阅读说明：本技术 一种嵌入式桌面插座及其锁紧环 (Embedded desktop socket and locking ring thereof ) 是由 贾学斌 戎毅 于 2021-08-23 设计创作，主要内容包括：本发明涉及插座领域,尤其涉及一种嵌入式桌面插座及其锁紧环。一种锁紧环,包括环体；所述该环体的内壁为圆形,环体至少其上端设有挡环；环体的内壁上构建有沿其轴线呈螺旋状的内螺旋齿和/或内螺旋槽；其特征在于：所述环体包括多个弧形构件,多个弧形构件能够首尾连接构建成环体；至少两个弧形构件为活动设置,且这两个弧形构件的自由端可拆卸连接固定。在装配时能够先将锁紧环套在被连接物体上靠近压装部位的区域,然后旋转锁紧环螺纹旋紧即可实现紧配；从而减少螺旋路径长度,拆装更为方便。(The invention relates to the field of sockets, in particular to an embedded desktop socket and a locking ring thereof. A locking ring comprising a ring body; the inner wall of the ring body is circular, and at least the upper end of the ring body is provided with a baffle ring; the inner wall of the ring body is provided with an inner spiral tooth and/or an inner spiral groove which are spiral along the axis; the method is characterized in that: the ring body comprises a plurality of arc-shaped components, and the arc-shaped components can be connected end to form the ring body; at least two arc-shaped components are movably arranged, and the free ends of the two arc-shaped components are detachably connected and fixed. During assembly, the locking ring can be sleeved on an area, close to a press-fitting part, of an object to be connected, and then the locking ring is rotated to be screwed tightly, so that tight fit can be realized; thereby reducing the length of the spiral path and being more convenient to disassemble and assemble.)

1. A locking ring comprising a ring body (1); the inner wall of the ring body (1) is circular; the inner wall of the ring body (1) is provided with an inner spiral tooth (12) and/or an inner spiral groove (13) which are spiral along the axis; the method is characterized in that: the ring body (1) comprises a plurality of arc-shaped components (10), and the arc-shaped components (10) can be connected end to form the ring body (1); at least two arc-shaped components (10) are movably arranged, and the free ends of the two arc-shaped components (10) are detachably connected and fixed.

2. A locking ring according to claim 1, wherein: when the two arc-shaped components (10) are in a disassembled state, the opening caliber formed by the free ends of the two arc-shaped components (10) is larger than the inner diameter of the ring body (1).

3. A locking ring according to claim 1 or 2, wherein: the locking ring comprises two arc-shaped members (10), one ends of the two arc-shaped members (10) are hinged, and the other ends of the two arc-shaped members (10) are detachably connected and fixed; or the two ends of the two arc-shaped components (10) can be detachably connected and fixed.

4. A locking ring according to claim 3, wherein: a free end of one of the arc-shaped components (10) is provided with a clamping hook (14), and a free end of the other arc-shaped component (10) is provided with a bayonet (15); the hook (14) is connected to the bayonet (15) in a buckling manner.

5. A locking ring according to claim 1, wherein: the outer side wall of the ring body (1) is provided with surface textures or surface structures for increasing circumferential motion friction force.

6. An embedded desktop socket comprises a socket main body (2) and a locking ring; a retainer ring (25) is arranged at the upper end part of the socket main body (2), and external thread teeth (261) and/or external thread grooves (262) are/is arranged on the outer wall of the socket main body (2) below the retainer ring (25); the method is characterized in that: a locking ring as claimed in any one of claims 1 to 5, wherein the internal helical teeth (12) and/or internal helical grooves (13) of the locking ring are capable of being threadedly connected with the external helical teeth (261) and/or external helical grooves (262) on the socket body (2) to effect axial adjustment of the locking ring relative to the socket body (2).

7. The built-in desktop socket according to claim 6, wherein: the socket body (2) is provided with a guide groove (27) arranged along the longitudinal direction, a screw rod (28) is movably arranged in the guide groove (27) along the inner circumferential direction, and the screw rod (28) is axially arranged along the groove-shaped direction of the guide groove (27); the screw rod (28) is sleeved with a clamping component (29), the screw rod (28) is meshed with threads on the clamping component (29), and the guide groove (27) limits circumferential movement of the clamping component (29).

8. The built-in desktop socket of claim 7, wherein: the socket main body (2) is provided with a hidden groove (271) communicated with the lower end part of the guide groove (27); when the clamping component (29) moves to the lower end part of the guide groove (27), the clamping component can enter the hiding groove (271) along with the rotation of the screw rod (28).

9. The built-in desktop socket according to claim 6, wherein: a decorative panel (20) is detachably connected to the upper end face of the socket main body (2), and the decorative panel (20) covers the screw head of the screw rod (28).

10. The built-in desktop socket according to claim 6, wherein: the socket main body (2) comprises a shell (21) and a plurality of power taking modules (22) arranged on the shell (21); a conductive component is arranged in the shell (21), an electric connection socket is arranged at the lower end of the shell (21), and a plurality of electricity taking grooves (24) are arranged at the upper end of the shell (21); the power connection socket is used for connecting a wiring terminal in an inserting mode, and the power taking module (22) is detachably embedded in the power taking groove (24).

Technical Field

The invention relates to the field of sockets, in particular to an embedded desktop socket and a locking ring thereof.

Background

With the continuous development of electronic devices, electronic devices such as computers and printers are applied to daily office work, but the electronic devices inevitably need to be connected with wires, a traditional office table is generally provided with a hole for a power supply wire to pass through, when the electronic devices need to be connected with a power supply, the power supply wire passes through the hole and is inserted into a power socket, and in the way, a power plug can be kicked in the office process, so that the electronic devices are suddenly turned off. In order to solve the problem, an office table with a socket arranged on a table top is provided in the market, so that the problem that a power plug at the bottom of the table can be kicked is solved. The socket is a movable desktop socket and can be manually turned, electrically turned and the like.

In the prior art, a chinese patent with reference number CN202712636U discloses a multifunctional socket, which structurally comprises a sleeve (similar to a socket main body in the present case) with an outer diameter matched with a circular threading port of an office table, wherein a circuit jack is arranged above the sleeve; the upper end part of the sleeve is provided with an outer edge extending outwards, and the lower end of the outer edge is attached to the desktop; the periphery of the lower part of the sleeve is connected with a ferrule (similar to a locking ring in the scheme) through threads, and the ferrule is connected with the sleeve from the lower part of the table top so as to fix the sleeve and the table top. This patent utilizes the current through wires mouth to install the socket on the desk, and has set up circuit connection ports such as forceful electric power socket, USB interface, net twine interface on the socket, can satisfy office staff's power consumption needs well, and makes the desk top cleaner and tidier, has also ensured power consumption safety well. But has the disadvantages that: the ferrule needs to be screwed upwards from the bottom of the sleeve, the spiral path is long, and the dismounting process is complicated. Particularly in environments where the space under the table is small, assembly is more cumbersome.

Disclosure of Invention

In order to solve the above problems, a first object of the present invention is to provide a locking ring, which can be sleeved on an area of an object to be connected near a press-fitting portion, and then screwed by rotating a locking ring thread to achieve tight fitting; thereby reducing the length of the spiral path and being more convenient to disassemble and assemble.

In order to achieve the purpose, the invention adopts the following technical scheme:

a locking ring comprising a ring body; the inner wall of the ring body is circular, and at least the upper end of the ring body is provided with a baffle ring; the inner wall of the ring body is provided with an inner spiral tooth and/or an inner spiral groove which are spiral along the axis; the method is characterized in that: the ring body comprises a plurality of arc-shaped components, and the arc-shaped components can be connected end to form the ring body; at least two arc-shaped components are movably arranged, and the free ends of the two arc-shaped components are detachably connected and fixed.

The invention adopts the technical scheme, which relates to a locking ring, wherein the inner wall of the ring body of the locking ring is provided with internal spiral teeth and/or internal spiral grooves, and the internal spiral teeth and/or the internal spiral grooves can be continuous or discontinuous; the locking ring is connected with the connected object in the center of the locking ring through threads based on the internal spiral teeth and/or the internal spiral grooves, and axial movement and positioning can be achieved based on thread matching. On the basis, the ring body in the scheme comprises a plurality of arc-shaped components, and the arc-shaped components form a ring shape in an assembling state, so that the threaded tightening or loosening can be realized; the free ends of the two arc-shaped members can be disassembled, so that the locking ring can be sleeved on the connected object from the opening of the locking ring, and then the free ends of the two arc-shaped members are connected and fixed to form a ring shape and tightly hold the connected object; similar to existing hoops.

This scheme adopts above-mentioned structure, can be earlier near the region at pressure equipment position on the object by the locking ring cover when the assembly, then rotatory locking ring screw is screwed and can be realized the tight fit. The scheme is suitable for replacing the ferrule in the embedded desktop socket in the background art, and the locking ring can be applied to other structures needing thread locking.

Preferably, when the two arc-shaped members are in a disassembled state, the free ends of the two arc-shaped members form an opening caliber larger than the inner diameter of the ring body. In the technical scheme, the opening calibers of two arc-shaped components movably arranged on the ring body are enough to install a connected object into the two arc-shaped components in an opening state, and the outer diameter of the connected object is matched with the inner diameter of the ring body in a closing state.

In a further embodiment, the locking ring comprises two arcuate members, each arcuate member being semi-circular, the two arcuate members in combination being capable of forming a ring; specifically, the following two structures can be adopted:

the structure I is that one ends of two arc-shaped components are hinged, and the other ends of the two arc-shaped components are detachably connected and fixed; two arc-shaped members of this scheme are articulated each other, can rotate, and the dismouting is more convenient.

2, the structure II is that two end parts of two arc-shaped components in the scheme can be detachably connected and fixed; the two arc-shaped members in this solution are separated from each other in the unassembled state.

In a further scheme, a buckle connection mode is adopted, so that the assembly and disassembly are more convenient. The free end of one of the arc-shaped components is provided with a clamping hook, and the free end of the other arc-shaped component is provided with a bayonet; the clamping hook is connected to the bayonet in a buckling mode.

Preferably, the outer side wall of the ring body is formed with a surface texture or surface structure for increasing circumferential kinetic friction. As mentioned above, the locking ring of this solution needs to be screwed when the locking ring is connected to the object to be connected in the form of a hoop. In the scheme, surface textures or surface structures are added on the outer side wall of the ring body to increase friction force and facilitate force application rotation.

A second object of the present invention is to provide a built-in desk top socket, which includes a socket main body and a locking ring; the upper end part of the socket main body is provided with a check ring, and the outer wall of the socket main body below the check ring is provided with external thread teeth and/or external thread grooves; the locking ring is the locking ring as described above, and the inner helical teeth and/or the inner helical grooves of the locking ring can be in threaded connection with the outer helical teeth and/or the outer helical grooves on the socket body, so as to realize axial adjustment of the locking ring relative to the socket body.

When the embedded desktop socket is installed, the socket main body is embedded into the desktop opening, the check ring is erected on the edge of the desktop opening, and then the desktop plate is clamped by the locking ring and the check ring at the bottom so as to be fixed. In this scheme, the locking ring can be installed from the side with the staple bolt mode and hug closely socket main part, then through screw-thread fit structure, rotatory locking ring makes it compress tightly the desktop board.

Compared with the technical scheme of the background, the scheme can shorten the spiral path and is more convenient to disassemble and assemble; the table top is more suitable for being installed in scenes with small space below the table top. In addition, if the scheme only adopts the hoop mode, the locking ring is difficult to compress the desktop plate, and the embedded desktop socket can be loosened, so that the hoop structure and the thread structure are combined in the scheme, and the installation mode is simplified on the basis of meeting the requirement of installation compression.

Preferably, the socket body is provided with a guide groove arranged along the longitudinal direction, a screw rod is movably arranged in the guide groove in the circumferential direction, and the screw rod is axially arranged along the groove-shaped direction of the guide groove; the screw rod is sleeved with a clamping component, the screw rod is meshed with threads on the clamping component, and the guide groove limits circumferential movement of the clamping component. In the technical scheme, the bolt is rotated by an external force through the screwdriver, and the circumferential movement of the clamping part is limited by the guide groove when the bolt rotates in the circumferential direction, so that the clamping part moves along the axial direction of the bolt (similar to a screw rod movement structure), the height of the clamping part is adjusted, the desktop plate is clamped by the clamping part and the retainer ring, the desktop socket is firmly fixed, and looseness is prevented.

In a further preferred scheme, the socket main body is provided with a hidden groove communicated with the lower end part of the guide groove; when the clamping component moves to the lower end part of the guide groove, the clamping component can enter the hidden groove along with the rotation of the screw rod. In the technical scheme, when the socket does not need to be assembled, the clamping part can be hidden in the hidden groove, so that the socket body cannot be prevented from being assembled in the through hole of the desktop plate; and under this structure, the reverse rotation bolt can move down clamping part and finally can get into hide the inslot, therefore this scheme can also realize the repeated dismouting of desktop socket, is convenient for maintain and move the dress.

Preferably, a decorative panel is detachably connected to the upper end face of the socket main body, and the decorative panel covers the screw head of the screw rod. In this scheme, adopt the decoration panel to cover the spiral shell head, make socket subject's outward appearance more clean and tidy.

Preferably, the socket main body comprises a shell and a plurality of power taking modules arranged on the shell; the shell is internally provided with a conductive assembly, the lower end of the shell is provided with an electric connection socket, and the upper end of the shell is provided with a plurality of electricity taking grooves; the electricity connection socket is used for connecting a wiring terminal in an inserting mode, and the electricity taking module is detachably embedded in the electricity taking groove. In this scheme, get electric module and socket subject's the electric groove releasable connection of getting, get the dismantled and assembled replacement of electric module, the user selects the electric module of getting of installation according to its user demand.

Drawings

Fig. 1 is a schematic view showing a closed state of the locking ring described in embodiment 1.

Fig. 2 is a schematic view showing an open state of the locking ring described in embodiment 1.

Figure 3 is a schematic view of the locking ring being fitted over the socket body.

Figure 4 is a schematic view of the mounting of the locking ring to the socket body.

Fig. 5 is a partially exploded view of the recessed table top receptacle.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

as shown in fig. 1 and 2, the present embodiment relates to a locking ring including a ring body 1. The inner wall of the ring body 1 is circular, and at least the upper end of the ring body 1 is provided with a baffle ring 11. In a further preferred scheme, baffle rings 11 are arranged at both axial ends of the ring body 1, so that the ring body 1 has no upper end and lower end distinction, and the direction does not need to be selected when the ring body is used. The inner wall of the ring body 1 is provided with inner spiral teeth and/or inner spiral grooves which are spiral along the axis. The inner wall of the ring body 1 of the locking ring is provided with inner spiral teeth 12 and/or inner spiral grooves 13, wherein the inner spiral teeth 12 and/or the inner spiral grooves 13 can be continuous or discontinuous. The locking ring is connected with the connected object thread in the center thereof based on the internal spiral teeth 12 and/or the internal spiral grooves 13, and the axial movement and positioning can be realized based on the thread matching.

On the basis, the ring body 1 comprises a plurality of arc-shaped components 10, and the arc-shaped components 10 can be connected end to form the ring body 1; and at least two arc-shaped components 10 are movably arranged, and the free ends of the two arc-shaped components 10 are detachably connected and fixed. The ring body 1 in the above-mentioned scheme includes a plurality of arc-shaped members 10, and the plurality of arc-shaped members 10 form a ring shape in an assembled state, and can be screwed or unscrewed. The free ends of the two arc-shaped members 10 can be disassembled, so that the locking ring can be sleeved on an object to be connected from the opening of the locking ring, and then the free ends of the two arc-shaped members 10 are connected and fixed to form a ring shape and tightly hold the object to be connected; similar to existing hoops.

This scheme adopts above-mentioned structure, can be earlier near the region at pressure equipment position on the object by the locking ring cover when the assembly, then rotatory locking ring screw is screwed and can be realized the tight fit. The scheme is suitable for replacing the ferrule in the embedded desktop socket in the background art, and the locking ring can be applied to other structures needing thread locking.

As shown in fig. 2, when the two arc members 10 are disassembled, the free ends of the two arc members 10 form an opening having a diameter larger than the inner diameter of the ring body 1. In the technical scheme, when the two arc-shaped components 10 movably arranged on the ring body 1 are in an open state, the opening calibers of the two arc-shaped components are enough to install a connected object into the two arc-shaped components, and the outer diameter of the connected object is matched with the inner diameter of the ring body 1 in a closed state.

In a further embodiment as shown in the figures, the locking ring comprises two arcuate members 10, each arcuate member 10 being semi-circular, the two arcuate members 10 in combination being capable of forming the ring body 1. Specifically, the following two structures can be adopted:

1, the structure I (as shown in figure 1) is that one ends of two arc-shaped members 10 are hinged, and the other ends of the two arc-shaped members 10 are detachably connected and fixed. According to the scheme, the two arc-shaped members 10 are hinged to each other, can rotate and are more convenient to disassemble and assemble.

And 2, the structure II (omitted in the figure) is that the two end parts of the two arc-shaped members 10 in the scheme can be detachably connected and fixed. The two arc-shaped members 10 in this solution are separated from each other in the unassembled state.

Of course, in other alternative, three arc members 10 may be used, wherein the two arc members 10 are hinged to the middle arc member 10 at one end, and the two free ends can be detachably connected. Although more than three arcuate members 10 may be used in other arrangements.

In a specific embodiment, the free ends of the two arc-shaped members 10 are connected in a snap-fit manner, so that the assembly and disassembly are more convenient. A hook 14 is arranged on the free end of one of the arc-shaped components 10, a bayonet 15 is constructed on the free end of the other arc-shaped component 10, and the hook 14 is connected to the bayonet 15 in a buckling manner. As shown in the figures, a latch 16 is disposed on a self-contained end of the arc-shaped member 10, the latch 16 is located at a radial outer side of a side wall of the arc-shaped member 10, and a bayonet 15 is formed between the latch 16 and the side wall of the arc-shaped member 10. Moreover, the hook 14 on the other side and the latch 16 are in guiding fit by adopting an inclined plane, and when the free ends of the two arc-shaped components 10 are assembled, the alignment is not needed, and the buckling connection can be realized only by relative pressing. When unlocking, only external force acts on the hook 14 to separate the hook from the fixture block 16, and unlocking can be realized under the action of radial distraction force.

In a further aspect, the outer sidewall of the ring body 1 is formed with a surface texture or surface structure for increasing circumferential kinetic friction. As mentioned above, the locking ring of this solution needs to be screwed when the locking ring is connected to the object to be connected in the form of a hoop. In the scheme, surface textures or surface structures are added on the outer side wall of the ring body 1 for increasing friction force and facilitating force application rotation. The surface texture can be a concave-convex structure, a pattern or an anti-skid layer arranged on the outer side wall of the ring body 1; the surface structure may be that circular arc-shaped protrusions are circumferentially arranged on the outer side wall of the ring body 1 as shown in the figure.

Example 2:

as shown in fig. 3 to 5, the present embodiment provides a built-in desk top socket including a socket main body 2 and a locking ring. Socket body 2 includes casing 21 to and set up a plurality of on casing 21 and get electric module 22. The inside electrically conductive subassembly that is equipped with of casing 21, casing 21 lower extreme are equipped with and connect electric socket, and casing 21 upper end is equipped with a plurality of and gets electric groove 24. The electric connection socket is used for connecting a wiring terminal in an inserting mode, and the electricity taking module 22 is detachably embedded in the electricity taking groove 24. In this scheme, get electric module 22 and socket main body 2 get electric groove 24 releasable connection, get the removable and attachable replacement of electric module 22, the user selects the electric module 22 of getting of installation according to its user demand.

The upper end of the socket body 2 is provided with a retainer ring 25, and the outer wall of the socket body 2 below the retainer ring 25 is provided with an external thread tooth 261 and/or an external thread groove 262. The locking ring is a locking ring as described in embodiment 1, and the internal helical teeth 12 and/or internal helical grooves 13 of the locking ring can be threadedly coupled with the external helical teeth 261 and/or external helical grooves 262 on the socket body 2 to enable axial adjustment of the locking ring relative to the socket body 2.

When the embedded desktop socket is installed, the socket main body 2 is embedded in the desktop opening, the retainer ring 25 is erected on the edge of the desktop opening, and then the desktop plate is clamped by the locking ring at the bottom and the retainer ring 25 so as to be fixed. In this scheme, the locking ring can be installed from the side with the staple bolt mode and hug closely socket main part 2, then through screw-thread fit structure, rotatory locking ring makes it compress tightly the desktop board.

Compared with the technical scheme of the background, the scheme can shorten the spiral path and is more convenient to disassemble and assemble. The table top is more suitable for being installed in scenes with small space below the table top. In addition, if the scheme only adopts the hoop mode, the locking ring is difficult to compress the desktop plate, and the embedded desktop socket can be loosened, so that the hoop structure and the thread structure are combined in the scheme, and the installation mode is simplified on the basis of meeting the requirement of installation compression.

In a further embodiment, the socket body 2 is provided with a guide groove 27 arranged along the longitudinal direction, a screw 28 is movably arranged in the guide groove 27 in the circumferential direction, and the screw 28 is axially arranged along the groove shape direction of the guide groove 27. The screw 28 is sleeved with a clamping component 29, the screw 28 is meshed with threads on the clamping component 29, and the guide groove 27 limits circumferential movement of the clamping component 29. In the technical scheme, the bolt is rotated by an external force through the screwdriver, and the guide groove 27 limits the circumferential movement of the clamping part 29 when the bolt rotates circumferentially, so that the clamping part 29 moves axially along the bolt (similar to a screw rod movement structure), the height of the clamping part 29 is adjusted, the clamping part 29 and the retainer ring 25 clamp the desktop plate, the desktop socket is firmly fixed, and looseness is prevented.

The socket body 2 is provided with a hidden groove 271 communicated with the lower end of the guide groove 27. When the clamping member 29 moves to the lower end of the guide groove 27, it can enter the hidden groove 271 with the rotation of the screw 28. In this technical solution, when the socket body does not need to be assembled, the clamping member 29 can be hidden in the hidden groove 271, so that the socket body is not prevented from being installed in the through hole of the table top. Moreover, under the structure, the clamping part 29 can be moved downwards by reversely rotating the bolt and finally can enter the hidden groove 271, so that the scheme can also realize repeated assembly and disassembly of the desktop socket, and is convenient to maintain and move.

In addition, a decorative panel 20 is detachably attached to the upper end surface of the socket main body 2, and the decorative panel 20 covers the screw head of the screw 28. In this scheme, adopt decoration panel 20 to cover the spiral shell head, make socket main body 2's outward appearance more clean and tidy.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.