic switch can corresponding actions and change the on off operating mode of its sensitive switch comprising, and then reaches the object of automatic control.
Fig. 1 shows the cover plate assembly 12 of a kind of logic switch 10 of prior art and the housing 14 coordinating with this cover plate assembly 12.Fig. 2 shows the upward view of the cover plate 102 of this cover plate assembly 12.This cover plate assembly 12 comprises cover plate 102, sealing ring 104, securing member 106 and four O-ring seals 108.
Particularly, this cover plate 102 is roughly square, and it is formed through die casting die casting by the metal such as aluminium alloy.As shown in the figure, the edge 102b that it has base portion 102a and extends vertically downward around base portion 102a, that is, this edge 102b is formed at the installation surface that the circumferential edge of this base portion 102a and the lower surface of this edge 102b define sealing.On the lower surface of this edge 102b, offer circumferential recess 102c to hold sealing ring 104 in the inner.Further, four bights of this edge 102b also offer respectively through hole 102d to allow aforementioned fasteners 106 therefrom pass and this cover plate 102 is fixed on housing 14.Wherein, each securing member 106 all need sheathed aforesaid O-ring seals 108 so that this securing member 106 be fixed after this O-ring seals 108 be resisted against between the installation surface of cover plate 102 and the Butt sealing surface of housing 14.Particularly, this securing member 106 can be screw.This O-ring seals 108 can prevent securing member 106 dismounting process in lose.
Yet this cover plate assembly 12 exists following defect: if service time is long, the phenomenon that seeps water may appear in the gap between cover plate 102 and housing 14.This defect is almost fatal for logic switch.
Utility model content
In order to improve the sealing property of logic switch, the utility model proposes a kind of cover plate assembly of logic switch.This cover plate assembly comprises: cover plate, and it has smooth base portion and around described base portion and from the vertically extending edge of described base portion, described base portion defines composition surface in described edge; Sealing gasket, the composition surface of its shape and described cover plate is suitable roughly to cover described composition surface; And securing member, it is through described cover plate and described sealing gasket and described sealing gasket is abutted on the butting surface of housing of described logic switch, thus by described cover plate Fluid Sealing be fixed on the housing of described logic switch.
Particularly, thus the edge of described cover plate along the outer wall of the housing of described logic switch, extend when described cover plate is fixed on the housing of described logic switch described in the imbrication residence, edge of cover plate state the top edge of outer wall of the housing of logic switch.
Particularly, described cover plate is roughly square.
Particularly, described cover plate is formed by stretching.
Particularly, described sealing gasket is square.
Particularly, described securing member is screw.
More specifically, the bar portion that described screw has head and vertically extends from the head, described bar portion has the non-threaded part of close head and away from the threaded portion of head, wherein, the length of described non-threaded part is greater than the common thickness of described cover plate and sealing gasket.
The utlity model has following technological merit:
1, apply the cover plate of cover plate assembly of the present utility model, rainwater can be directly under the marginal flow of cover plate, and dust can not accumulate the place, gap between cover plate and housing yet.In addition,, because the cover plate of cover plate assembly of the present utility model is by drawing die stretch forming, this can reduce die sinking cost.
2, in the prior art, application O-ring seals, correspondingly, need on the cover board process one groove; Yet the utility model application sealing gasket, there is no need on the cover board machined grooves, thereby has reduced the manufacturing procedure of cover plate, and has reduced cost.In addition, in prior art, in order to prevent that screw from losing in unloading process, need to add separately an O-ring seals that diameter is less at each tip of screw, this is not easy to operate; In the utility model, the through hole passing for securing member be arranged on sealing gasket originally with it, by contrast, operating process is easier, and securing member is also difficult for loss.
3, screw of the present utility model only has one section of bottom to be processed with screw thread, and mid portion is cylinder, compares like this with the screw of prior art, and the course of processing is simplified relatively, and can reduce costs.And the screw of cover plate assembly of the present utility model can greatly reduce the wearing and tearing to sealing gasket, improved the life-span of sealing gasket.
Accompanying drawing explanation
In order to explain the utility model, its illustrative embodiments will be described with reference to the drawings hereinafter, in accompanying drawing:
Fig. 1 shows a kind of logic switch of prior art, and it comprises cover plate assembly;
Fig. 2 shows the upward view of cover plate of the cover plate assembly of Fig. 1;
Fig. 3 shows logic switch of the present utility model, and it comprises cover plate assembly;
Fig. 4 shows the upward view of cover plate of the cover plate assembly of Fig. 3; And
Fig. 5 shows the screw end view of the cover plate assembly of Fig. 3.
Similar features in different figure is indicated by similar Reference numeral.
Embodiment
In the detailed description of following execution mode, with reference to the accompanying drawing that forms a part for this description, describe.Accompanying drawing shows specific execution mode in the mode of example, and the utility model is implemented in these execution modes.Shown execution mode is not for limit is according to all execution modes of the present utility model.The execution mode that is appreciated that other can be utilized, and change structural or logicality can be made under the prerequisite that does not depart from scope of the present utility model.For accompanying drawing, the term of directivity, such as D score, " on " etc., with reference to the orientation of described accompanying drawing using.Because the assembly of execution mode of the present utility model can be implemented with multiple orientation, these directional terminology are the objects for illustrating, rather than the object of restriction.Therefore, following embodiment is not the meaning as restriction, and scope of the present utility model is limited by appending claims.
As shown in Figure 3-Figure 5, it shows respectively a kind of securing member 206 of the cover plate assembly 22 of logic switch 20 of the present utility model, the cover plate 202 of cover plate assembly 22 and cover plate assembly 22.Wherein, this cover plate assembly 22 comprises:
Securing member 206, it is through described cover plate 202 and described sealing gasket 204 and described sealing gasket 204 is abutted on the butting surface 241 of housing 24 of described logic switch, thus by described cover plate 202 Fluid Sealings be fixed on the housing 24 of described logic switch 20.
Particularly, this cover plate 202 can be by forming through die drawn such as Al-alloy metal, and the edge 202b of cover plate 202 can bend and form.As shown in the figure, this cover plate 202 is roughly square, in four bights, has all carried out chamfering.In addition, in four bights of cover plate 202, be equipped with through hole 202d.
Thereby the top edge of outer wall of the housing 24 of logic switch 20 is lived in the edge 202b imbrication that the edge 202b of cover plate 202 extends cover plate 202 when cover plate 202 is fixed on the housing 24 of logic switch 20 along the outer wall of the housing 24 of logic switch 20.By this, when this cover plate 202 is connected to housing 24 hermetically, the edge 202b of cover plate 202 has surrounded the top edge of the outer wall of these housing 24 opening parts completely,, sealing surfaces between the composition surface 202c of cover plate 202 and the butting surface 241 of housing 24 has been covered completely by the edge 202b of cover plate 202, therefore, rainwater can slip down along the edge of this cover plate 202 and can not penetrate in housing 24 along the sealing surfaces of cover plate 202 and housing 24.Therefore this cover plate 202 can improve sealing, especially can reduce widely especially entering of rainwater of dust.Further, by drawing die, form with respect to existing casting forming and can also reduce widely die sinking cost.
Due to the sealing gasket 204 of having applied on this composition surface 202c that is routed to cover plate 202, therefore there is no need on the cover board to offer groove in order to coordinate O-ring seals as prior art, this has reduced the manufacturing procedure of cover plate, and has reduced cost.In addition, owing to 204 of sealing gaskets, through hole being set with it, therefore need to put separately a more very little O-ring seals of diameter at each tip of screw unlike prior art, to prevent screw, in unloading process, lose.Like this, prevent that when screw from losing in unloading process, being also easier to user operates.
Securing member 206 can be screw or bolt.At this, this securing member 206 is screw, and this screw has the 206b of bar portion of head 206a and the vertical extension of 206a from the head.Particularly, the described bar 206b of portion has the non-threaded part 206b1 of close head 206a and away from the threaded portion 206b2 of head 206a, wherein, the length of non-threaded part 206b1 is greater than the common thickness of described cover plate 202 and sealing gasket 204.By this, when cover plate 202 being fixed on to housing 24 with this screw, this screw can pass the through hole 202d of cover plate 202 and the through hole 2041 of sealing gasket 204 successively, is then threaded onto on the screwed hole on housing 24.And; because the length of the non-threaded part 206b1 of the 206b of bar portion of this screw is greater than the gross thickness of cover plate 202 and sealing gasket 204; therefore the upper part in the hole of housing 24 is without tapping; like this; can greatly reduce the Butt sealing surface of housing 24 and the frictional force between screw, thereby virtually protect the sealing butting surface of housing 24 to increase the life-span of housing 24.In addition, compare with common screw, because this screw only need to be in a bit of tapping of bottom, therefore thereby relative simplification of processing can reduce costs.
The those skilled in the art of those the art can, by research specification, disclosed content and accompanying drawing and appending claims, understand and implement other changes of the execution mode to disclosing.In the claims, word " comprises " element and the step of not getting rid of other, and wording " one " is not got rid of plural number.In the practical application of utility model, a part may execute claims the function of middle quoted a plurality of technical characterictics.Any Reference numeral in claim should not be construed as the restriction to scope.
The utility model is limited to the illustrative embodiments presenting in specification and accompanying drawing never in any form.Within all combinations of the execution mode that illustrates and describe (part) are interpreted as clearly and are incorporated to this specification and be interpreted as clearly and fall in scope of the present utility model.And in the scope of the present utility model of summarizing as claims, a lot of distortion are possible.In addition, any reference marker in claims should be configured to limit scope of the present utility model.
Claims (7)
1. a cover plate assembly for logic switch, is characterized in that, described cover plate assembly comprises:
Cover plate, it has smooth base portion and around described base portion and from the vertically extending edge of described base portion, described base portion defines composition surface in described edge;
Sealing gasket, the composition surface of its shape and described cover plate is suitable roughly to cover described composition surface; And
Securing member, it is through described cover plate and described sealing gasket and described sealing gasket is abutted on the butting surface of housing of described logic switch, thereby by described cover plate Fluid Sealing be fixed on the housing of described logic switch.
2. cover plate assembly according to claim 1, it is characterized in that, thus the edge of described cover plate along the outer wall of the housing of described logic switch, extend when described cover plate is fixed on the housing of described logic switch described in the imbrication residence, edge of cover plate state the top edge of outer wall of the housing of logic switch.
3. cover plate assembly according to claim 1, is characterized in that, described cover plate is roughly square.
4. cover plate assembly according to claim 1, is characterized in that, described cover plate is formed by stretching.
5. cover plate assembly according to claim 3, is characterized in that, described sealing gasket is square.
6. cover plate assembly according to claim 1, is characterized in that, described securing member is screw.
7. cover plate assembly according to claim 6, it is characterized in that, the bar portion that described screw has head and vertically extends from the head, described bar portion has the non-threaded part of close head and away from the threaded portion of head, wherein, the length of described non-threaded part is greater than the common thickness of described cover plate and sealing gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320449330.XU CN203445021U (en) | 2013-07-25 | 2013-07-25 | Cover plate assembly of logic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320449330.XU CN203445021U (en) | 2013-07-25 | 2013-07-25 | Cover plate assembly of logic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203445021U true CN203445021U (en) | 2014-02-19 |
Family
ID=50096047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320449330.XU Expired - Lifetime CN203445021U (en) | 2013-07-25 | 2013-07-25 | Cover plate assembly of logic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203445021U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383900A (en) * | 2013-07-25 | 2013-11-06 | 恒丰赛特实业(上海)有限公司 | Cover plate assembly of logic switch |
-
2013
- 2013-07-25 CN CN201320449330.XU patent/CN203445021U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383900A (en) * | 2013-07-25 | 2013-11-06 | 恒丰赛特实业(上海)有限公司 | Cover plate assembly of logic switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |
|
| CX01 | Expiry of patent term |