Spectacles set with detachable shelter frame

A spectacles set includes a primary spectacle frame which comprises a pair of magnetic holders at two nose supports thereof and a detachable shelter frame adapted for mounting in front of the primary spectacle frame. The detachable shelter frame includes a shelter frame for supporting two auxiliary lenses and a pair of magnetic attachment arrangements connected to the shelter frame. Each of the magnetic attachment arrangements includes a supporting arm extending rearwardly from the shelter bridge for riding over a primary bridge of the primary spectacle frame so as to securely mount the shelter frame in front of the primary spectacle frame and a magnetic seat which is connected to the supporting arm and extended to magnetically attach the magnetic holder of the primary spectacle frame so as to hold the shelter frame on the primary spectacle frame in position.

BACKGROUND OF THE PRESENT INVENTION

1. Field of Invention

The present invention relates to spectacle frame, and more particularly to a spectacles set, which comprises a detachable shelter frame adapted for mounting on a primary spectacle frame by means of magnetic attraction.

2. Description of Related Arts

Shelter frames are widely used today. A conventional shelter frame, such as clip-on sunglasses, comprises a plurality of clipping claws for detachably mounted on a shortsighted or farsighted sunglasses so that the wearer does not need to carry and pay for another pair of shortsighted or farsighted sunglasses. However, the metal made clipping claws may scratch the lenses of the primary eyeglasses during the attaching operation. Also, the wearer requires both hands to align and engage the conventional clip-on sunglasses on the primary eyeglasses in correct position. It is troublesome and dangerous for a wearer to use his or her both hands to wear such clip-on sunglasses on the regular glasses while he or she is driving.

In order to solve the problem of the above mentioned clip-on sunglasses, magnetic attachment is recently introduced into the eyeglasses industry, such as U.S. Pat. Nos. 5,416,537, 5,568,207, 5,642,177, 5,737,054, and 5,975,691. For example, in U.S. Pat. No. 5,568,207, a primary pair of magnet members is affixed on two side extensions of a primary spectacle frame respectively. A shelter frame, such as sunglasses, includes a pair of arms for resting over the upper side extensions for preventing the shelter frame from moving downward relative to the primary spectacle for engaging with the primary magnet members of the primary spectacle frame so as to stably attach the shelter frame to the primary spectacle frame. However, the users have to align two pairs of magnet members. If the auxiliary magnet members of the sunglasses are misaligned with the primary magnet members of the primary spectacle frame, the sunglass will fall down from the primary spectacle frame easily.

Moreover, the magnet members are firmly affixed to the spectacle frame of the primary spectacle. Once the spectacle frame is accidentally bent its shape, the shelter frame may not precisely mounted on the primary spectacle by means of the magnet attachment. Furthermore, the spectacle frame of the primary spectacle must be altered to fit the magnet members thereto such that the magnet members will destroy the aesthetic appearance of the primary spectacle.

SUMMARY OF THE PRESENT INVENTION

A main object of the present invention is to provide a spectacles set which comprises a detachable shelter frame adapted for precisely and easily magnetically attaching on and detaching from a primary spectacle frame.

Another object of the present invention is to provide a spectacles set which comprises a detachable shelter frame adapted for precisely and easily mounting on a primary spectacle frame by means of magnetic attachment arrangement without the risk of scratching the lenses of the primary spectacle frame.

Another object of the present invention is to provide a spectacles set with detachable shelter frame, wherein the magnetic attachment arrangement is hidden behind the frame body of the primary spectacle frame and located at the nose supports of the primary spectacle frame so as to keep the aesthetic appearance of the primary spectacle frame.

Another object of the present invention is to provide a spectacles set with detachable shelter frame, wherein the nose supports are adapted to be adjusted their positions with respect to the primary spectacle frame in order to fit the wearer, the wearer may self-adjust the magnetic attachment arrangement to align with the detachable shelter frame even the shape of the primary spectacle frame is slightly distorted.

Another object of the present invention is to provide a spectacles set with detachable shelter frame, wherein two supporting arms of the magnetic attachment arrangement ride on a primary bridge of the primary spectacle, so as to support the detachable shelter frame and further prevent the downward and sideward movement of the detachable shelter frame with respect to the primary spectacle frame.

Another object of the present invention is to provide a spectacles set with detachable shelter frame, wherein the two supporting arms of the magnetic attachment arrangement are further extended downwardly to mount on the primary bridge of the primary spectacle so as to further prevent any frontward or rearward movement of the detachable shelter frame with respect to the primary spectacle frame.

Another object of the present invention is to provide a spectacles set, wherein the wearer may merely use one hand to attach or detach the detachable shelter frame during exercising or driving.

Another object of the present invention is to provide a spectacles set, which does not require to change the original structural design of the primary spectacle frame. It is another object in one embodiment of a spectacles set with detachable shelter frame of the present invention, wherein no magnet is needed to embed into the primary spectacle frame such that no magnetic field is generated around the primary spectacle frame to affect the wearer's health while he or she normally wears the primary spectacle frame.

Accordingly, in order to accomplish the above objects, the present invention provides a spectacles set comprising a primary spectacle frame and a detachable shelter frame adapted for mounting in front of the primary spectacle frame.

The primary spectacle frame comprises a frame body for mounting a pair of lenses in position, wherein the frame body comprises a primary bridge connected between the two lenses, two nose supports attached at two inner sides of the lenses respectively, two magnetic holders each of which has magnetic attraction ability being provided at the two nose supports respectively, and two side extensions provided at two outer sides of the lenses for coupling a pair of temples respectively.

The detachable shelter frame comprises a shelter frame for supporting two auxiliary lenses and a pair of magnetic attachment arrangements connected to the shelter frame, wherein each of the magnetic attachment arrangements comprises a supporting arm extending rearwardly from an inner side of the shelter frame towards the respective magnetic holder for riding on the primary bridge so as to securely mount the shelter frame in front of the primary spectacle frame and a magnetic seat which is connected to the supporting arm and extended to magnetically attach the respective magnetic holder of the primary spectacle frame so as to hold the shelter frame on the primary spectacle frame in position.

In a preferred embodiment of the present invention, the shelter frame includes a shelter bridge connected between the two auxiliary lenses and each of the supporting arms of the magnetic attachment arrangements has a riding portion rearwardly extended from the shelter bridge for riding on the primary bridge of the primary spectacle frame and a mounting portion downwardly extended from the riding portion to support the magnetic seat thereof to attach with respective magnetic holder of the primary spectacle frame.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1 of the drawings, a spectacles set according to a preferred embodiment of the present invention is illustrated, wherein the spectacles set comprises a primary spectacle frame 10 and a detachable shelter frame 20 adapted for detachably mounting in front of the primary spectacle frame 10 .

The primary spectacle frame 10 , such as a conventional spectacle frame, comprises a frame body 11 for mounting a pair of lenses 121 , 122 in position. The frame body 11 comprises a primary bridge 111 connected between the two lenses 121 , 122 respectively, two nose supports 15 , 16 are attached to two inner sides of the lenses 121 , 122 respectively, and two side extensions 171 , 172 provided at two outer sides of the lenses 121 , 122 respectively wherein each of the two side extensions 171 , 172 has a hinge portion 181 , 182 extended rearwardly therefrom for pivotally coupling a temple 191 , 192 .

Each of the nose supports 15 , 16 includes a supporting member 150 , 160 and an extension arm 151 , 161 which has a distal end portion detachably connected to the supporting member 150 , 160 and a root end portion integrally attached to the primary spectacle frame 10 . As shown in FIG. 1 , each of the root end portions of the extension arms 151 , 161 forms a magnetic holder 152 , 162 having a magnetic attraction ability.

The frame body 11 of the primary spectacle frame 10 can be constructed as the conventional spectacle frame to have a pair of lens rims 110 , as shown in FIG. 1 , or the rimless frame that the primary bridge 111 and two side extensions 171 , 172 are directly fastened to the edges of the two lenses 121 , 122 .

According to the preferred embodiment as shown in FIG. 1 , the two extension arms 151 , 161 are integrally and rearwardly extended from the frame body 11 wherein each of the magnetic holders 152 , 162 is provided at the two root end portions of the extension arms 151 , 161 of the nose supports 15 , 16 respectively. In other words, the primary spectacle frame 10 does not require modifying its original structure for mounting the detachable shelter frame 20 thereon.

At least a top portion of each of the magnetic holders 152 , 162 is made of a kind of metal having magnetic attraction ability such as mild steel, low carbon steel and high grade steel, which is attractive to magnetic material such as permanent magnet. According to preferred embodiment, each of the magnetic holders 152 , 162 further comprises an interlocking member 153 , 163 upwardly protruded, which can be a magnet planted on top of the respectively magnetic holder 152 , 162 or integrally formed with the respective magnetic holder 152 , 162 by such magnetic attracting metal.

The detachable shelter frame 20 comprises a shelter frame 21 for supporting two auxiliary lenses 221 , 222 . The shelter frame 21 comprises a shelter bridge 211 extended between the two auxiliary lenses 221 , 222 and a pair of magnetic attachment arrangements 24 , 25 connected to the shelter frame 21 for holding the shelter frame 21 in front of the primary spectacle frame 10 in position.

As shown in FIG. 1 , each of the magnetic attachment arrangement 24 , 25 comprises a supporting arm 241 , 251 extending rearwardly from the shelter frame 21 to a position towards the respective magnetic holder 152 , 162 of the primary spectacle frame 10 when the detachable shelter frame 20 is mounted in front of the primary spectacle frame 10 , and a magnetic seat 242 , 252 which is connected to the supporting arm 241 , 242 and arranged to magnetically attach to the magnetic holder 152 , 162 of the primary spectacle frame 10 so as to hold the shelter frame 21 of the detachable shelter frame 20 on the frame body 11 of the primary spectacle frame 10 in position.

Each of the magnetic seats 242 , 252 comprises a magnetic housing 243 , 253 rearwardly extended from the respective supporting arm 241 , 251 wherein each magnetic seat 242 , 252 is made of non-magnetic material or soft-magnetic metal having magnetic attraction ability such as mild steel, low carbon steel and high grade steel and a magnet 244 , 254 mounted in the magnetic housing 243 , 253 , which is arranged to face toward and align with the respective magnetic holder 152 , 162 of the shelter frame 21 when the detachable shelter frame 20 is mounted in front of the primary spectacle frame 10 .

According to the preferred embodiment, the two supporting arms 241 , 251 are in L-shaped and extended from two end portions of the shelter bridge 211 , wherein each of the supporting arms 241 , 251 comprises a riding portion 2411 , 2511 rearwardly extended from the shelter bridge 211 to ride on the primary bridge 111 and a mounting portion 2412 , 2512 downwardly and integrally extended from a rear end of the respective riding body 2411 , so that the riding portions of the supporting arms 241 , 251 are capable of substantially riding on the primary bridge 111 when the detachable shelter frame 20 is mounted in front of the primary spectacle frame 10 so as to support the detachable shelter frame 20 and further prevent any downward and sideward movement of the detachable shelter frame 20 with respect to the primary spectacle frame 10 . In addition, the two mounting portions 2412 , 2512 of the two supporting arms 241 , 251 of the magnetic attachment arrangement 24 , 25 are further extended downwardly to mount on the primary bridge 111 of the primary spectacle that may further prevent any frontward or rearward movement of the detachable shelter frame 20 with respect to the primary spectacle frame 10 , so that besides the magnetic attachment between the two magnetic seats 242 , 252 and the two magnetic holders 152 , 162 respectively, the detachable shelter frame 20 can further be securely mounted and supported on the primary spectacle frame 10 .

Referring to FIGS. 2 and 3 , a first alternative mode of the above preferred embodiment is illustrated, which magnetic attachment arrangements 24 , 25 are the same as the above preferred embodiment. However, each of the two nose supports 15 A, 16 A alternatively comprises a supporting member 150 A, 160 A and a magnetic holder 152 A, 162 A which comprises a holder member 152 A- 1 , 162 A- 1 and a magnetic member 152 A- 2 , 162 A- 2 . The two holder members 152 A- 1 , 162 A- 1 are formed by horizontally extending and bending the two root end portions of the extension arms 151 A, 161 A of the nose supports 15 A, 16 A to form two U-shaped loop portions respectively. The two magnetic members 152 A- 2 , 162 A- 2 are made of either magnets or a kind of metal having magnetic attraction ability such as mild steel, low carbon steel and high grade steel that is attractive to magnetic material such as permanent magnet. Each of the magnetic members 152 A- 2 , 162 A- 2 has a narrowed neck 152 A- 3 , 162 A- 3 for engaging between two arms of the respective U-shaped loop portion, i.e. the holder members 152 A- 1 , 162 A- 1 .

According to the preferred embodiment and the first alternative mode thereof, each magnet 244 , 254 has a thickness smaller than a depth of the respective magnetic housing 243 , 253 so as to define an engaging groove 245 , 255 , as shown in FIG. 3 , when the magnet 244 , 254 is embedded in the magnetic housing 243 , 253 for fittedly engaging with the interlocking member 153 , 163 or the magnetic member 153 A, 163 A of the respective magnetic holder 152 , 162 , 152 A, 162 A. In other words, the two interlocking members 153 , 163 or the magnetic members 153 A, 163 A are received in the two engaging grooves 245 , 255 , so as to further guide the two magnetic attachment arrangement 24 , 25 to magnetically attach to the two magnetic holder 152 , 162 , 152 A, 162 A.

Referring to FIGS. 4 and 5 , a second alternative mode of the above preferred embodiment of the present invention is illustrated. The primary spectacle frame 10 has the same structure except the two magnetic holders 152 , 162 are alternatively made from the two extension arms 151 , 161 respectively, wherein each of the extension arms 151 , 161 is made in reverse U-shape to form two top shoulders to function as the two magnetic holders 152 , 162 respectively.

Correspondingly, the detachable shelter frame 20 also comprises a shelter frame 21 for supporting two auxiliary lenses 221 , 222 and a pair of magnetic attachment arrangements 24 , 25 connected to the shelter frame 21 wherein each of the magnetic attachment arrangements 24 , 25 comprises a supporting arm 241 , 251 extending rearwardly from a shelter bridge 211 of the shelter frame 21 for riding on the primary bridge 111 so as to securely mount the shelter frame 21 in front of the primary spectacle frame 10 and a magnetic seat 242 , 252 which is connected to the supporting arm 241 , 251 and arranged to magnetically attach to the magnetic holder 151 , 161 of the primary spectacle frame 10 so as to hold the shelter frame 21 of the detachable shelter frame 20 on the frame body 11 of the primary spectacle frame 10 in position.

As shown in FIG. 4 , each of the supporting arms 241 , 251 has a L-shaped and comprises a riding portion 2411 , 2511 rearwardly extended from the shelter bridge 211 to ride on the primary bridge 111 of the frame body 10 and a mounting portion 2412 , 2512 downwardly and integrally extended from a rear end of the respective riding portion 2411 , 2511 towards the magnetic holders 152 , 162 of the primary spectacle frame 10 respectively. In other words, when the shelter frame 21 is mounted in front of the primary spectacle frame 10 , the riding portions 2411 , 2511 of the supporting arms 241 , 251 ride over the primary bridge 111 while the mounting portions 2412 , 2512 downwardly extend behind the primary bridge 111 and toward the magnetic holders 152 , 162 respectively, so as to mount the detachable shelter frame 20 in front of the primary spectacle frame 10 .

As shown in FIG. 5 , the magnetic seats 242 , 252 are connected to bottom ends of the mounting portions 2412 , 2512 of the supporting arms 241 , 251 respectively to magnetically attach to the magnetic holders 152 , 162 of the primary spectacle frame 10 . Accordingly, the two supporting arms 241 , 251 also function as a bridge clip to ride on top of the primary bridge 111 of the frame body 11 for engaging with the primary bridge 111 so as to securely interlock the shelter frame 21 in front of the primary spectacle frame 10 by preventing any upward, downward, leftward, and rightward movement of the shelter frame 21 .

Each of the magnetic seats 242 , 252 comprises a magnetic housing 243 , 253 downwardly and suspendedly affixed to the bottom end of the mounting portion 2412 of the respective supporting arm 241 , 251 , wherein each magnetic housing 243 , 253 is a reverse U-shaped body defining an engaging groove 245 , 255 . Each of the magnetic housing 243 , 253 is made of non-magnetic material or soft-magnetic metal having magnetic attraction ability such as mild steel, low carbon steel and high grade steel.

Each of the magnetic seats 242 , 252 further comprises a magnet 244 , 254 mounted at the bottom of the engaging groove 245 , 255 of the magnetic housing 243 , 253 . In order to mount the detachable shelter frame 20 in front of the primary spectacle frame 10 , the magnetic seats 242 , 252 are attached to the two magnetic holders 152 , 162 by engaging the two top shoulders of the two magnetic holders 152 , 162 in the two engaging grooves 245 , 255 respectively. In addition, when the magnets 244 , 254 are mounted in the magnetic housing 243 , 253 , the magnet fields present around the two magnets 244 , 254 not only guide the magnetic seats 242 , 252 toward and align with the magnetic holders 152 , 162 but also ensure the magnetic seats 242 , 252 firmly attached with the magnetic holders 152 , 162 , as shown in FIG. 5 .

Referring to FIG. 6 , a third alternative mode of the above preferred embodiment of the present invention is illustrated, which is a combination of the above preferred embodiment and its second alternative mode, wherein the two magnetic attachment arrangements 24 , 25 of the third alternative mode as shown in FIG. 6 are the same as the above preferred embodiment as shown in FIGS. 1 and 2 and the two magnetic holders 152 , 162 of the two nose supports 15 , 16 are similar to the above second alternative mode as shown in FIGS. 4 and 5 . In addition, two engaging members 153 , 163 made of magnetically attachable material are upwardly protruded on the two reverse U-shaped top shoulder of the two magnetic holders 152 , 162 respectively.

Similarly, each magnet 244 , 254 has a thickness smaller than a depth of the respective magnetic housing 243 , 253 so as to define an engaging groove 245 , 255 at a bottom end of the respective magnetic housing 243 , 253 , so that the magnet 244 , 254 is embedded in the magnetic housing 243 , 253 for fittedly engaging with the respective engaging member 153 , 163 . In other words, the magnetic holders 152 , 162 are received in the two engaging grooves 245 , 255 respectively to further guide the two magnetic attachment arrangements 24 , 25 to magnetically attach to the two magnetic holders 152 , 162 respectively.

Referring to FIG. 7 , a fourth alternative mode of the above preferred embodiment of the present invention is illustrated, wherein the magnetic holders 152 B, 162 B are also made from the two extension arms 151 B, 161 B respectively, wherein each of the extension arms 151 B, 161 B is made in reverse U-shape to form a top shoulder to function as the magnetic holder 152 B, 162 B. However, the two top shoulders of the magnetic holders 152 B, 162 B according to the fourth alternative mode are embodied as ring shape holders made of magnetically attractable materials as described above, wherein a holder hole 153 B, 163 B is formed on each of the magnetic holders 152 B, 162 B.

Correspondingly, each of the two magnetic attachment arrangements 24 B, 25 B comprises a supporting arm 241 B, 251 B extended rearwardly from the shelter bridge 211 B of the shelter frame 21 B for riding on the primary bridge 111 B so as to securely mount the shelter frame 21 B in front of the primary spectacle frame 10 B and a magnetic seat 242 B, 252 B which is a magnet and connected to the supporting arm 241 B, 251 B and arranged to magnetically attach to the magnetic holder 152 B, 162 B of the primary spectacle frame 10 B so as to hold the shelter frame 21 B of the detachable shelter frame 20 B on the frame body 11 B of the primary spectacle frame 10 B in position.

Each of the magnetic seats 242 B, 252 B further comprises an engagement tip 243 B, 253 B integrally protruded from a bottom end thereof, wherein each of the engagement tips 243 B, 253 B has a diameter smaller than the magnetic seat 242 B, 252 B and slightly smaller than the holder hole 153 B, 163 B. The engagement tips 243 B, 253 B can be made of magnets. The engagement tips 243 B, 253 B can also be made of metal having magnetic attraction ability, such as mild steel, low carbon steel and high grade steel, when the magnetic seats 242 B, 252 B are made of magnet.

Similarly, when the shelter frame 21 B is mounted in front of the primary spectacle frame 10 B, the riding portions 2411 B, 2511 B of the supporting arms 241 B, 251 B ride over the primary bridge 111 B while the mounting portions 2412 B, 2512 B downwardly extend behind the primary bridge 111 B and toward the magnetic holders 152 B, 162 B respectively, so as to mount the detachable shelter frame 20 B in front of the primary spectacle frame 110 B, wherein the two magnetic seats 242 B, 252 B magnetically attract with the two magnetic holders 152 B, 162 B respectively and, in addition, the two engagement tips 243 B, 253 B are inserted into the two holder holes 153 B, 163 B respectively so as to firmly engaged the magnetic holders 152 B, 162 B with the two magnetic holders 152 B, 162 B, so that the detachable shelter frame 20 B can be firmly attached to the primary spectacle frame 10 B that avoids any sideward movement of the detachable shelter frame 20 B with respect to the primary spectacle frame 10 B until the shelter frame 21 B is manually lifted up to detach from the primary spectacle frame 10 B.

Referring to FIG. 8 , a fifth alternative mode of the above preferred embodiment of the present invention is illustrated, wherein the magnetic holders 152 C, 162 C of the two nose supports 15 C, 16 C are also made from the two extension arms 151 C, 161 C respectively, wherein each of the extension arms 151 C, 161 C has a reverse U-shape that forms an upper loop portion. Each of the magnetic holders 152 C, 162 C comprises a holder member 152 C- 1 , 162 C- 1 which is the reversed U-shaped upper loop portion of the extension arm 151 C, 161 C and a magnetic member 151 C- 2 , 161 C- 2 firmly mounted on the respective holder member 152 C- 1 , 162 C- 1 .

The two magnetic members 152 C- 2 , 162 C- 2 are circular bodies made of either magnets or a kind of metal having magnetic attraction ability. The holder members 152 C- 1 , 162 C- 1 are engaged around the magnetic members 152 C- 2 , 162 C- 2 so as to support the two magnetic members 152 C- 2 , 162 C- 2 in position wherein an attraction surface of each of the magnetic members 152 C- 2 , 162 C- 2 is facing outwards. Each of the magnetic members 152 C- 2 , 162 C- 2 can be adjusted to a vertical position or an inclined position with a desired angle by bending the respective extension arms 151 C, 161 C.

Correspondingly, each of the two magnetic attachment arrangements 24 C, 25 C comprises a supporting arm 241 C, 251 C extended rearwardly from the shelter bridge 21 IC of the shelter frame 21 C for riding on the primary bridge 111 C so as to securely mount the shelter frame 21 C in front of the primary spectacle frame 10 C and a magnetic seat 242 C, 252 C connected to the supporting arm 241 C, 251 C. Each of the magnetic seats 242 C, 252 C comprises a magnetic housing 243 C, 253 C and a magnet 244 C, 254 C embedded in the magnetic housing 243 C, 253 . Corresponding to the vertical or inclined position of the two magnetic holders 152 C, 162 C, the magnetic seats 242 C, 252 C are supported either vertically or inclinedly with the magnets 244 C, 254 C facing inwards to magnetically attach to the attraction surfaces of the two magnetic members 152 C- 2 , 162 C- 2 of the two magnetic holders 152 C, 162 C of the primary spectacle frame 10 C so as to hold the shelter frame 21 C of the detachable shelter frame 20 C on the frame body 11 C of the primary spectacle frame 10 C in position.

Similarly, when the shelter frame 21 C is mounted in front of the primary spectacle frame 10 C, the riding portions 2411 C, 2511 C of the supporting arms 241 C, 251 C ride over the primary bridge 111 C while the mounting portions 2412 C, 2512 C downwardly extend behind the primary bridge 111 C and toward the magnetic holders 152 C, 162 C respectively, so as to mount the detachable shelter frame 20 C in front of the primary spectacle frame 10 C while the two magnetic seats 242 C, 252 C magnetically attract with the two magnetic holders 152 C, 162 C respectively.

Referring to FIG. 9 , a sixth alternative mode of the above preferred embodiment of the present invention is illustrated, which has a similar structure of the above fifth alternative mode except the magnetic holders 152 D, 162 D which are made from the two extension arms 151 D, 161 D respectively are arranged in a bottom position of the two nose supports 15 D, 16 D. In which, each of the extension arms 151 D, 161 D of the nose supports 15 D, 16 D of the primary spectacle frame 10 D has a U-shape that forms a lower loop portion. Similarly, each of the magnetic holders 152 D, 162 D comprises a holder member 152 D- 1 , 162 D- 1 which is the U-shaped lower loop portion of the extension arm 151 D, 161 D and a magnetic member 151 D- 2 , 161 D- 2 firmly mounted on the respective holder member 152 D- 1 , 162 D- 1 .

Correspondingly, the two magnetic seats 242 D, 252 D of the shelter frame 21 D of the detachable shelter frame 20 D, each having the same structure as that of the above fifth alternative mode as shown in FIG. 8 , is lowered from the two mounting portions 2412 D, 2512 D of the two supporting arms 241 D, 251 D to effectively attract with the two magnetic holders 152 D, 162 D respectively.

Referring to FIG. 10 , a seventh alternative mode of the above preferred embodiment is illustrated, which magnetic attachment arrangements 24 E, 25 E are similar to the above preferred embodiment except being embodied in rectangular shape. Each of the magnetic attachment arrangements 24 E, 25 E includes a supporting arm 241 E, 251 E and a magnetic seat 242 E, 252 E integrally extended from the supporting arm 241 E, 251 E, wherein each of the magnetic seats 242 E, 252 E comprises a magnetic housing 243 E, 253 E and a magnet 244 E, 254 E received therein. Each of the two nose supports 15 E, 16 E comprises a supporting member 150 E, 160 E and an extension arm 151 E, 161 E extended between the supporting member 150 E, 160 E and the primary spectacle frame 10 E for supporting the supporting member 150 E, 160 E.

However, the two magnetic holders 152 E, 162 E are provided at an upper portion of the two extension arms 151 E, 161 E of the two nose supports 15 E, 16 E. Each of the magnetic holders 152 E, 162 E is a small holder member integrally connected to the upper portion of the respective extension arm 15 E, 16 E and has an attraction surface facing upwards. The magnetic holders 152 E, 162 E can be made of magnets or a kind of metal having magnetic attraction ability with magnets. Therefore, to securely mount the shelter frame 21 E in front of the primary spectacle frame 10 E, the supporting arms 241 E, 251 E extend rearwardly from the shelter bridge 211 E of the shelter frame 21 E of the detachable shelter frame 20 E for riding on the primary bridge 11 E of the primary spectacle frame 10 E and the two magnetic seats 242 E, 252 E are magnetically attracted with the two magnetic holders 152 E, 162 E.

When the magnetic holders 152 E, 162 E is made of non-magnetic material, a magnet 153 E, 163 E can be embedded on each of the magnetic seats 152 E, 162 E for magnetically attracting with the magnetic seats 242 E, 252 E.

Referring to FIG. 11 , an eighth alternative mode of the above preferred embodiment of the present invention is illustrated, wherein the two magnetic attachment arrangements 24 F, 25 F of the shelter frame 21 F of the detachable shelter frame 20 F are same of the above preferred embodiment except that each of the two riding portions 2411 F, 2511 F comprises a section of elastic element 2411 F- 1 , 2511 F- 1 to provide elastic ability for better holding the detachable shelter frame 20 F in position by pulling the detachable shelter frame 20 F towards the primary spectacle frame 10 F after the detachable shelter frame 20 F is mounted in front of the primary spectacle frame 10 F.

The magnetic holders 152 F, 162 F of the eighth alternative mode as shown in FIG. 11 are alternatively modified from the above preferred embodiment, wherein the magnetic holders 152 F, 162 F are built in the two supporting members 150 F, 160 F of the two nose supports 15 F, 16 F respectively so that when the two supporting members 150 F, 160 F are fastened to the end holders 151 F- 1 , 161 F- 1 of the two extension arms 151 F, 161 F respectively, the two magnetic holders 152 F, 162 F are also provided at an upper portion of the nose supports 15 F, 16 F.

As shown in FIG. 11 , each of the magnetic holders 152 F, 162 F comprises a holder member 152 F- 1 , 162 F- 2 protruded from an inner side of the respective supporting member 150 F, 160 F and a connecting member 152 F- 2 , 162 F- 2 for detachably fastening to the respective end holder 151 F- 1 , 161 F- 1 . When the holder members 152 F- 1 , 162 F-I are made of magnetic attraction material, the magnetic seats 242 F, 252 F can be attracted thereto corresponding. In addition, each of the magnetic holders 152 F, 162 F further comprises an interlocking member 153 F, 163 F upwardly protruded from the holder member 152 F- 1 , 162 F-i for further engaging with the magnetic seats 242 F, 252 F.

In view of above, a conventional spectacle frame can be used as the primary spectacle frame 10 F of the present invention by using the supporting members 150 F, 160 F that provide with the magnetic holders 142 F, 152 F.

Referring to FIG. 12 , a ninth alternative mode of the above preferred embodiment is disclosed to illustrate how to apply the magnetic attachment arrangements 24 G, 25 G of the present invention to a rimless detachable shelter frame 20 G and the magnetic holders 152 G, 162 G of the present invention to a rimless primary spectacle frame 10 G, wherein the attraction and engagement concept and structure of the ninth alternative mode is same as the above preferred embodiment. The detachable shelter frame 20 G in the above embodiment and its alternative modes can also be used for mounting in front of the rimless primary spectacle frame 10 G, wherein the two side extensions 171 G, 172 G and the primary bridge 111 G are directly fastened to the edges of the two lenses 121 G, 122 G.

The primary bridge 111 G is connected between the two lenses 121 G, 122 G by means of two nuts for fastening two ends of the primary bridge 111 G at two edges of the lenses 121 G, 122 G respectively. The two nose supports 14 G, 15 G comprises a supporting member 150 G, 160 G, an extension arm 151 G, 161 G, and a magnetic holder 152 G, 162 G. Each of the extension arms 151 G, 161 G has one end connected to the primary bridge 111 G and another end downwardly extended from the primary bridge 111 G to form a U-shaped end holder 151 G- 1 , 161 G- 1 , such as a conventional spectacle frame, for holding the holding head of the supporting member 150 G, 160 G in position.

The magnetic holders 152 G, 162 G are built in the two supporting members 150 G, 160 G of the two nose supports 15 G, 16 G respectively so that when the two supporting members 150 G, 160 G are fastened to the end holders 151 G- 1 , 161 G- 1 of the two extension arms 151 G, 161 G respectively, said two magnetic holders 152 G, 162 G are mounted in position at the same time. Each of the magnetic holders 152 G, 162 G comprises a holder member 152 G- 1 , 162 G- 2 which is protruded from an inner side of the respective supporting member 150 G, 160 G and made of magnet or a kind of metal having magnetic attraction ability such as mild steel, low carbon steel and high grade steel, which is attractive to magnetic material such as permanent magnet.

The rimless detachable shelter frame 20 G comprises a shelter frame 21 G which merely comprises a shelter bridge 211 G which two ends formed two mounting loops 212 G, 213 G and continuously extended rearwardly to form the two L-shaped supporting arms 241 G, 251 G of the two magnetic attachment arrangements 24 G, 25 G. The shelter bridge is supported and extended between two shelter lenses 221 G, 222 G by fastening the two mounting loops 212 G, 213 G at two inner sides of the two shelter lenses 221 G, 222 G respectively.

Each of the magnetic attachment arrangements 24 G, 25 G also comprises a magnetic seats 242 G, 252 G which includes a magnet holder 242 G- 1 , 252 G- 1 and a magnet element 242 G- 2 , 252 G- 2 . Each of the supporting arms 241 G, 251 G includes a riding portion 241 G- 1 , 251 G- 1 integrally and rearwardly extended from the respective mounting loop 212 G, 213 G and a mounting portion 241 G- 2 , 251 G- 2 downwardly extended from the riding portion 241 G- 1 , 251 G- 1 . The bottom ends of the two mounting portions 241 G- 2 , 251 G- 2 form two U-shaped holding loops to function as the magnet holders 242 G- 1 , 252 G- 1 respectively. The two magnet elements 242 G- 2 , 252 G- 2 are circular bodies made of magnets. The magnet holders 242 G- 1 , 252 G- 1 are engaged around the magnet elements 242 G- 2 , 252 G- 2 so as to support the two magnet elements 242 G- 2 , 252 G- 2 in position wherein an attraction surface of each of the magnet elements 242 G- 2 , 252 G- 2 is facing inwards. Each of the magnet elements 242 G- 2 , 252 G- 2 can be adjusted to a vertical position or an inclined position with a desired angle by bending the respective supporting arms 241 G, 251 G so as to match with the corresponding positions of the two magnetic holders 152 G, 162 G.

To securely mount the detachable shelter 20 G in front of the primary spectacle frame 10 G, the two supporting arms 241 G, 251 G are extended rearwardly to ride on the primary bridge 111 G and the magnetic seats 242 G, 252 G are supported either vertically or inclinedly with the magnet elements 242 G- 2 , 252 G- 2 facing inwards to magnetically attach to the attraction surfaces of the two magnetic members 152 G- 2 , 162 G- 2 of the two magnetic holders 152 G, 162 G of the primary spectacle frame 10 G so as to hold the shelter frame 21 G of the detachable shelter frame 20 G on the frame body 11 G of the primary spectacle frame 10 G in position.

In view of above, a conventional rimless spectacle frame can be used as the primary spectacle frame 10 G of the present invention by using the supporting members 150 G, 160 G that provide with the magnetic holders 142 G, 152 G.

While the foregoing description and diagram describe the preferred embodiment and its alternatives, it should be appreciated that certain obvious modifications, variations, and substitutions may be made without departing from the spirit and scope of the present invention, such as the shape and size of the magnetic seat and the magnetic holder. Moreover, the magnets can be provided at the magnetic holders respectively while the magnetic seats are made of non-magnetic material or soft-magnetic metal having magnetic attraction ability so as to enhance the magnetic engagement between the shelter frame and the primary spectacle frame.

It will thus be seen that the objects of the present invention have been fully and effectively accomplished. It embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure form such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.