阅读说明：本技术 一种基于高铁应用的便捷拼装婴儿床 (Convenient crib of assembling based on high-speed railway is used ) 是由 付本元 刘驰 李祝强 于 2021-09-22 设计创作，主要内容包括：本发明公开了一种基于高铁应用的便捷拼装婴儿床,涉及高铁应用装置技术领域。本发明包括多个轻量化支柱结构,轻量化支柱结构用于形成受力支撑和高度调节,拼装底座结构,拼装底座结构设置于轻量化支柱结构的顶端,拼装底座结构用于放置婴儿,拼装护栏结构,拼装护栏结构设置与拼装底座结构的顶端,拼装护栏结构用于形成对放置婴儿的防护。本发明通过结构整体的复合设计,使得装置便于拆解后便捷的放置在不同的放置箱或包内,跟随携带至高铁处,在高铁座椅间隙之间进行便捷的拼装后形成一个便于放置婴儿的婴儿床,大大提高了携带婴儿的出行省力性能。(The invention discloses a convenient and fast assembled crib based on high-speed rail application, and relates to the technical field of high-speed rail application devices. The baby stroller comprises a plurality of light-weight pillar structures, wherein the light-weight pillar structures are used for forming stress support and height adjustment, base assembling structures are arranged at the top ends of the light-weight pillar structures and used for placing a baby, guardrail assembling structures are arranged and assembled at the top ends of the base assembling structures, and the guardrail assembling structures are used for forming protection for placing the baby. According to the invention, through the composite design of the whole structure, the device is conveniently disassembled and conveniently placed in different placing boxes or bags, and then is conveniently assembled between the high-speed rail seat gaps to form the crib convenient for placing a baby, so that the labor-saving performance of carrying the baby during traveling is greatly improved.)

1. The utility model provides a crib is assembled to convenience based on high-speed railway is used which characterized in that: comprising a plurality of lightweight strut structures (1), the lightweight strut structures (1) being used to form a stressed support and height adjustment;

the assembling base structure (2), the assembling base structure (2) is arranged at the top end of the light-weight pillar structure (1), and the assembling base structure (2) is used for placing a baby;

assemble guardrail structure (3), assemble guardrail structure (3) and set up and assemble the top of base structure (2), it is used for forming the protection to placing the baby to assemble guardrail structure (3).

2. The convenient assembled crib based on high-speed rail application of claim 1, characterized by: the lightweight pillar structure (1) comprises a supporting pillar (12), a height adjusting module, a folding bearing module and a matching limiting module, wherein the height adjusting module is arranged on the outer side and the inner side of the bottom end of the supporting pillar (12), the folding bearing module is arranged on the two sides of the supporting pillar (12), and the matching limiting module is arranged on the top end of the supporting pillar (12).

3. The convenient assembled crib based on high-speed rail application of claim 2, characterized by: the height adjusting module comprises an elastic clamping limiting structure and a sliding extending structure, the sliding extending structure is arranged on the inner side of the supporting column (12), and the elastic clamping limiting structure is arranged on the outer side of the supporting column (12).

4. The convenient assembled crib based on high-speed rail application of claim 3, characterized by: the elastic clamp limiting structure comprises a positioning clamping block (13), a first carrying plate (14), a central rotating shaft (15), an overturning sleeve (16), a pressing push plate (17), a spring (18) and a positioning pin (31), wherein the inner side of the positioning clamping block (13) is fixedly connected with a supporting column (12), the two sides of one end, far away from the supporting column (12), of the positioning clamping block (13) are fixedly provided with the first carrying plate (14), the inner side of the first carrying plate (14) is provided with the central rotating shaft (15), the outer side of the central rotating shaft (15) is rotatably connected with the overturning sleeve (16), one end, far away from the supporting column (12), of the overturning sleeve (16) is fixedly connected with the pressing push plate (17), one end, far away from the supporting column (12), of the top end of the positioning clamping block (13) is fixed with the spring (18), one end, far away from the positioning clamping block (13), of the spring (18) is fixedly connected with the top end of the pressing push plate (17), and a positioning pin (31) is arranged at one end of the bottom end of the downward pressing push plate (17) close to the positioning clamping block (13).

5. The convenient assembled crib based on high-speed rail application of claim 4, characterized by: the sliding extension structure comprises a height adjusting slide bar (29) and an adjusting hole (30), the height adjusting slide bar (29) is connected with the supporting column (12) in a sliding mode, a plurality of adjusting holes (30) are formed in the inner side of the height adjusting slide bar (29), the adjusting hole (30) is also formed in the joint of the supporting column (12) and the positioning pin (31), the positioning pin (31) and the adjusting hole (30) are in clearance fit, and the height adjusting slide bar (29) and the supporting column (12) are fixedly connected through the adjusting hole (30) in the supporting column (12) and the adjusting hole (30) in the height adjusting slide bar (29) through the positioning pin (31).

6. The convenient assembled infant bed based on high-speed rail application of claim 5, wherein: the utility model discloses a bearing module of folding up, including extending axis of rotation (19), folding up crossbeam (20), folding up reservation groove (21), second take board (22), surely adorn piece (23) and locking screw (24), the equal fixedly connected with in both sides of support column (12) extends axis of rotation (19), the outside rotation that extends axis of rotation (19) is connected with the crossbeam (20) of folding up, the reservation groove (21) of folding up that fold up that is convenient for fold up and expand is seted up to the inboard of folding up crossbeam (20), the both sides of keeping away from support column (12) one end of folding up crossbeam (20) all are provided with second take board (22), the inboard rotation that the board (22) were taken to the second is connected with surely adorns piece (23), the inboard of adorning piece (23) has locking screw (24) through threaded connection.

7. The convenient assembled infant bed based on high-speed rail application of claim 6, wherein: the assembly limiting module comprises an assembly locking positioning column (25), a reserved assembly hole (26), a reserved rod (27) and a locking threaded column (28), wherein the assembly locking positioning column (25) is welded at the top end of the supporting column (12), the reserved rod (27) is welded at the top end of the assembly locking positioning column (25), the locking threaded column (28) is welded at the top end of the reserved rod (27), threads are respectively arranged on the outer side of the locking threaded column (28) and the outer side of the assembly locking positioning column (25), the reserved assembly hole (26) is respectively arranged at four ends of the assembly locking positioning column (25), the supporting column (12), a positioning clamping block (13), a first assembly plate (14), a central rotating shaft (15), a turnover sleeve (16), a downward pressing push plate (17), an extending rotating shaft (19), a folding cross beam (20), a second assembly plate (22), a fixed assembly block (23), a locking screw (24), The locking positioning column (25), the reserved rod (27), the locking threaded column (28), the height adjusting slide rod (29) and the positioning pin (31) are all made of light materials.

8. The convenient assembled crib based on high-speed rail application of claim 7, characterized by: the assembling base structure (2) comprises a lock nut bottom plate (4), a placing bed body (5), a reserved assembling hole (6), a lock nut top plate (7) and a first guardrail rod (9), wherein the lock nut bottom plate (4) is in threaded connection with a lock positioning column (25), the outer side of the reserved rod (27) is in sliding connection with the placing bed body (5), the reserved assembling hole (6) is formed in each of four ends of the placing bed body (5), the reserved assembling hole (6), the reserved rod (27), the reserved assembling hole (6) and a locking threaded column (28) are in clearance fit, the outer side of the locking threaded column (28) is in threaded connection with the lock nut top plate (7), a plurality of magnetic suction clamping grooves (8) are formed in the top end of the lock nut top plate (7), and the placing bed body (5) is made of woven fabrics.

9. The convenient assembled crib based on high-speed rail application of claim 8, characterized by: it includes first guardrail bar (9), guardrail main part (10) and second guardrail bar (11) to assemble guardrail structure (3), the bottom of first guardrail bar (9) and the bottom of second guardrail bar (11) all are provided with the magnet piece, first guardrail bar (9) and second guardrail bar (11) are inhaled with magnetism through magnet piece and draw-in groove (8) inboard magnetism and are connected, be provided with between first guardrail bar (9) and the second guardrail bar (11) guardrail main part (10), the material of guardrail main part (10) is for weaving the type material.

Technical Field

The invention relates to the technical field of high-speed rail application devices, in particular to a conveniently assembled crib based on high-speed rail application.

Background

Along with the rapid development of the high-speed railway cause of China, more and more people go on a journey and set up the selection high-speed railway, wherein the traveler who carries the baby is not lacked, but, the existing high-speed railway seat is not convenient for place the baby in the taking process, leads to needing the traveler to embrace the baby for a long time, invests a large amount of manpower, and all the other existing trip equipment is because whole heavier, and the volume is great, is not convenient for adjust, leads to being convenient not enough in the whole use.

Disclosure of Invention

The invention aims to provide a conveniently assembled crib based on high-speed rail application, which aims to solve the existing problems: the existing trip equipment is heavy in whole, large in size and inconvenient to adjust, so that the whole using process is not convenient and fast.

In order to achieve the purpose, the invention provides the following technical scheme: a conveniently assembled crib based on high-speed rail application comprises a plurality of lightweight pillar structures, wherein the lightweight pillar structures are used for forming stress support and height adjustment;

the assembling base structure is arranged at the top end of the lightweight pillar structure and used for placing a baby;

assemble the guardrail structure, assemble guardrail structure setting and assemble the top of base structure, it is used for forming the protection to placing the baby to assemble the guardrail structure.

Preferably, the lightweight pillar structure comprises a supporting pillar, a height adjusting module, a folding bearing module and a matching limiting module, wherein the height adjusting module is arranged on the outer side and the inner side of the bottom end of the supporting pillar, the folding bearing module is arranged on the two sides of the supporting pillar, and the matching limiting module is arranged on the top end of the supporting pillar.

Preferably, the height adjusting module comprises an elastic clamping limiting structure and a sliding extending structure, the sliding extending structure is arranged on the inner side of the supporting column, and the elastic clamping limiting structure is arranged on the outer side of the supporting column.

Preferably, bullet card limit structure includes location fixture block, first board, central pivot, upset sleeve, push pedal, spring and locating pin of taking down, the inboard and the support column fixed connection of location fixture block, the location fixture block is kept away from the equal fixed total first board of taking in both sides of support column one end, the inboard of first board of taking is provided with the central pivot, the outside of central pivot is rotated and is connected with the upset sleeve, the one end fixedly connected with push pedal that pushes down of support column is kept away from to the upset sleeve, the one end that the support column was kept away from on location fixture block top is fixed with the spring, the one end that the location fixture block was kept away from to the spring is fixed with the top fixed connection of push pedal with pushing down, the one end that the push pedal bottom of pushing down is close to the location fixture block is provided with the locating pin.

Preferably, the slip extending structure includes high adjustment slide bar and allotment hole, the inboard sliding connection of high adjustment slide bar and support column, a plurality of allotment holes have been seted up to the inboard of high adjustment slide bar, the allotment hole has also been seted up with the junction of locating pin to the support column, the locating pin is clearance fit with allotment hole, high adjustment slide bar runs through the allotment hole of support column department and the allotment hole fixed connection of high adjustment slide bar department with the support column through the locating pin.

Preferably, the load-bearing module of folding up includes the axis of rotation of extending, folds up the crossbeam, folds up the reservation groove, the second takes the board, surely adorns piece and locking screw, the equal fixedly connected with in both sides of support column extends the axis of rotation, the outside of extending the axis of rotation is rotated and is connected with the crossbeam of folding up, the inboard of folding up the crossbeam is seted up and is convenient for fold up the reservation groove of folding up that expandes, the both sides that the support column one end was kept away from to the crossbeam of folding up all are provided with the second and take the board, the inboard of second taking the board is rotated and is connected with surely adorning the piece, surely adorn the inboard of piece and have locking screw through threaded connection.

Preferably, the assembling limiting module comprises a matching locking positioning column, a reserved matching hole, a reserved rod and a locking threaded column, the top end of the supporting column is welded with the matching locking positioning column, the top end of the matching locking positioning column is welded with the reserved rod, the top end of the reserved rod is welded with the locking threaded column, threads are arranged on the outer side of the locking threaded column and the outer side of the matching locking positioning column, the reserved matching hole is arranged at each of four ends of the matching locking positioning column, and the supporting column, the positioning clamping block, the first lapping plate, the central rotating shaft, the overturning sleeve, the downward pressing push plate, the extending rotating shaft, the folding cross beam, the second lapping plate, the fixing block, the locking screw, the matching locking positioning column, the reserved rod, the locking threaded column, the height adjusting sliding rod and the positioning pin are all made of light materials.

Preferably, the assembling base structure comprises a lock nut bottom plate, a placing bed body, a reserved assembling hole, a lock nut top plate and a first guardrail rod, the lock nut bottom plate is in threaded connection with a lock positioning column, the outside of the reserved rod is in sliding connection with the placing bed body, the reserved assembling hole is formed in each of four ends of the placing bed body, the reserved assembling hole, the reserved rod, the reserved assembling hole and the locking threaded column are in clearance fit, the lock nut top plate is in threaded connection with the outside of the locking threaded column, a plurality of magnetic suction grooves are formed in the top end of the lock nut top plate, and the placing bed body is made of woven fabrics.

Preferably, the assembled guardrail structure comprises a first guardrail rod, a guardrail main body and a second guardrail rod, wherein the bottom end of the first guardrail rod and the bottom end of the second guardrail rod are respectively provided with a magnet block, the first guardrail rod and the second guardrail rod are magnetically attracted and connected with the inner side of the magnetic attraction clamping groove through the magnet blocks, the guardrail main body is arranged between the first guardrail rod and the second guardrail rod, and the guardrail main body is made of woven fabrics.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the composite design of the whole structure, the device is conveniently disassembled and conveniently placed in different placing boxes or bags, and then is conveniently assembled between the high-speed rail seat gaps to form the crib convenient for placing a baby, so that the labor-saving performance of carrying the baby during traveling is greatly improved;

2. through the structural design, the device is convenient for adjusting the placement height according to the heights of different users, so that the device is convenient for adapting to the requirements of people with different heights on the nursing height of the baby;

3. the portable solar water heater is light in weight and convenient to carry.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is an exploded view of the present invention as a whole;

FIG. 3 is a schematic structural view of a lightweight pillar structure according to the present invention;

FIG. 4 is a schematic view showing the folding of the lightweight pillar structure according to the present invention;

FIG. 5 is a schematic view of a partial structure of the height adjustment module of the present invention;

FIG. 6 is a schematic view of the present invention showing the folding and carrying of the bed body;

fig. 7 is a schematic view of the assembled guard rail structure of the present invention being folded and carried.

In the figure: 1. a lightweight pillar structure; 2. assembling a base structure; 3. assembling a guardrail structure; 4. a lock nut bottom plate is arranged; 5. placing the bed body; 6. reserving a matching hole; 7. a lock nut top plate is arranged; 8. a magnetic suction slot; 9. a first guard rail; 10. a guardrail body; 11. a second guard rail; 12. a support pillar; 13. positioning a fixture block; 14. a first carrying plate; 15. a central rotating shaft; 16. turning over the sleeve; 17. pressing the push plate downwards; 18. a spring; 19. an extension rotation shaft; 20. folding the beam; 21. folding the reserved groove; 22. a second carrying plate; 23. fixing a block; 24. locking the screw; 25. matching a locking positioning column; 26. reserving a matching hole; 27. reserving a rod; 28. locking the threaded column; 29. a height adjustment slide bar; 30. a dispensing hole; 31. and a positioning pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-7, a convenient and fast assembled crib based on high-speed rail application comprises four lightweight pillar structures 1, wherein the lightweight pillar structures 1 are used for forming stress support and height adjustment;

the assembling base structure 2 is arranged at the top end of the light-weight pillar structure 1, and the assembling base structure 2 is used for placing a baby;

assemble guardrail structure 3, assemble guardrail structure 3 and set up and assemble the top of base structure 2, assemble guardrail structure 3 and be used for forming the protection to placing the baby.

The lightweight pillar structure 1 comprises a supporting pillar 12, a height adjusting module, a folding bearing module and an assembling limiting module, wherein the height adjusting module is arranged on the outer side and the inner side of the bottom end of the supporting pillar 12, the folding bearing module is arranged on two sides of the supporting pillar 12, and the assembling limiting module is arranged on the top end of the supporting pillar 12;

the height adjusting module comprises an elastic clamping limiting structure and a sliding extending structure, the sliding extending structure is arranged on the inner side of the supporting column 12, and the elastic clamping limiting structure is arranged on the outer side of the supporting column 12;

the elastic clamp limiting structure comprises a positioning clamping block 13, a first carrying plate 14, a central rotating shaft 15, an overturning sleeve 16, a downward pressing push plate 17, a spring 18 and a positioning pin 31, wherein the inner side of the positioning clamping block 13 is fixedly connected with a support column 12, the two sides of one end, far away from the support column 12, of the positioning clamping block 13 are both fixedly provided with the first carrying plate 14, the inner side of the first carrying plate 14 is provided with the central rotating shaft 15, the outer side of the central rotating shaft 15 is rotatably connected with the overturning sleeve 16, one end, far away from the support column 12, of the overturning sleeve 16 is fixedly connected with the downward pressing push plate 17, one end, far away from the support column 12, of the top end of the positioning clamping block 13 is fixedly connected with the top end of the downward pressing push plate 17, and one end, close to the positioning clamping block 13, of the bottom end of the downward pressing push plate 17 is provided with the positioning pin 31;

the sliding extension structure comprises a height adjusting slide bar 29 and a matching hole 30, the height adjusting slide bar 29 is connected with the inner side of the support column 12 in a sliding manner, a plurality of matching holes 30 are formed in the inner side of the height adjusting slide bar 29, a matching hole 30 is also formed in the joint of the support column 12 and a positioning pin 31, the positioning pin 31 is in clearance fit with the matching hole 30, and the height adjusting slide bar 29 and the support column 12 are fixedly connected through the matching hole 30 in the support column 12 and the matching hole 30 in the height adjusting slide bar 29 through the positioning pin 31;

the folding bearing module comprises an extending rotating shaft 19, a folding cross beam 20, a folding preformed groove 21, a second carrying plate 22, a fixing device 23 and locking screws 24, the extending rotating shaft 19 is fixedly connected to two sides of the supporting column 12, the folding cross beam 20 is rotatably connected to the outer side of the extending rotating shaft 19, the folding preformed groove 21 convenient to fold and unfold is formed in the inner side of the folding cross beam 20, the second carrying plate 22 is arranged on two sides of one end, away from the supporting column 12, of the folding cross beam 20, the fixing device 23 is rotatably connected to the inner side of the second carrying plate 22, and the locking screws 24 are connected to the inner side of the fixing device 23 through threads;

the assembly limiting module comprises an assembly locking positioning column 25, a reserved assembly hole 26, a reserved rod 27 and a locking threaded column 28, the top end of the supporting column 12 is welded with the assembly locking positioning column 25, the top end of the assembly locking positioning column 25 is welded with the reserved rod 27, the top end of the reserved rod 27 is welded with the locking threaded column 28, the outer side of the locking threaded column 28 and the outer side of the assembly locking positioning column 25 are both provided with threads, four ends of the assembly locking positioning column 25 are both provided with the reserved assembly hole 26, the supporting column 12, the positioning fixture block 13, the first lapping plate 14, the central rotating shaft 15, the overturning sleeve 16, the downward pressing push plate 17, the extending rotating shaft 19, the cross beam 20, the second lapping plate 22, the fixed assembly block 23, the locking screw 24, the assembly locking positioning column 25, the reserved rod 27, the locking threaded column 28, the height adjusting sliding rod 29 and the positioning pin 31 are all made of light-weight materials;

in one embodiment, the lightweight material is specifically an aluminum alloy, and in other embodiments, the lightweight material may be other materials.

The assembly base structure 2 comprises a lock nut bottom plate 4, a placing bed body 5, a reserved assembling hole 6, a lock nut top plate 7 and a first guardrail rod 9, the lock nut bottom plate 4 is in threaded connection with a lock positioning column 25, the placing bed body 5 is connected to the outer side of a reserved rod 27 in a sliding mode, the reserved assembling hole 6 is formed in each of four ends of the placing bed body 5, the reserved assembling hole 6 is in clearance fit with the reserved rod 27, the reserved assembling hole 6 is in clearance fit with a locking threaded column 28, the lock nut top plate 7 is connected to the outer side of the locking threaded column 28 in a threaded mode, a plurality of magnetic suction grooves 8 are formed in the top end of the lock nut top plate 7, and the placing bed body 5 is made of woven fabrics;

the assembled guardrail structure 3 comprises a first guardrail rod 9, a guardrail main body 10 and a second guardrail rod 11, the bottom end of the first guardrail rod 9 and the bottom end of the second guardrail rod 11 are respectively provided with a magnet block, the first guardrail rod 9 and the second guardrail rod 11 are magnetically attracted with the inner side of the magnetic attraction clamping groove 8 through the magnet blocks and are connected, the guardrail main body 10 is arranged between the first guardrail rod 9 and the second guardrail rod 11, and the guardrail main body 10 is made of woven fabrics.

In one embodiment, the fabric is an elastic canvas, and in other embodiments, the fabric may be other materials.

When the portable bed is used, the four lightweight pillar structures 1 are sequentially placed in a portable object such as a backpack and the like, and the placing bed body 5 and the splicing guardrail structures 3 are folded and then placed in the portable object, so that the portable bed is convenient to carry as the whole body is made of lightweight materials;

until the high-speed rail seat, the lightweight pillar structure 1 is taken out and unfolded, in the unfolding process, the folding crossbeam 20 is pulled to rotate around the extension rotating shaft 19 to form an angle for unfolding, the locking screw 24 at the position is aligned to the reserved matching hole 26 at the position of another connected lightweight pillar structure 1, the locking screw 24 is rotated at the moment, the locking screw 24 is in threaded connection with the inner side of the reserved matching hole 26 through the fixing block 23, after the four lightweight pillar structures 1 are sequentially connected, the assembly among the four lightweight pillar structures 1 is completed, the pressing push plate 17 is pressed, the pressing push plate 17 presses the spring 18, the spring 18 is compressed under stress, the turnover sleeve 16 surrounds the central rotating shaft 15 due to the connection of the turnover sleeve 16 and the central rotating shaft 15, the positioning pin 31 is pulled out from the matching hole 30 at the supporting pillar 12 and the matching hole 30 at the height adjusting slide bar 29, after the height adjusting slide bar 29 is pulled out, the height adjusting slide bar 29 slides downwards in the supporting column 12, at the moment, the extension length is adjusted by pulling the height adjusting slide bar 29 until the extension length is proper, the adjusting hole 30 at the height adjusting slide bar 29 corresponds to the adjusting hole 30 at the supporting column 12, at the moment, the stress on the pressing push plate 17 is released, the spring 18 returns to push the pressing push plate 17 to enable the positioning pin 31 to penetrate through the adjusting hole 30 at the supporting column 12 and the adjusting hole 30 at the height adjusting slide bar 29 after the pressure is synchronously lost, and the height adjustment is completed;

at the moment, the top plate 7 of the matched lock nut is rotated and separated from the position of the locking threaded column 28, the placing bed body 5 is slid and pressed down to the position of the reserved rod 27 through the matching of the reserved assembling hole 6, the locking threaded column 28 and the reserved rod 27, at the moment, the bottom plate 4 of the matched lock nut is rotated to enable the bottom plate 4 of the matched lock nut to ascend around threads at the position of the matched lock positioning column 25, the top plate 7 of the matched lock nut is rotated to enable the top plate 7 of the matched lock nut to stably descend until the top plate 7 of the matched lock nut and the bottom plate 4 of the matched lock nut form clamping limit on the placing bed body 5, and due to the arrangement, after the top plate 7 of the matched lock nut completes the clamping on the placing bed body 5, the position of the magnetic clamping groove 8 is at an angle suitable for carrying the whole assembled guardrail structure 3;

at this time, the first guardrail rod 9 and the second guardrail rod 11 are inserted into the magnetic attraction clamping groove 8, so that the guardrail main body 10 is unfolded to complete the whole assembly.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.