SK115493A3 - Fastener assembly for telephone housing and substrate - Google Patents

Abstract

A fastener (100, 200, 300) for fastening at least two tandemly-positioned surfaces (106, 206) such as opposing surfaces of a housing assembly, theretogether. The fastener includes first (100) and second (200) hook members which are affixed in a defined relationship with top (106) and bottom (206) surfaces which are to be affixed theretogether. A clip (300) formed of a multi-slotted plate member (306, 312) having slotted openings (318, 330) of dimensions corresponding to the dimensions of the hook members, and hence, the top and bottom surfaces theretogether. By affixing the clip (300) to a substrate (344) positioned between the top and bottom surfaces, the single clip (300) may be utilized to fasten the substrate (344) in position between the top (106) and bottom (206) surfaces.

Description

Clamp assembly

Technical field

This application is a partial continuation application of the registration number 799,818 filed .29. Jeffery F. Kurgan, entitled Apparatus For Accepting And Retaining A Smart Card.

The present invention relates generally to clamps, and in particular to clamps that clamp two or more tandem surfaces together, such as, but not limited to, opposing faces of the housing assembly for electronic devices.

The state of the art

Advances in the field of radioelectronics have allowed the launch and commercialization of the ever expanding field of radio communication equipment. Advances in the design of electronic circuits have allowed further miniaturization of the electronic circuits that make up these radiocommunication equipment. As a consequence of the ever expanding field of radio communication devices, which consist of ever-decreasing electronic circuits, it is possible to use these radio communication devices more conveniently in an increasing number of applications.

A radio transceiver, such as a radiotelephone used in a cellular communication system, is one example of a radio communication device that has been miniaturized for convenient use in an increased number of applications. Continued miniaturization of electronic circuits is currently underway. Further such miniaturization of radio transceivers, as well as other radio communication equipment, will further enhance the convenience of using such equipment and allow for an increase in the number of applications.

In accordance with this effort to further miniaturize the electronic circuits of such radio transceivers (as well as other radio communication dimensions of the electronic circuits of the circuits).

equipment) appears to be scaling down the critical objectives of designing such

The ongoing miniaturization of the electronic circuitry is accompanied by a corresponding reduction in the physical dimensions of the housings in which the electronic circuitry is incorporated, as well as the other mechanical structures associated therewith.

Initially, the reduction of the size of the covers and associated mechanical structures was accompanied by a simple reduction of existing structures. However, after some size reduction, such simple size reduction becomes impractical. Beyond a certain point, account must be taken of the structural constraints of the constituent materials of such structures with regard to their structural integrity. For example, housings of many electronic devices consist of thermoplastic materials. The walls of these covers must be thicker than the minimum thickness to ensure the structural integrity of the walls and covers they constitute. Covers and related mechanical structures made of other materials also suffer from a similar reduction in size.

Many conventional housing designs are formed by a front portion and a rear portion of the housing. Typically, the electronic circuitry constituting the electronic device is disposed on the printed circuit board (or several printed circuit boards) and the printed circuit board is embedded or otherwise attached to the rear of the housing in a conventional housing design. After fastening in the corresponding position, the front part of the cover is placed and the coupling mechanism is connected frontally and thereby closed with the supporting effect of the cover structure.

above the printed circuit board and the back of the cover together the printed circuit board inside

The fastening mechanism by which the front and rear portions of the housing structure are joined together may consist of any of a number of designs. The easiest way is to use screws that connect the housing parts together. Also, especially when the housing structure is formed of thermoplastic materials, the fastening mechanism may form an integral part of the side wall edge of the respective housing portion.

However, due to the aforementioned shrinking of the dimensions of the enclosures of many electronic devices, existing fastening mechanisms for joining parts of such enclosures together cannot be used when the enclosure dimensions are reduced below a certain limit.

Also, further improvements, both of electronics and of mechanics, are in fact increasingly included in the designs of such electronic devices. These additional improvements provide these electronic devices with additional features that enhance the convenience of their use. Incorporating these improvements into electronic devices even becomes a problem for further progress in design objectives in reducing the dimensions of enclosures and other mechanical structures of electronic devices. The design of fastening mechanisms that connect opposing parts of the housing structure together therefore becomes an increasing problem when more structures are to be incorporated into ever shrinking housings.

With particular reference to radio transceiver devices comprising a cellular radiotelephone described in the aforementioned patent application, the structure is referred to as a card reader assembly. Such a design built into the radiotelephony housing allows the acceptance of cards of substantially similar dimensions to conventional credit cards. The card contains information that, when received by a card reader, can be used by the radiotelephon for many different purposes. For example, the information contained in such a card could include an identification number usable for billing purposes for telephone calls made by radiotelephony to individual billing addresses. Because the card contains an identification number, it can be moved from one radiotelephone and placed in another and calls can be billed to a single billing address.

Such a card reader assembly, incorporated as part of the radiotelephone, must be built into the radiotelephone housing assembly in the correct orientation. Also, the cover assembly must be adapted to allow the sensor assembly to receive cards and capture the required information from them. In other words, the card reader assembly must be accessible from outside the cover assembly. For proper placement of the card reader assembly within the cover assembly, the card reader assembly must be secured to the cover assembly to thereby secure the card reader assembly in position and the desired orientation thereby allowing access to the card reader from outside the cover assembly.

The assembly having the top of the clamp engaging portions of the housing, the housing formed by the front portion must have the mechanism in place with the securing and rear portions to be joined together by a corresponding position along forming the interface between the two structural integrity of the housing assembly.

Such a clamping mechanism which connects the front and rear portions of the housing together must therefore be located in the empty spaces along the contact surfaces between the two housing portions.

As the physical dimensions of the covers and other mechanical structures of the radiotelephony continue to decrease, care must be taken in designing the radiotelephony to ensure that, as a clamping mechanism that connects the card reader assembly (or any other substrate) located inside the housing assembly to such a housing assembly. the clamping mechanism that connects the front and rear portions of the housing assembly together could both be conveniently positioned in a non-obstructing relationship.

Because the physical dimensions of the radiotelephony in which it is housed in the non-obstructing housing assembly are reduced, the proposal to be such a clamping mechanism arrangement becomes increasingly difficult. Since the thickness of the cover surfaces and side walls is reduced to a minimum thickness, as previously mentioned, conventional fixtures cannot be used because the channels previously fixed in the cover structure to receive the fixture of the desired thickness can no longer be used. Therefore, the constraints in the types of clamping mechanisms that can be used to connect the card reader assembly (or, again, any substrate) in a position within the housing assembly are the same as the aforementioned clamping mechanism constraints that connect the front and rear of the assembly. cover together.

Therefore, what is needed is a fixture with minimal dimensions that connects two surfaces together.

What is additionally needed is a fixture which not only connects the two surfaces together, but additionally also fixes the substrate between such two surfaces.

SUMMARY OF THE INVENTION

Therefore, the present invention advantageously provides a minimum size clamp for joining two tandem spaced surfaces together.

The present invention further preferably provides a fixture for joining the substrate between two tandem-positioned surfaces.

Still further preferably, the present invention provides a fixture that connects two tandem-positioned surfaces and a substrate disposed between them.

The present invention provides further advantages and features whose details will become more apparent when reading a detailed description of a preferred embodiment of the invention as set forth below.

Accordingly, in accordance with the present invention, there is provided a fixture for joining a first surface and a tandem-positioned second surface.

The fixture includes a first hook member positioned below the first surface in a fixed relationship to the surface and a second hook member positioned above the second surface in a fixed relation thereto. A buckle allowing connecting the two components, the first hook member and the second hook member to be coupled, is disposed around the two members, the first hook member and the second hook member, thereby allowing the first surface and the tandem positioned second surface to be joined together.

Description of the drawings

For better understanding, the present invention is illustrated by the following drawings, in which:

Fig. 1 is a cutaway, isometric view of a hook portion forming part of a fixture of the preferred embodiment of the present invention.

Fig. 2 is a cut-away, isometric view similar to FIG. 1, but showing another hook portion forming another portion of the fixture of the preferred embodiment of the present invention.

Fig. 3 is an isometric view of a clip attached to a substrate that forms another portion of a fixture of the preferred embodiment of the present invention.

Fig. 4 is a cut-away, isometric view of the clip of FIG. 3 disposed here between the front and rear portions of the housing assembly of the housing within which the hook portions of FIGS. 1 and 2 are formed on the side walls of the front and rear portions of the housing.

Fig. 4-1 is a cutaway, isometric view similar to FIG. 4 but as a second option of the present invention.

Fig. 5 is a cut-away, isometric view, as in FIG. 4, but showing a clip when coupled to a hook portion formed on a side wall of the front of the housing.

Fig. 6 is a cut-away, isometric view similar to that of FIGS. 4-5 but showing the relationship between the hook portion and the buckle after joining the two hook portions formed on the side wall of the front cover portion and the hook portion formed on the rear cover portion of the cover assembly thereby connecting the front and a rear portion of the housing at that location while clamping the substrate in position within the housing assembly thus formed.

Fig. 7 is a section along line 7-7 of FIG

Fig. 8 is a broken away view of a radiotelephone in a preferred embodiment of the present invention which includes a fixture shown in the preceding drawings;

Fig. 9 is an isometric view of a portion of the card reader assembly shown in FIG. 8 forming a substrate to which the clip shown in FIG. 3 is attached in a preferred embodiment of the present invention; and

Fig. 10 is an isometric view of the radiotelephone shown exploded in FIG. 8.

DETAILED DESCRIPTION OF THE INVENTION

In the isometric view of FIG. 1, a hook member 100 is shown which forms part of a fixture of the preferred embodiment of the present invention.

The hook member 100 is formed at a predetermined distance below the surface 106, here the upper, front face of the top of the cover assembly of the cover assembly. As shown, the hook member 100 is formed on the inner wall of the skirt forming the side wall 112 of the front of the housing assembly.

The hook member 100, in a preferred embodiment, is a resilient material and is formed of the hook portions 100-1, 100-2, 100-3.

Adjacent hook portions of the hook member are separated from each other by gaps 100-4, 100-5, whereby this member 100 therefore has a ridge appearance. Hooked branched. The hook member 100 may also be formed as a single elongated hook portion; however, such a fork structure is preferable when the hook member 100, the surface 106 and the side wall 112 are formed of a thermoplastic material during the molding process. Such a branched construction prevents scaling of thermoplastic material of varying thickness, and is preferably applicable when the smooth appearance of the rear face of the side wall 112 (not shown in the figure) is important.

Each hook portion 100-1-3 includes an ascending elongated inclined face, designated herein by numbers 118-1, 118-2, 118-3. The end faces are in fact coplanar, and each end face 118-1-3 extends to the tulle edge, the force transmitting surface, designated herein by reference numerals 124-1. 124-2 and 124-3. The force transmitting surfaces 124-1-3 also form coplanar surfaces.

In another isometric view of FIG. 2, a second hook member, generally indicated at 200, is shown to form a second portion of the fixture according to a preferred embodiment of the present invention.

The hook member 200 is formed at a predetermined distance above the surface 206, which here is the lower front surface of the rear portion of the cover assembly of the cover assembly. As shown, the hook member 200 is shaped as an extension beyond the inner wall of the skirt forming the side wall 212 of the rear of the housing assembly. The hook member 200, the surface 206 and the side wall 212 of the rear of the housing assembly is best formed as a whole when molded from a thermoplastic material. In contrast to the hook member 100 of FIG. 1, the hook member 200 is not of a branched construction, but the hook member 200 may otherwise also be constructed in a branched form. Analogous to the portions 118-1-3 of the hook member 100 in Fig. 1, the hook member 200 consists of an inclined face plate 218, which in this case, however, extends downwardly. The faceplate 218 extends to the tulle, pressure-transmitting face 224.

Fig. 3 is a cutaway, isometric view of the clip, designated herein by the number 300, which constitutes another portion of the fixture of the preferred embodiment of the present invention. As shown, the clip 300 is a multi-slot flat member having an upper slot portion 306 and a lower slot portion 312. The slot opening 318 extends between the front and rear face plates of the upper (rear face plate 324 shown in the figure) of the upper slot portion 306. 330 extends between the front and rear face plates (rear face plate 336 shown in the figure) of the lower slit portion 312.

The inner edge of the surface 326 of the upper slot portion 306 defines one of the peripheral sides of the slot opening 318. Analogously, the inner edge of the surface 338 of the bottom slot portion 312 defines one of the peripheral sides of the slot opening 330.

The clip 300 is attached to the substrate 344 and extends substantially perpendicular to the plane defined by the substrate surface. In a preferred embodiment, and as will be fully noted below, the substrate 344 forms part of a card reader and is made of a metallic material. The clip 300 is preferably integral with the surface of the substrate 344 and is also metal. The clip 300 allows for elastic deformation and allows bending of the clip parts. While in a preferred embodiment the upper slot portion 306 and the lower slot portion 312 extend parallel, but in different planes, the upper and lower slot portions 306 and 312 may, as a further option, be formed non-parallel to each other.

Fig. 4 is a cutaway, isometric view of the clip 300 associated with the substrate 344 of Fig. 3, wherein the substrate 344 and the clip are additionally disposed between the upper front surface 106 of the front of the housing assembly shown in Fig. 1a. 2 of the housing assembly shown in FIG. The hook member 100 is again shown as an extension beyond the inner wall of the skirt forming the side wall 212 of the front of the housing assembly.

When the top and bottom opposing surfaces 106 and 206 are tandem arranged as shown, allowing inter-installation connections therebetween, the hook members 100 and 200 are aligned with respect to each other in a vertical arrangement. The linear displacement of the substrate 344 locates the clip 300 associated therewith by aligning it with the hook member 100 and the hook member 200.

It has been mentioned that the dimensions of the slot opening 318 coincide with the peripheral dimension of the hook member 100 and the dimensions of the slot opening 330 coincide with the peripheral dimensions of the hook member 200.

Of course, it will be understood that the hook member 100 and 200 need not be aligned side by side. In this case, the hook members 100 and 200 must be aligned with the slotted openings to engage the upper and lower slotted openings of the buckle portions 306 and 312. Fig. 4-1 illustrates other embodiments of the present invention in which the hook members 100 and 200 are mutually offset. The buckle 300 consists of an upper and a lower slit portion, which are respectively displaced relative to each other and allow alignment with the corresponding hook members. Another construction shown in Fig. 4-1 is identical to the equally numbered construction described in Fig. 4 and will not be described in detail again.

In a first application of the present invention, a fixture according to a preferred embodiment allows the front and rear portions of the housing assembly to be joined together. In such use, the substrate 344 allows the clip 300 to be positioned in an aligned configuration between the hook members 100 and 200. In such a use, the clip 300 could, of course, also be otherwise positioned and suitably aligned by other suitable means.

In a further use of the present invention, the fixture of the preferred embodiment makes it possible not only to connect the front and rear portions of the cover assembly, but also to attach the substrate, here the flat member of the card reader assembly, in position within the cover assembly thereby formed. Preferably, although not first with the hook member 100 with the hook member 200, and inevitably, the clip 300 is joined and then the clip 300 is joined to connect the surfaces 106 and 206 of the front and rear of the housing assembly together.

Accordingly, when the buckle 300 is inserted between the hook members 100 and 200, the buckle 300 is displaced vertically in the direction indicated by the arrow 348 and thus the front portion of the upper slot portion 306 of the buckle 300 abuts against and joins with the inclined face of portions 118-1-3 of portions of the hook member 100-1-3. This adjacent connection between the end surfaces 124-1-3 of the hook member 100 and the front face of the upper slot portion 306 of the buckle 300 causes spring forces acting against the buckle 300. The application of this elastic force causes elastic deformations of the upper slot portion 306 resulting in bending of the upper slot portion. . It should also be noted that when the cover is made of a thermoplastic material, it flexibly responds to the progressive movement of the clip 300.

The successive movement of the clip 300 results in the engagement of the slot opening 318 and the inclined face of the parts 118-1-3. When they engage, the front plates 118-1-3 of the hook portion 100 no longer touch against the front plate of the upper slot portion 306; because the hook member 100 is disposed through the slot opening 318. Because the bending force stops acting against the upper slot portion 306, the upper slot portion 306 resiliently returns to its original undeformed state, and the buckle 300 snaps in position around the hook member 100 and thus the inner edge 326. engages against a rearwardly angled, force-transmitting surface of the 124-1-3 hook member portions.

5 is an isometric view of FIG. 5 showing the position of the buckle 300 after just described buckle displacement, the location of the slot portion 306, the buckle, around the hook member 100, the inner edge of the surface 326, the upper slot portion 306 resting on the force transfer pads 124-1-3 member. When so positioned, the surface 344 is joined in a desired relationship to the top, relative to the surface 106, of the front of the housing assembly.

Once the buckle 300 has been suitably coupled to the hook member 100 and abuts against the force transfer pads 124-1-3, the buckle 300 along with the surface 106 can be moved downward to a position where it snaps into the hook member 200. (Or, the rear surface 206) parts of the housing assembly can be moved to snap into the clip 300.)

The sliding movement of the lower slotted portion 312 along the downwardly extending angled surface 218 of the hook member 200 (in a manner analogous to the sliding movement of the front face of the upper slotted portion 306 causing the upper slotted portion to bend) causes flexural forces acting on the lower slotted portion the deformation and bending of the lower slit portion 312.

Continued displacement of the lower slot portion 312 of the clip 300 causes the slot opening 330 to align with the sloping face of the portion 218. After joining, the face surface 218 of the hook member 200 no longer leans against the face of the lower slot portion 312 because the hook member 200 is located in the slot opening 330. Since the bending forces no longer act against the lower slit portion 312, the lower slit portion 312 resiliently returns to the undeformed state, the clip 300 snaps in position around the hook member 200 so that the inner edge of the plate 338 abuts against the rearwardly bent force transmitting plate 224.

The cut, isometric view of FIG. 6 shows the relationship between the buckle 300 and the hook member 100 and 200 when the buckle 300 is placed around the hook members. Block 350 shown in the frame surrounding the hook member 100, hook member 200, and buckle 300 is a fixture formed of hook members 100, 200 and buckle 300.

As mentioned above, in a first application of a fixture 350 of a preferred embodiment of the present invention, the fixture is used to connect two tandem-positioned surfaces, here the surfaces 106 and 206 of the front and rear of the housing assembly together. In another application of the gripper 350, the gripper additionally allows to locate a substrate, here a substrate 344 that forms part of the card reader assembly clamped at a position between the upper and lower faces of surfaces 106 and 206.

Since the channel formed in the side walls 212 or 312 is not required to connect the hook members 100 and 200 in a switching connection, the thickness of the ribs forming the side walls 212 and 312 may be minimal. In addition, when a single clip is used attached to the substrate as shown in the previous drawings, the single clip can be used to hold three faces (i.e.

surfaces 106, 206 and substrate 344) in a desired manner.

arrangement between

Again, it is shown 300, which together is shown to widen the skirt by members 100, 200, and buckle

Again, the hook member 100 of the wall 112 formed as

Fig. 7 is a cross-sectional view taken along line 7-7 of Fig. 6.

the hook relationship 350 forms an inner side underneath the top surface 106 of the front of the housing assembly. And, the hook member 200 is shown to form a protrusion inwardly from a side wall 212 formed from a flange portion extending above the bottom surface 206 of the rear portion of the housing assembly. The side walls 112 second in a suitable connection with each other, a multi-slit flat member extending portions of its edge in a plane substantially formed by the substrate 344.

and 212 abut one on Clip 300 is formed as below the substrate 344, perpendicular to the planar surface to

The slot opening shaped so that the slot portion of the buckle 300 allows the hook member 100 to overlap. Similarly, the overlapped bottom slit member overlapped over the top to be shaped over it so that 300, allowing the hook 200 to overlap over it. Therefore, the top and bottom face plates 206 are joined together by snapping the clip 300 into the hook 100 and 200. No grooves need to form a portion of the clip along the slot opening.

106 and side wall portions 112 or 212, thereby allowing the thickness of these side walls to be minimized.

Continuing with FIG. 8, the radio transceiver, here portable cellular radiotelephone, designated 460, is shown in exploded form. The radiotelephone 460 includes a housing support assembly for securing various radiotelephone components inside. The top portion 506 of the housing assembly includes flange portions extending around peripheral portions forming side walls including side wall 512. Side wall 512 coincides with side wall 112 of the preceding figures, and includes a hook member (not shown) formed on its inner wall.

The rear housing assembly portion 606 also forms the housing assembly portion including a skirt portion formed around the peripheral portions that form the side walls, including the side wall 612. The side wall 612 coincides with the side wall 212 of the preceding figures, and includes a hook member (in this figure) (not shown) created as an extension beyond its inner wall.

Directly beneath the front of the housing assembly 506 is a keypad 618, and directly below the keypad electronics board 620. The card reader assembly components 624 are located below the keypad electronics board 618.

The card reader assembly shown consists of a slider plate 630 and a cover plate 636. Formed perpendicular to the planar cover surface 636 as an extension thereof and integral therewith, the clip member 700. The clip 700 coincides with the clip 300 shown in the preceding figures, and allows connection with hook members formed as extensions beyond the inner walls of the side walls 512 and 612. The electronics board 706 is located below the cover plate 636 of the card reader assembly. Antenna 712, as further shown, extends beyond the electronics board 706.

When properly aligned, the radiotelephony elements 460 are disposed one on top of the other and covered between the front and rear portions of the housing assembly 506 and 606, which are tandem arranged and connected together by the fixture of the present invention, by clip connection 700.

Fig. 9 is a view of the cover plate 636 itself that forms part of the card reader assembly that is incorporated within the radiotelephone 460 of Fig. 8. The cover plate 636 includes two clips 700 disposed on opposite edges of the cover plate. The clips 718, also shown in the drawing, are located on opposite edges of the cover plate 636. The clips 718 consist of simple slit portions similar to the upper slit portion 306 of the preceding figures, and allow the simple hook members to be attached to the cover plate 636 located on portions of the cover assembly. , in this case, at the front of the housing assembly 506.

Fig. 10 is an isometric view of the radiotelephone 460 of Fig. 8. The radiotelephone 460 consists of a front and a back of the cover assembly 506 and 606, a keyboard 618, and an antenna 712. The extension of the cover assembly 730 rotatably attached to the front of the cover assembly 506 forms the radiotelephone keypad cover. the surface between the side walls of the cover assembly. The opening 736 allows the card to be inserted in and allows the card to be received by the card reader shown in the previous drawing.

While the present invention has been described in conjunction with a preferred embodiment, as shown in the various drawings, it should be understood that other similar solutions may be used, and modifications and additions to the disclosed solution may be practiced to allow the same function of the present invention without departing from the idea. invention.

Therefore, the present invention should not be limited to simpler solutions, but rather should be interpreted in width and scope according to the appended claims.

Claims (7)

PATENT CLAIMS A fixture for joining a first surface (106) and a tandem-positioned second surface (206) together, said fixture comprising: means forming a first hook member (100) positioned below the first surface (106) in a fixed relationship thereto; means forming a second hook member (200) positioned above the second surface (206) in a fixed relationship thereto; clip forming means (300) for snap-fit connection with the two aforesaid first hook member (100) and second hook member (200); means for locating said clamping means (300) around both the first hook member (100) and the second hook member (200), allowing the first surface (106) and the second tandem positioned surface (206) to be joined together. The clamp of claim 1, wherein the first hook member (100) further comprises an upwardly extending angled face (118) leading to a rearwardly angled, force-transmitting face (124). The gripper of claim 1, wherein the second hook member (200) further comprises a downwardly extending angled face (218) leading to a rearwardly angled, force-transmitting face (224). The clamp of claim 3, wherein the clip forming means (300) comprises a slotted flat member having an upper slotted portion (306) and a lower slotted portion (312), respectively, both upper and lower slotted portions (306,312), respectively, defining slotted holes (300). 318,330) with dimensions suitable for receiving the first hook member (100) and the second hook member (200), respectively, into each other. The fixture according to claim 1, wherein the upper slotted portion (306) which allows bending corresponding to the elastic actions during sliding of the upper slotted portion (306) on the inclined face (118) of the first hook member (100) ), for positioning the upper slot portion (306) around the first hook member (100), wherein the first hook member (100) extends through the slot opening (318) and the inner edge of the surface of the upper slot portion (306) abuts against a rearwardly bent force transmitting a flat (124) of the first hook member (100). The clamp of claim 5, wherein the lower slit portion (312) is formed by a material that allows bending corresponding to the elastic forces exerted upon them by sliding the lower slit portion (312) onto the inclined face (218) of the second hook member (200). for positioning the lower slit portion (312) around the second hook member (200), wherein the second hook member (200) extends through the slit opening (330) and the inner edge surface of the lower slit portion (312) abuts against the rearwardly angled, force transmitting flat (224) a second hook member (200). The fixture of claim 1, wherein the positioning means comprises a substrate positioned between the first and second surfaces in a known relationship with the clip forming means maintained in fixed connection with the substrate, and such positioning the substrate in a known relationship with the position of the first and second surfaces. a buckle in position around the first hook member and the second hook member.