CN211818664U

CN211818664U - Window fastener

Info

Publication number: CN211818664U
Application number: CN201922202961.1U
Authority: CN
Inventors: 布赖斯·艾伦·莫洛伊; 刘易斯·约瑟夫·艾萨克森
Original assignee: Assa Abloy New Zealand Ltd
Current assignee: Assa Abloy New Zealand Ltd
Priority date: 2018-12-13
Filing date: 2019-12-10
Publication date: 2020-10-30
Anticipated expiration: 2029-12-10
Also published as: AU2019101758A4; JP3225681U; AU2019279980A1

Abstract

A window fastener comprising: a base; a handle configured to rotate relative to the base; and a friction member; wherein the friction member is configured to resist rotation of the handle relative to the base. By this arrangement, the window fastener is more reliable.

Description

Window fastener

Technical Field

The present application relates to a window fastener.

Background

The window fastener has a handle operable to allow opening and closing of the window. A tongue on the handle engages the frame to hold the sash in place. When the handle is operated, the handle is rotated so that the tongue no longer engages the window frame. The sash may then be pushed to open the window.

However, there are situations where existing window fasteners are not entirely suitable.

SUMMERY OF THE UTILITY MODEL

In one exemplary embodiment, there is provided a window fastener including: a base; a handle configured to rotate relative to the base; and a friction member; wherein the friction member is configured to resist rotation of the handle relative to the base.

Further, the friction member is configured to resist rotation of the handle relative to the base caused by the weight of the handle.

Further, the friction member is configured to resist at least 2.5Nm of torque and/or resist less than 5Nm of torque.

Further, the friction member is a pad.

Further, the friction member is configured to be compressed between the base and the handle.

Further, the friction member includes a recess configured to receive a boss of the handle.

Further, the friction member is mounted to the handle.

Further, the base includes a recess configured to receive the friction member.

Further, the friction member is located in a recess configured to limit expansion of the friction member.

Further, the restriction of the recess causes the friction member to press against the base to resist rotation of the handle relative to the base.

Further, the friction member includes one or more structures configured to engage with a corresponding surface of the base.

Further, the friction member is made of a plastic material.

Further, the plastic material is one of a thermoplastic elastomer, nylon, and acetal.

Further, the window fastener also includes a second friction member, wherein the second friction member is configured to resist rotation of the handle relative to the base.

Further, the second friction member is configured to be compressed between the base and the head of the window fastener.

Further, the second friction member has a first recess configured to receive a boss of the handle and a second recess configured to receive a head of a screw.

Further, the base is configured to be mounted to a window sash.

By this arrangement, the window fastener is more reliable.

Drawings

The invention will be described by way of example with reference to the accompanying drawings, which show various preferred embodiments of the invention. However, these are for illustration only, and the invention is not limited to the specific details of the drawings and the corresponding description.

FIG. 1 is a front perspective view of a fastener.

Fig. 2 is a rear perspective view of the fastener of fig. 1.

Fig. 3 is an exploded view of the fastener of fig. 1.

Fig. 4 is a rear perspective view of the handle.

FIG. 5 is a front perspective view of the first friction member.

Fig. 6 is a front perspective view of the base.

Fig. 7 is a rear perspective view of the base of fig. 6.

FIG. 8 is a perspective view of the second friction member.

Detailed Description

In some embodiments, the window fastener has at least one friction member that resists rotation of the handle relative to the base. The friction member may be adjusted for a particular friction level. The frictional force may be sufficient to resist rotation of the handle relative to the base caused by the weight of the handle. This may mean that the friction member resists a torque of between about 2.5Nm and about 5 Nm.

More generally, window fasteners may be used to lock the window in the closed position. One or more handle operated window fasteners are mounted on the window sash. This may be a wedge fastener having a pivotally movable handle with a tongue for engaging a wedge element. The fastener will normally be fastened to the sash and the wedge to the frame.

The window fastener may include two spaced apart tabs. One may be a latch tab for securing the window in the closed position and the other may be a vent tab for securing the window in the vent position. These fasteners provide a level of security against unauthorized access through the window while also allowing the window to partially open to provide airflow into the building. Another form of window fastener is a wedgeless fastener. This uses a movable flap to overlap the edge of the frame when the sash is in the closed position. In many such fasteners, if the handle is not rotated sufficiently to allow the flap to rotate fully horizontally, the lower inner end of the flap may not be able to pass over the upper outer edge of the bottom side of the frame when the sash is pulled closed and may hit the frame. This can potentially damage the window frame, sash and fasteners.

In some cases, the window may be inadvertently closed. For example, if there is a gust of wind, the sash is forced towards the frame. This may result in damage to the components. In particular, if the handle is rotated so that the tongue is aligned with the window frame, the tongue may strike the outside of the window frame.

To reduce this risk, at least one friction element may be included to resist rotation of the handle relative to the base. This prevents the handle from rotating when the window is opened. Thus, if the window is suddenly closed, the handle may stay in place so that the tongue is not aligned with the window frame.

Fig. 1-3 illustrate an example of a window fastener according to one embodiment.

The window fastener has a base 100 that may be secured to the window sash. Fig. 6 and 7 show an example of the base 100. The window fastener may be mounted to the sash using one or more fasteners (e.g., screws) through holes 102 in the base 100. The head of the fastener is located in the recess 112 and is drawn towards the recess 112 to mount the base 100 to the sash. The base 100 has a central aperture 104 formed between the apertures 102.

The handle 200 provides a lever for a user to operate the window fastener. Fig. 4 shows an example of a handle. One end of the handle 200 has a boss 202 that can be used to couple the handle 200 to the base 100. The boss 202 has a fastener hole 208 for a fastener 600 (e.g., a screw) to be engaged.

In operation, a user may grasp the hand piece 206 to rotate the handle 200 relative to the base 100 and thus relative to the sash. The handle 200 rotates about the fastener 600 between a closed position and an open position. The angular movement between the closed position and the open position may be about 90 ° such that the open position has the hand piece 206 pointing vertically upward and the closed position has the hand piece 206 pointing horizontally. In the closed position, the latch tongue 210 is aligned with the window frame. When the sash is engaged in the frame, the latch tab 210 pulls the frame to secure the sash in place. In the open position, the latch tongue 210 is not aligned with the window frame and the sash may therefore be opened. The latch tongue 210 may have a latch wear surface to avoid damaging the window frame when the latch tongue 210 pulls the window frame.

The handle 200 may also have a ventilation flap 212. The ventilation tongue operates similarly to the latch tongue 210, except that the latch tongue 210 holds the sash slightly open and separated from the frame. The ventilation tongue 212 may have a ventilation button to avoid damaging the window frame when the ventilation tongue 212 pulls the window frame.

A cover 300 may be used to cover the aperture 102. The cap 300 is shaped so as not to obscure the central aperture 104 or the handle 200.

The first friction member 400 is located between the base 100 and the handle 200, and may function as a spacer. An example of a first friction member 400 is shown in FIG. 5. The central bore 402 of the first friction member 400 receives the boss 202 of the handle 200. The boss 202 of the handle 200 engages the central bore 402 of the first friction member 400. That is, the structures 204 around the outside of the boss 202 may be interleaved with the structures 404 around the inside of the central bore 402. This couples the handle 200 and the first friction member 400 such that if the handle 200 is rotated (e.g., during operation of the handle 200), the first friction member 400 rotates correspondingly with the handle 200.

The first friction member 400 may also engage the central aperture 104 of the base 100. The structure 406 around the outside of the central aperture 402 engages the structure 106 around the adjacent portion of the handle inside the central aperture 104 of the base 100. The structure 106 defines a range of rotation for the first friction member 400. That is, the first friction member 400 (and thus the handle 200) may be rotated in either direction until the structures 406 abut the corresponding structures 106. The amount of angular rotation of the first friction member 400 between the structures 106 corresponds to the angular movement of the handle 200 and may therefore be about 90 °.

The path between the two structures 406 and/or the two structures 106 may be oblique. When the handle 200 is rotated, the handle 200 moves inward and outward relative to the base 100.

The first friction member 400 may include a latch wear surface 408 coupled to the latch tongue 210.

The second friction member 500 is located between the base 100 and the head 602 of the fastener 600, and may serve as a spacer. An example of a second friction member 500 is shown in FIG. 8. The central bore 502 of the second friction member 500 receives the boss 202 of the handle 200. The boss 202 of the handle 200 engages the central hole 502 of the second friction member 500. That is, the structures 204 around the outside of the boss may be interleaved with the structures 504 around the inside of the central bore 502. This couples the second friction member 500 and the handle 200 such that if the handle 200 is rotated (e.g., during operation of the handle 200), the second friction member 500 rotates correspondingly with the handle 200 and the first friction member 400.

The second friction member 500 may also be engaged with the central aperture 104 of the base 100. The structure 506 around the outside of the central aperture 502 engages the structure 108 around the adjacent portion of the sash inside the central aperture 104 of the base 100. The structure 108 defines the range of rotation of the second friction member 500. That is, the second friction member 500 (and thus the handle 200) may be rotated in either direction until the structures 506 abut the corresponding structures 108. The amount of angular rotation of the second friction member 500 between the structures 108 corresponds to the angular movement of the handle 200 and may therefore be about 90 °.

The path between the two structures 506 and/or the two structures 106 may be oblique. When the handle 200 is rotated, the handle 200 moves inward and outward relative to the base 100.

The second friction member 500 may be located in a recess 110 in the sash adjacent face of the base 100. This allows the second friction member 500 to be flush with or slightly below the sash adjacent face of the base 100, thereby allowing the base 100 to be flush mounted to the sash.

A recess is formed in the sash adjacent face of the base 100. The recess may receive the head 602 of the fastener 600 such that the head 602 of the fastener 600 is flush with the adjacent face of the sash of the base 100. This in turn allows the base 100 to be mounted flush with the sash.

Operation of

When assembled, the fastener 600 passes through the central aperture 502 of the second friction member 500, the central aperture 104 of the base 100, and the central aperture 402 of the first friction member 400. The fastener 600 is then received and retained in the fastener hole 208 of the handle 200. Tightening the fastener 600 causes the first and

second friction members

400 and 500 to be compressed between the handle 200 and the base 100 and between the base 100 and the head 602 of the fastener 600, respectively.

First friction member 400 and second friction member 500 are at least partially formed from a material that is partially deformable under pressure. This may be a plastic material. In some embodiments, the plastic material is one of a thermoplastic elastomer, nylon, or acetal.

When the first friction member 400 is under pressure (e.g., from a fastener 600 engaged in the fastener hole 208), the first friction member 400 may be forced against the inner wall of the central hole 104 of the base 100. This restriction in outward expansion of the first friction member 400 under compression creates a frictional force that resists rotation of the first friction member 400 (and thus the handle 200) relative to the base 100.

Likewise, when the second friction member 500 is under pressure, the second friction member 500 may be forced to push against the inner wall of the central aperture 104 and/or the recess 110 of the base 100. This restriction in outward expansion of the second friction member 500 under compression creates a frictional force that resists rotation of the second friction member 500 (and thus the handle 200) relative to the base 100.

The frictional force generated by each of the first and

second friction members

400 and 500 may be configured by varying the deformability of the material and/or the size of the friction member for the respective friction member. For example, when assembling the window fastener, the greater depth (relative to the height of the structures 106, 108) of the friction member increases the compression of the friction member. Increased compression tends to result in increased friction.

The total friction force generated by the first and

second friction members

400 and 500 may be sufficient to hold the handle 200 in place. When the handle 200 is in the angled position (i.e., the hand piece 206 is not completely vertical), it will tend to fall naturally due to gravity. The friction member may be configured such that the friction force is greater than the gravitational force on the handle 200. Thus, the friction member may be configured such that at least about 2.5Nm of torque applied to the handle 200 is required to overcome the friction force. This holds the handle 200 in place until the user manipulates the handle 200.

At the same time, the friction may be low enough so that the window fastener may be easily manipulated by a user. Some users may find it difficult to rotate the handle 200 if the friction is too great. The friction member may be configured such that less than about 5Nm of torque applied to the handle 200 is required to overcome the friction force.

By configuring the first and

second friction members

400, 500 to provide a friction force within this range, the handle 200 tends to be reliably held in place without compromising the usability of the window fastener.

Further, because the frictional force is generated by the compression of the first and second

frictional members

400 and 500, the frictional force tends to be maintained in long-term use of the window fastener. That is, as long as the friction member is held under compression, a frictional force is generated. This can result in a reliable window fastener.

Description of the invention

The window fastener has been described as having a first friction member 400 and a second friction member 500, each of which contributes to the total friction force. However, in some cases, one of the friction members may be omitted. For example, the first friction member 400 alone may provide sufficient friction to resist rotation of the handle relative to the base caused by the weight of the handle.

While the present invention has been illustrated by the description of embodiments thereof, and while the embodiments have been described in detail, it is not the intention of the applicants to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details, representative apparatus and method, and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of the general inventive concept.

It is acknowledged that the terms 'comprise', 'comprising', and 'including' may, under varying jurisdictions, be attributed with either an exclusive or an inclusive meaning. For the purposes of this specification, unless otherwise indicated, these terms are intended to have an inclusive meaning-i.e. they will be taken to mean an inclusion of the listed components as it is used directly, and possibly also include other non-specified components or elements.

Claims

1. A window fastener, characterized in that the window fastener comprises:

a base;

a handle configured to rotate relative to the base; and

a friction member;

wherein the friction member is configured to resist rotation of the handle relative to the base.

2. The window fastener of claim 1, wherein the friction member is configured to resist rotation of the handle relative to the base caused by the weight of the handle.

3. The window fastener of claim 1, wherein the friction member is configured to resist at least 2.5Nm of torque and/or resist less than 5Nm of torque.

4. The window fastener of claim 1, wherein the friction member is a washer.

5. The window fastener of claim 1, wherein the friction member is configured to be compressed between the base and the handle.

6. The window fastener of claim 1, wherein the friction member includes a recess configured to receive a boss of the handle.

7. The window fastener of claim 1, wherein the friction member is mounted to the handle.

8. The window fastener of claim 1, wherein the base includes a recess configured to receive the friction member.

9. The window fastener of claim 1, wherein the friction member is located in a recess configured to limit expansion of the friction member.

10. The window fastener of claim 9, wherein the restraint of the recess causes the friction member to press against the base to resist rotation of the handle relative to the base.

11. The window fastener of claim 1, wherein the friction member includes one or more structures configured to engage with a corresponding surface of the base.

12. The window fastener of claim 1, wherein the friction member is made of a plastic material.

13. The window fastener of claim 12, wherein the plastic material is one of a thermoplastic elastomer, nylon, and acetal.

14. The window fastener of claim 1, further comprising a second friction member, wherein the second friction member is configured to resist rotation of the handle relative to the base.

15. The window fastener of claim 14, wherein the second friction member is configured to be compressed between the base and a head of the window fastener.

16. The window fastener of claim 14, wherein the second friction member has a first recess configured to receive the boss of the handle and a second recess configured to receive the head of a screw.

17. The window fastener of any of claims 1-16, wherein the base is configured to mount to a window sash.