CN108505920B

CN108505920B - Roller shutter built-in hollow glass with adjustable light transmittance

Info

Publication number: CN108505920B
Application number: CN201810360025.0A
Authority: CN
Inventors: 黄武伟
Original assignee: Jiangsu Bocheng Energy Saving Glass Co ltd
Current assignee: Jiangsu Bocheng Energy Saving Glass Co ltd
Priority date: 2018-04-20
Filing date: 2018-04-20
Publication date: 2023-06-09
Anticipated expiration: 2038-04-20
Also published as: CN108505920A

Abstract

The invention relates to a hollow glass window, in particular to a shutter built-in hollow glass with adjustable light transmittance, which comprises a frame and a shutter inside the frame, wherein glass is arranged on the front side and the rear side of the frame, the top of the shutter is in a folded plate shape, a winder for winding the shutter upwards from the bottom is arranged in the frame, the shutter comprises a shading part and an extending part which are connected into a whole, the shading part is parallel to the glass, the extending part is contracted on the left side and the right side in the frame, rails are arranged in the frame along the extending direction of the shutter, and the top of the shutter is connected with the rails in a matched manner and can extend or contract along the rails. The invention provides a roller shutter built-in hollow glass with adjustable light transmittance, which has the advantage of adjustable light transmittance. The invention has the following beneficial effects: from the structure, the hollow glass with the built-in roller shutter has the function of adjustable light transmittance, has simple structure, is easy to manufacture, and is suitable for popularization and use.

Description

Roller shutter built-in hollow glass with adjustable light transmittance

Technical Field

The invention relates to a hollow glass window, in particular to a roll-up curtain built-in hollow glass with adjustable light transmittance.

Background

The window glass used at present uses the curtain as a shielding object for light shielding and privacy protection, but the curtain is not sanitary in many fields, and the regular cleaning of the curtain not only consumes water resources, but also causes pollution to the environment due to the detergent. Curtains in public places such as hospitals, schools, hotels, toilets and the like often become parasitic lands for dust, bacteria, mosquitoes and the like, are inconvenient to disinfect, and are inflammable when exposed to fire.

Although the hollow glass shutter can solve the problems, gaps are arranged among the shutter sheets, so that not only is the light leakage reduced the sun shading effect, but also privacy is easy to snoop, and in order to solve the problems, the hollow glass with the built-in roller shutter is arranged in the hollow glass, and the roller shutter is retracted and released in an electric control or magnetic control mode, so that the light leakage problem of the traditional hollow glass shutter can be solved when the roller shutter is completely put down. The built-in hollow glass of the roller shutter can only achieve three states of full opening, full closing and half opening, the roller shutter is required to be put down completely when sunshade is needed, the sunshade effect is affected due to high light transmittance of the roller shutter material, the indoor is too dark due to low light transmittance, additional energy consumption is caused due to the need of lighting by switching on a lamp, and the roller shutter cannot be paid out.

At present, although LOW-E, film sticking and coated glass exist, the thickness of the film cannot be changed, and the film cannot be used for adjusting the light transmittance of the hollow glass with the built-in roller shutter. At present, researches on the hollow glass with the built-in roller shutter and adjustable light transmittance are mainly started from glass materials, glass film pasting materials and roller shutter materials, the research and development cost is high, and at present, good research results are rarely presented, so that the problem is solved from the structural aspect, and the method is a good method.

Disclosure of Invention

The invention provides a roller shutter built-in hollow glass with adjustable light transmittance, which has the advantage of adjustable light transmittance.

The technical aim of the invention is realized by the following technical scheme: the utility model provides a roll up curtain built-in cavity glass of adjustable luminousness, includes frame and inside roll up curtain, and glass is equipped with to both sides around the frame, roll up curtain top is for rolling up the platy, is equipped with the rolling up ware of rolling up curtain from the bottom in the frame, and the roll up curtain is including linking into an organic whole shading portion and extension, and shading portion is parallel with glass, and extension shrink is in the left/right side in the frame, is equipped with the track along roll up curtain extending direction in the frame, roll up curtain top and track cooperation are connected and can follow track extension or shrink.

By adopting the technical scheme, the extension part of the roller shutter is released, so that the shading part of the roller shutter is compressed, the tighter the roller shutter is compressed, the lower the light transmittance is, and part of the shading part of the roller shutter can be compressed into the extension part, so that the roller shutter is stretched out to improve the light transmittance; when the window needs to be opened, the rolling shutter is rolled up from the bottom to the top by the rolling device. Therefore, the hollow glass with the built-in roller shutter has the basic window opening and closing function of a common hollow glass window and can adjust the light transmittance.

Preferably, both ends of the roller shutter are respectively fixed at the left side and the right side in the frame.

By adopting the technical scheme, light leakage at two sides in the process of tightening or stretching the roller shutter left and right can be avoided.

Preferably, the light shielding part of the roller shutter comprises a front light shielding part and a rear light shielding part, and the extension part is integrally connected between the front light shielding part and the rear light shielding part.

By adopting the technical scheme, the extension parts are respectively transferred to the front shading part and the rear shading part independently, so that the lowest light transmittance can be achieved, namely the light transmittance of the front layer and the rear layer of tightly contracted roller blinds is achieved, one of the front shading part and the rear shading part is fully rolled up to the extension part, and the other one of the front shading part and the rear shading part can reach the lowest light transmittance when being fully unfolded, so that the change range of the light transmittance is enlarged.

Preferably, the track comprises a guide shaft/line extending through the top of the roller blind.

By adopting the technical scheme, the track plays a role in guiding the movement of the roller shutter.

Preferably, a rotatable first screw rod and a rotatable second screw rod are arranged in the frame, a plurality of first nut seats connected with the roller shutter are matched on the first screw rod, a plurality of second nut seats connected with the roller shutter are matched on the second screw rod, and the first nut seats and the second nut seats are distributed in a staggered mode; a partition plate is arranged between the first screw rod and the second screw rod, and the partition plate is clung to the first nut seat and the second nut seat.

By adopting the technical scheme, the first screw rod and the second screw rod are respectively rotated, so that the first nut seat and the second nut seat form relative displacement, and the roller shutter is folded.

Preferably, the winder comprises a roll shaft, the roll shaft comprises a shaft sleeve and a shaft core, the shaft sleeve is sleeved on the shaft core, the bottom of the roller shutter is fixed on the shaft sleeve, a first sprocket is arranged at the end part of the shaft sleeve, a rotatable second sprocket is arranged on the frame, and the first sprocket is connected with the second sprocket through a chain.

By adopting the technical scheme, the shaft sleeve is rotated by the cooperation of the chain and the chain wheel, and the roller shutter is wound on the rotating shaft sleeve, so that the windowing effect can be achieved; when the chain wheel drives the shaft sleeve to rotate reversely, the roller shutter wound on the shaft sleeve can be put down, and the effect of closing the window can be achieved.

Preferably, a first rotating shaft is arranged on the frame, a pull rope is fixed on the first rotating shaft and wound on the first rotating shaft, and the pull rope extends to the bottom of the frame.

By adopting the technical scheme, a user can conveniently control the roller shutter to open and close the window by pulling the pull rope by hand.

Preferably, the frame is provided with a second rotating shaft, the tail end of the pull rope is fixed on the second rotating shaft, a gear is arranged on the second rotating shaft, a limiting hole is formed in the frame, a sleeve is arranged in the limiting hole in a matched mode, a perforation is arranged on the sleeve in parallel with the axis of the sleeve, a push rod is arranged in the perforation, one end of the push rod is provided with a rotary cap, the other end of the push rod is provided with an oblique tooth block propped against the gear, one end of the sleeve is provided with a pair of first grooves symmetrical to the perforation, a plunger capable of being inserted into the first grooves is arranged on the rotary cap, a second groove is formed in the other end of the sleeve, and a spring propping against the oblique tooth block is arranged in the second groove.

Through adopting above-mentioned technical scheme, the skewed tooth piece can prevent the gear reversal, and the gear can be reversed only when 180 degrees rotatory skewed tooth pieces, consequently can prevent to rise to the axle sleeve whereabouts of certain height, realized keeping the effect of windowing, only can the automatic window that closes when 180 degrees rotatory cap.

Preferably, a plurality of electromagnets are arranged at the top of the extension part of the rolling curtain, and adjacent electromagnets attract each other after being electrified.

By adopting the technical scheme, a user can press the switch before adjusting the transmittance of the roller shutter, electrify the electromagnets, and the extension parts of the roller shutter shrink under the action of mutual attraction between the electromagnets, so that the light shielding parts of the roller shutter stretch, and the effect of improving the transmittance of the roller shutter can be achieved; after the electromagnet is powered off, the extension part of the roller shutter is not attracted by magnetic force, and the extension part can extend to the shading part, so that the shading part is tightly contracted, and the effect of reducing the light transmittance of the roller shutter is achieved.

In summary, the invention has the following beneficial effects:

from the structure, the hollow glass with the built-in roller shutter has the function of adjustable light transmittance, has simple structure, is easy to manufacture, and is suitable for popularization and use.

Drawings

FIG. 1 is a top view showing the internal structure of a roll-up blind built-in hollow glass in example 1;

FIG. 2 is a front view showing the connection of the first screw/second screw with the vertical rod in example 1;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a side view showing the connection of the first sprocket to the second sprocket and the connection of the first rotational shaft to the second rotational shaft in example 1;

FIG. 5 is an enlarged view of portion B of FIG. 1;

FIG. 6 is a schematic view showing the internal structure of the housing in embodiment 1;

fig. 7 is a top view showing the internal structure of hollow glass with built-in roller shutter in example 2.

In the figure, 1, a frame; 2. glass; 3. a roller shutter; 31. a light shielding section; 31a, a front light shielding portion; 31b, a rear light shielding portion; 32. an extension; 4. a track; 5. a winder; 50. a roll shaft; 51. a shaft sleeve; 52. a shaft core; 6. a first screw; 61. a first nut seat; 7. a second screw; 71. a second nut seat; 8. a partition plate; 91. a first sprocket; 92. a second sprocket; 93. a chain; 101. a first rotating shaft; 102. a second rotating shaft; 103. a pull rope; 11. a housing; 111. a limiting hole; 12. a gear; 13. a sleeve; 131. perforating; 132. a first groove; 133. a second groove; 14. a push rod; 141. a cap is screwed; 1411. inserting a column; 142. a helical tooth block; 15. a spring; 16. an electromagnet; 17. a bearing; 18. a vertical rod; 19. a hand wheel; 201. a first plate; 202. and a second plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a roll up curtain built-in cavity glass of adjustable luminousness, as shown in fig. 1, includes frame 1, and glass 2 is installed to frame 1 front and back two sides, installs rolling slats 3 in the frame 1, and track 4 is installed at rolling slats 3 top, and rolling slats 3 can slide along track 4 to reach the effect of tightening up or stretching rolling slats 3, rolling slats 3 installs rolling members 5 in the bottom, thereby reaches the effect of windowing or closing the window.

As shown in fig. 1, the roll screen 3 has one end fixed to the left side inside the frame 1 and the other end fixed to the right side inside the frame 1. The top of the rolling curtain 3 is sewed with a plurality of hard plates, so that the top of the rolling curtain 3 can be folded into a folded plate shape, and the rest parts except the top of the rolling curtain 3 can be normally rolled by the rolling device 5. The portion of the roll screen 3 parallel to the glass 2 is divided into the light shielding portion 31, and the portion of the roll screen 3 hidden in the left or right side of the frame 1 is divided into the extension portion 32, and the extension portion 32 is often folded in a contracted state.

As shown in fig. 1, the rail 4 is a guide shaft/wire having both ends fixed to the left and right sides of the frame 1, respectively, and the guide shaft/wire penetrates the top of the roller blind 3 in the longitudinal direction of the roller blind 3, and the roller blind 3 is slidable on the guide shaft/wire. The top in the frame 1 is also horizontally fixed with a first screw rod 6 and a second screw rod 7, one ends of the first screw rod 6 and the second screw rod 7 are fixed on the frame 1 through bearings 17, and the other ends are connected with a vertical rod 18 (see figure 2) through bevel gears 12.

As shown in fig. 2, the tail end of the vertical rod 18 extends to the bottom outside the frame 1, and a hand wheel 19 is installed, and the hand wheel 19 can be rotated to drive the first screw 6/the second screw 7 to rotate.

As shown in fig. 1, a plurality of first nut seats 61 with uniform intervals are matched and arranged on the first screw rod 6, and the first nut seats 61 are connected with the top of the roller shutter 3 through a first plate 201; a plurality of second nut seats 71 with uniform intervals are matched and arranged on the second screw rod 7, and the second nut seats 71 are connected with the top of the roller shutter 3 through a second plate 202. And the first plates 201 and the second plates 202 are arranged in a staggered manner, the two sides of each first plate 201 are respectively provided with the second plates 202, and the two sides of each second plate 202 are respectively provided with the first plates 201. The top in the frame 1 is also fixed with a baffle 8, the baffle 8 is positioned between the first screw rod 6 and the second screw rod 7, and the side surfaces of the first nut seat 61 and the second nut seat 71 are tightly clung to the baffle 8 and are limited by the baffle 8, so that the first nut seat 61 can only translate on the rotating first screw rod 6 and cannot turn over, and the second nut seat 71 can only translate on the rotating second screw rod 7 and cannot turn over.

As shown in fig. 1, when it is necessary to closely overlap the light shielding portion 31 of the roll screen 3 to reduce the light transmittance of the roll screen 3, the first screw 6 may be kept still, and by rotating the second screw 7, the first plate 201 may be brought close to the adjacent second plate 202 (or vice versa), and correspondingly, the connection point of the first plate 201 and the roll screen 3 and the connection point of the second plate 202 and the roll screen 3 may be brought close to each other, so that the effect of shrinking the roll screen 3 may be achieved.

When the light shielding portion 31 of the roller shutter 3 needs to be stretched out to improve the light transmittance of the roller shutter 3, the first screw 6 is kept still, and the second screw 7 is rotated to separate the first plate 201 from the adjacent second plate 202 (or vice versa), so that the connection point of the first plate 201 and the roller shutter 3 and the connection point of the second plate 202 and the roller shutter 3 are separated from each other, thereby achieving the effect of stretching the roller shutter 3.

As shown in fig. 3, a plurality of electromagnets 16 with uniform intervals can be fixed on the hard plate at the top of the extension portion 32 of the roller shutter 3, and after the electromagnets 16 are electrified, the adjacent electromagnets 16 attract each other, so that the extension portion 32 can be ensured to be tightly contracted and overlapped and hidden at the side portion in the frame 1. The user can press the switch before adjusting the transmittance of the roller shutter 3, and electrifies the electromagnets 16, and the extension parts 32 of the roller shutter 3 shrink under the action of mutual attraction between the electromagnets 16, so that the light shielding parts 31 of the roller shutter 3 stretch, and the effect of improving the transmittance of the roller shutter 3 can be achieved; after the electromagnet 16 is powered off, the extension part 32 of the roller shutter 3 is not attracted by magnetic force, and the extension part 32 can extend to the light shielding part 31, so that the light shielding part 31 is tightly contracted, and the effect of reducing the light transmittance of the roller shutter 3 is achieved.

As shown in fig. 4, the retractor 5 includes a roller shaft 50, the roller shaft 50 is composed of a shaft core 52 and a shaft sleeve 51, the shaft sleeve 51 is sleeved on the shaft core 52, and the shaft sleeve 51 is rotatable relative to the shaft core 52. The shaft sleeve 51 is horizontally fixedly connected with the bottom of the roller shutter 3, a first sprocket 91 is fixed at the end part of the shaft sleeve 51, a second sprocket 92 is fixed at the top part in the frame 1, and the first sprocket 91 is connected with the second sprocket 92 through a chain 93.

Referring to fig. 4 and 5, a first shaft 101 is fixed on the second sprocket 92, the first shaft 101 is rotatably fixed on the frame 1 through a bearing 17, a pull rope 103 is wound on the first shaft 101, one end of the pull rope 103 is fixed on the first shaft 101, the other end of the pull rope extends to the bottom of the frame 1, a small hole is formed in the frame 1, and the pull rope 103 penetrates out of the frame 1 from the small hole to be connected with a second shaft 102.

As shown in fig. 5, the second rotating shaft 102 is rotatably fixed to the outside of the frame 1 through a bearing 17, and the pulling rope 103 is fixed to and wound around the second rotating shaft 102, and the gear 12 is fixed to the second rotating shaft 102. The outer side of the frame 1 is provided with a housing 11, and the housing 11 houses the second rotating shaft 102 and the second gear 12 therein.

As shown in fig. 6, a limiting hole 111 is formed in the side surface of the housing 11, a sleeve 13 is matched in the limiting hole 111, the shape of the side surface of the sleeve 13 is matched with that of the limiting hole 111, and the sleeve 13 can be pulled and moved in the limiting hole 111. The center of the sleeve 13 is provided with a through hole 131 along the axis direction, a push rod 14 is arranged in the through hole 131, one end of the push rod 14 is fixedly provided with a rotary cap 141, the other end of the push rod 14 is fixedly provided with a helical tooth block 142 propped against the teeth of the gear 12, one end of the sleeve 13 facing the outside of the housing 11 is provided with a pair of first grooves 132 symmetrical about the through hole 131, one end facing the inside of the housing 11 is provided with a second groove 133, a spring 15 used for propping against the helical tooth block 142 is further arranged in the second groove 133, and the spring 15 is sleeved on the push rod 14. The screw cap 141 is provided with a plug 1411 which can be inserted into the first groove 132, and when the screw cap 141 is rotated 180 degrees, the plug 1411 can be inserted into the other first groove 132, and the helical gear block 142 is rotated 180 degrees and positioned.

As shown in fig. 6, when the inclined surface of the helical gear block 142 is opposite to the rotation direction of the gear 12, the helical gear block 142 cannot support against the gear 12, the gear 12 can rotate normally, and the helical gear block 142 is ejected from the tooth slot when the gear 12 rotates, and then the spring 15 ejects the helical gear block 142 to the next tooth slot of the gear 12; pulling the cap 141 outward, causing the spigot 1411 to disengage from the first recess 132, then rotating the cap 141 180 ° (i.e., rotating the helical block 142 180 °), and inserting the spigot 1411 into the other first recess 132, wherein the bevel of the helical block 142 is opposite to the direction of rotation of the gear 12, the helical block 142 can bear against the gear 12, the gear 12 cannot rotate, and the gear 12 can continue to rotate in that direction only when the cap 141 is rotated 180 ° again to reset the helical block 142 to the direction of rotation of the gear 12.

By the above-mentioned abutting action of the helical gear block 142 and the gear 12, when the roller shaft 50 rises to a certain height to stop rotation, the gear 12 does not rotate reversely, namely, the second rotating shaft 102 does not rotate reversely, and because the pull rope 103 is connected with the second rotating shaft 102 and the first rotating shaft 101, the first rotating shaft 101 does not rotate reversely, and because the chain 93 is connected with the second chain wheel 92 and the first chain wheel 91, and the second chain wheel 92 is coupled with the first rotating shaft 101, the first chain wheel 91 does not rotate reversely, namely, the shaft sleeve 51 does not rotate reversely, the roller 3 wound on the shaft sleeve 51 does not discharge, and therefore, the roller shaft 50 can not fall at the height, and the roller shaft 50 can only fall down when the rotating cap 141 is rotated reversely, thereby achieving the effect of opening or closing the window.

Example 2

As shown in fig. 7, unlike the roll screen 3 of example 1 having an L-shape in plan view, the roll screen 3 has a U-shape in plan view, and the roll screen 3 is integrally formed with a front shade 31a, a rear shade 31b, and an extension 32. The front light shielding portion 31a is disposed proximate to the front side glass 2 of the frame 1, the rear light shielding portion 31b is disposed proximate to the rear side glass 2 of the frame 1, and one ends of the front light shielding portion 31a and the rear light shielding portion 31b are both fixed to the left side in the frame 1, and the extension portion 32 is hidden to the right side in the frame 1. A pair of first plates 201 are fixed to the first nut seat 61 on the first screw 6 for connecting the front light shielding portion 31a and the rear light shielding portion 31b, respectively, and a pair of second plates 202 are also fixed to the second nut seat 71 on the second screw 7, and the second plates 202 are also connected to the front light shielding portion 31a and the rear light shielding portion 31b, respectively.

The above-described embodiments are provided for illustration only and not for limitation of the present invention, and modifications may be made to the embodiments without creative contribution by those skilled in the art after reading the present specification, as long as they are protected by patent laws within the scope of claims of the present invention.

Claims

1. The utility model provides a roll up built-in cavity glass of curtain of adjustable luminousness, includes frame (1) and inside roll up curtain (3), and glass (2), characterized by are equipped with to both sides around frame (1): the top of the roller shutter (3) is in a folded plate shape, a rolling device (5) for rolling the roller shutter (3) upwards from the bottom is arranged in the frame (1), the roller shutter (3) comprises a shading part (31) and an extending part (32) which are connected into a whole, the shading part (31) is parallel to the glass (2), the extending part (32) is contracted at the left/right side in the frame (1), a track (4) is arranged in the frame (1) along the extending direction of the roller shutter (3), and the top of the roller shutter (3) is connected with the track (4) in a matched manner and can extend or contract along the track (4); a rotatable first screw (6) and a rotatable second screw (7) are arranged in the frame (1), a plurality of first nut seats (61) connected with the roller shutter (3) are matched on the first screw (6), and the first nut seats (61) are connected with the top of the roller shutter (3) through a first plate (201); a plurality of second nut seats (71) connected with the roller shutter (3) are matched and arranged on the second screw rod (7), and the second nut seats (71) are connected with the top of the roller shutter (3) through a second plate (202); the first nut seats (61) and the second nut seats (71) are distributed in a staggered manner; and the first plates (201) and the second plates (202) are arranged in a staggered manner, the second plates (202) are arranged on two sides of each first plate (201), and the first plates (201) are arranged on two sides of each second plate (202).

2. The light transmittance-adjustable roll-up built-in hollow glass of claim 1, wherein: the two ends of the rolling curtain (3) are respectively fixed on the left side and the right side in the frame (1).

3. The light transmittance-adjustable roll-up built-in hollow glass of claim 1, wherein: the light shielding part (31) of the roller shutter (3) comprises a front light shielding part (31 a) and a rear light shielding part (31 b), and the extension part (32) is integrally connected between the front light shielding part (31 a) and the rear light shielding part (31 b).

4. The light transmittance-adjustable roll-up built-in hollow glass of claim 1, wherein: the track (4) comprises a guide shaft/line extending through the top of the roller blind (3).

5. The light transmittance-adjustable roll-up built-in hollow glass of claim 4, wherein: a partition plate (8) is arranged between the first screw (6) and the second screw (7), and the partition plate (8) is tightly attached to the first nut seat (61) and the second nut seat (71).

6. The light transmittance-adjustable roll-up built-in hollow glass of claim 1, wherein: the winding device (5) comprises a roll shaft (50), the roll shaft (50) comprises a shaft sleeve (51) and a shaft core (52), the shaft sleeve (51) is sleeved on the shaft core (52), the bottom of the roller shutter (3) is fixed on the shaft sleeve (51), a first chain wheel (91) is arranged at the end part of the shaft sleeve (51), a rotatable second chain wheel (92) is arranged on the frame (1), and the first chain wheel (91) is connected with the second chain wheel (92) through a chain (93).

7. The light transmittance-adjustable roll-up built-in hollow glass of claim 6, wherein: the frame (1) is provided with a rotatable first rotating shaft (101), the second chain wheel (92) is fixed on the first rotating shaft (101), the first rotating shaft (101) is fixed with a pull rope (103) and is wound with the pull rope (103), and the pull rope (103) extends to the bottom of the frame (1).

8. The light transmittance-adjustable roll-up built-in hollow glass of claim 7, wherein: be equipped with second pivot (102) on frame (1), stay cord (103) end is fixed in on second pivot (102), be equipped with gear (12) on second pivot (102), be equipped with spacing hole (111) on frame (1), spacing hole (111) internal fit is equipped with sleeve (13), sleeve (13) are equipped with perforation (131) rather than the axis parallel, be equipped with ejector pin (14) in perforation (131), ejector pin (14) one end is equipped with spiral cap (141), the other end is equipped with helical tooth piece (142) that support on gear (12), sleeve (13) one end is equipped with a pair of first recess (132) about perforation (131) symmetry, be equipped with on spiral cap (141) can insert spliced pole (1411) of first recess (132), sleeve (13) other end is equipped with second recess (133), be equipped with spring (15) that support helical tooth piece (142) in second recess (133).

9. The light transmittance-adjustable roll-up built-in hollow glass of claim 1, wherein: the top of the extension part (32) of the roller shutter (3) is provided with a plurality of electromagnets (16), and the adjacent electromagnets (16) are attracted to each other after being electrified.